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UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
T The UWE Series "Eighth-Brick" DC/DC Converters are high-current isolated power modules designed for use in high-density system boards.
Typical unit
PRODUCT OVERVIEW
With dimensions of only 0.9 by 2.3 by 0.38 inches, the UWE series open frame DC/DC converters deliver up to 75 Watts in an industry-standard "eighth-brick" through-hole package. This format can plug directly into quarter-brick pinouts. Several standard fixed-output voltages from 3.3 Vdc to 24 Vdc assure compatibility in embedded equipment, CPU cards and instrument subsystems. The extended 4-to-1 input power range (9-36V) is ideal for battery-powered, telecom or portable applications. Very high efficiency means no fans or temperature deratings in many applications. An optional thermal mounting baseplate extends operation into most conceivable environments. The synchronous rectifier design uses the maximum available duty cycle for greatest efficiency and low power dissipation with no reverse output conduction. Other features include low on-resistance FET's, planar magnetics and heavycopper PC boards. These deliver low output noise, tight line/load regulation, stable no-load operation and fast load step response. All units are precision assembled in a highly automated facility with ISOtraceable manufacturing quality standards. Isolation of 1500 Volts assures safety and fully differential (floating) operation for greatest application flexibility. On-board Sense inputs compensate for line drop errors at high output currents. Outputs are trimmable within 10% of nominal voltage. The UWE series are functionally complete. A wealth of protection features prevents damage to both the converter and outside circuits. Inputs are protected from undervoltage and outputs feature short circuit protection, overcurrent and excess temperature shut down. Overloads automatically recover using the "hiccup" technique upon fault removal. The UWE is designed to meet all standard safety and EMI/RFI certifications. All units meet RoHS-6 (no lead) hazardous materials compliance.
FEATURES
Industry-standard through-hole eighth-brick package with 0.9" x 2.3" x 0.38" outline dimensions Choice of two wide input ranges, 9-36 Vdc or 18-75 Vdc Fixed output from 3.3 to 24 Volts DC up to 75 Watts Synchronous rectification yields very high efficiency and low power dissipation Operating temperature range from -40 to +85C with derating Up to 1500 Volt DC isolation (basic insulation) Outstanding thermal performance and derating Extensive self-protection, overtemperature and overload features with no output reverse conduction On/Off control, trim and remote sense functions Meets UL/EN/IEC 60950-1, CAN/CSA-C22.2 No. 60950-1 safety approvals and FCC RFI/ EMI certification Pre-bias operation for startup protection
+VIN SWITCH DRIVE
+VOUT
VOLTAGE REGULATOR
+SENSE
SS -VIN
PWM
-VOUT
-SENSE ON/OFF CONTROL ISOLATION REFERENCE AMPLIFIER, TRIM AND FEEDBACK
TRIM
UV, OT
Typical topology is shown.
Simplified Block Diagram
For full details go to www.murata-ps.com/rohs
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MDC_UWE Series.A17 Page 1 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
SPECIFICATION SUMMARY AND ORDERING GUIDE c Output VOUT (V)
3.3 3.3 5.0 5.0 12.0 12.0 15.0 24.0
Input Regulation (max.)
Line 0.25% 0.2% 0.25% Load 0.25% 0.25% 0.125%
Efficiency
Root Model c UWE-3.3/20-Q12P-C UWE-3.3/20-Q48N-C UWE-5/15-Q12P-C UWE-5/15-Q48N-C UWE-12/6-Q12P-C UWE-12/6-Q48N-C UWE-15/5-Q12P-C UWE-24/3-Q12P-C g
IOUT (A)
20 20 15 15 6 6 5 3
Power (W)
66 66 75 75 72 72 75 72
R/N (mVp-p)
Typ. 80 165 80 Max. 125 225 125
VIN Nom. Range (V) (V)
12 48 12 9-36 18-75 9-36
IIN, no load (mA)
160 75 185
IIN, full load (A)
6.18 1.54 6.87
Min. 87% 88% 89%
Typ. 89% 89.5% 91%
Package (Case, Pinout)
Please contact Murata Power Solutions for further information. 120 115 65 190 180 150 125 275 0.125% 0.1% 0.125% 0.125% 0.05% 0.075% 0.075% 0.125% 12 48 12 12 9-36 18-75 9-36 9-36 75 90 270 110 6.56 1.65 6.83 6.70 90% 89% 89.5% 88.3% 91.5% 91% 91.5% 89.5%
C77, P32
c Please refer to the part number structure for additonal ordering model numbers and options. d All specifications are at nominal line voltage, nominal output voltage and full load, +25 C. e Output capacitors are 1 F ceramic in parallel with 10 F electrolytic. Input cap is 100 F. All
caps are low ESR types. Contact Murata Power Solutions for details. unless otherwise noted. See detailed specifications.
f I/O caps are necessary for our test equipment and may not be needed for your application. g Load regulation range: 0.1-3A. This is required only for our test equipment. The converter will
operate at zero output current with degraded regulation.
PART NUMBER STRUCTURE
U W E - 12 / 6 - Q12 P B - C
Unipolar, Single-output Wide Input Range RoHS Hazardous Materials Compliance C=RoHS-6, standard Baseplate (optional) Blank = No baseplate (standard) B = Baseplate installed (optional special order) On/Off Control Polarity P = Positive polarity (standard for Q12 models, optional for Q48 models) N = Negative polarity (standard for Q48 models, optional special order for Q12 models)
Eighth-Brick Package
Nominal Output Voltage
Note:
Maximum Rated Output Current in Amps Input Voltage Range Q12 = 9-36 Volts Q48 = 18-75 Volts Some model number combinations may not be available. Contact Murata Power Solutions for further information.
DETAIL SPECIFICATIONS, Q12 MODELS UWE-3.3/20-Q12 Specs are typical unless noted. INPUT Input voltage range Start-up threshold, Volts Undervoltage shutdown, V. Overvoltage shutdown, V. Reflected (back) ripple current, mA pk-pk Suggested external fuse, A Input current Full load conditions Inrush transient, A2sec Input current if output is in short circuit, mA No load, mA Low line (Vin=min.), Amps Standby mode, mA 250 160 8.33 8 200 185 9.42 5 See ordering guide 0.1 A2sec 250 75 8.89 5 250 270 9.36 5 250 110 9.04 5 25 25 10 20 9.5 8.5 8 8 none 40 20 1 20 40 20 See ordering guide 9 8.2 8 UWE-5/15-Q12 UWE-12/6-Q12 UWE-15/5-Q12 UWE-24/3-Q12 18
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MDC_UWE Series.A17 Page 2 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, Q12 MODELS, CONTINUED INPUT (continued) (Off, UV, OT shutdown) Internal input filter type Reverse polarity protection Remote On/Off control Positive logic ("P" model suffix) OFF=Ground pin to +0.8V max. ON=open pin or +3.5 to +15V max. OFF=open pin or +5V to +15V max. ON=Ground pin or 0 to +0.8V max. 1 UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-12/6-Q12 L-C Yes UWE-15/5-Q12 UWE-24/3-Q12
Negative logic ("N" model suffix) Current, mA OUTPUT Voltage output range Voltage output accuracy Adjustment range Temperature coefficient Minimum loading Remote sense compensation Ripple/noise (20 MHz bandwidth) Line/Load regulation Efficiency Maximum capacitive loading, F low ESR <0.02 max., resistive load Isolation voltage Input to Output, Volts min. DC Input to baseplate, Volts min. DC Baseplate to output, Volts min. DC Isolation resistance, M Isolation capacitance, pF Isolation safety rating Current limit inception (98% of Vout, after warmup), Amps Short circuit protection method Short circuit current, Amps Short circuit duration Overvoltage protection, Volts (via magnetic feedback) DYNAMIC CHARACTERISTICS Dynamic load response, Sec (50-75-50% load step) to 1% of final value Start-up time Vin to Vout regulated, mSec Remote On/Off to Vout regulated, mSec Switching frequency, KHz 20 5 24525 20 15 215-250 4.5 6 0.5 27 22.5 1500 1000 10,000 10,000
See ordering guide 1% of Vnom., (50% load) -10 to +10% of Vnom. 0.02% of Vout range per C No minimum load +10% max. See ordering guide See ordering guide See ordering guide 4,700 4700 1500
1500 1500 750 100 1000 Basic insulation 8.5 7.25 4.0 1000 1000
Current limiting, hiccup autorestart. Remove overload for recovery. 1.0 1.5 Continuous, output shorted to ground. No damage. 15 18 29 1.5 1.0
50
40 30 275 25
30 25 275 25
40 30 215 15
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MDC_UWE Series.A17 Page 3 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, Q12 MODELS, CONTINUED ENVIRONMENTAL Operating temperature range, no baseplate with derating, C (see Derating curves) Storage temperature range, C Maximum baseplate operating temperature, C Thermal protection/shutdown, C Relative humidity PHYSICAL Outline dimensions Pin material Pin Finish Pin diameter, inches Pin diameter, mm Weight, ounces Weight, grams Electromagnetic interference (conducted) Safety See mechanical specs Copper alloy Nickel underplate with gold overplate (see mechanical specs for details) 0.04/0.062 1.016/1.575 0.7 20 Meets FCC part 15, class B, EN55022 conducted and CISPR22 class B conducted with external filter. Meets UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1 UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-12/6-Q12 -40 to +85 with derating -55 to +125 +100 +120 to +85C/85% non-condensing UWE-15/5-Q12 UWE-24/3-Q12
DETAIL SPECIFICATIONS, Q48 MODELS UWE-12/6-Q48 Specs are typical unless noted. INPUT Input voltage range Start-up threshold, Volts Undervoltage shutdown, V. Overvoltage shutdown, V. Reflected (back) ripple current, mA pk-pk Suggested external fuse, A Input current Full load conditions Inrush transient, A2sec Input current if output is in short circuit, mA No load, mA Low line (Vin=min.), Amps Standby mode, mA (Off, UV, OT shutdown) Internal input filter type Reverse polarity protection Remote On/Off control Positive logic ("P" model suffix) OFF=Ground pin to +0.8V max. ON=open pin or +3.5 to +15V max. OFF=open pin or +5V to +15V max. ON=Ground pin or 0 to +0.8V max. 1 0.1 A2sec 100 90 4.35 4 Pi-type None See ordering guide 0.1 A2sec 150 75 4.1 4 40 10 17.5 16 none 30 8 See ordering guide 17.5 16.5 UWE-3.3/20-Q48
Negative logic ("N" model suffix) Current, mA
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MDC_UWE Series.A17 Page 4 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
DETAIL SPECIFICATIONS, Q48 MODELS, CONTINUED OUTPUT Voltage output range Voltage output accuracy Adjustment range Temperature coefficient Minimum loading Remote sense compensation Ripple/noise (20 MHz bandwidth) Line/Load regulation Efficiency Maximum capacitive loading, F low ESR <0.02 max., resistive load Isolation voltage Input to Output, Volts min. DC Input to baseplate, Volts min. DC Baseplate to output, Volts min. DC Isolation resistance, M Isolation capacitance, pF Isolation safety rating Current limit inception (98% of Vout, after warmup), Amps Short circuit protection method Short circuit current, Amps Short circuit duration Overvoltage protection, Volts (via magnetic feedback) DYNAMIC CHARACTERISTICS Dynamic load response, Sec (50-75-50% load step) to final value Start-up time Vin to Vout regulated, mSec Remote On/Off to Vout regulated, mSec Switching frequency, KHz ENVIRONMENTAL Operating temperature range, no baseplate with derating, C (see Derating curves) Storage temperature range, C Maximum baseplate operating temperature, C Thermal protection/shutdown, C Relative humidity PHYSICAL Outline dimensions Pin material Pin Finish Pin diameter, inches Pin diameter, mm Weight, ounces Weight, grams Electromagnetic interference (conducted) Safety See mechanical specs Copper alloy Nickel underplate with gold overplate (see mechanical specs for details) 0.04/0.062 1.016/1.575 0.7 20 Designed to meet FCC part 15, class B, EN55022 conducted and CISPR22 class B conducted. Designed to meet UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1 +120 to +85C/85% non-condensing -40 to +85 with derating -55 to +125 +100 +120 to +85C/85% non-condensing -40 to +85 with derating -55 to +125 30 20 22020 20 10 21520 50 (to 1%) 50 (to 2%) 15 8.0 2250 1500 750 100 1000 Basic insulation 26.5 2250 1500 750 100 1000 4,700 UWE-12/6-Q48 See ordering guide 1% of Vnom., (50% load) -10 to +10% of Vnom. 0.02% of Vout range per C No minimum load +10% max. See ordering guide See ordering guide See ordering guide 4,700 UWE-3.3/20-Q48
Current limiting, hiccup autorestart. Remove overload for recovery. 1.0 Continuous, output shorted to ground. No damage. 4 5.0
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MDC_UWE Series.A17 Page 5 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
CALCULATED MTBF (TELCORDIA SR-332 METHOD, SEE NOTE 4A) Model UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-5/15-Q48 UWE-12/6-Q12 Hours 1,248,001 1,847,009 2,273,212 3,755,203
CALCULATED MTBF (MIL-HDBK-217N2 METHOD, SEE NOTE 4B) UWE-3.3/20-Q12 UWE-5/15-Q12 UWE-5/15-Q48 UWE-12/6-Q12 1,089,141 1,936,627 1,657,518 1,239,521
SPECIFICATION NOTES
CAUTION: This product is not internally fused. To comply with safety agency certifications and to avoid injury to personnel or equipment, the user must supply an external fast-blow fuse to the input terminals. See fuse information. 1 All Q12 models are tested and specified with external 1F and 10F paralleled ceramic/tantalum output capacitors and a 100F external input capacitor. Q48 models test with a 35F input cap. All capacitors are low ESR types. Contact Murata Power Solutions for details. These capacitors are necessary to accommodate our test equipment and may not be required to achieve specified performance in your applications. However, Murata Power Solutions recommends using these capacitors in your application. All models are stable and regulate within spec under no-load conditions. All specifications are typical unless noted. General conditions for Specifications are +25 C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under power. 2 Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering is Cin=33 F, Cbus=220 F, Lbus=12 H. 3 Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total RMS current over time does not exceed the Derating curve. All Derating curves are presented at sea level altitude. Be aware that power dissipation degrades as altitude increases. 4a Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ISSUE 2, ground fixed controlled conditions, Tambient=+25C, full output load, natural air convection. 4b Mean Time Before Failure is calculated using MIL-HDBK-217F, GB ground benign, Tambient=+25C, full output load, natural air convection. 5 The Remote On/Off Control is normally controlled by a switch or open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. 6 Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. 7 The outputs are not intended to sink appreciable reverse current. 8 Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction. Larger caps (especially low-ESR ceramic capacitors) may slow transient response or degrade stability. Use only as much output filtering as needed to achieve your noise requirements and no more. Thoroughly test your system under full load with all components installed. 9 All models are fully operational and meet published specifications, including "cold start" at -40 C. At full power, the package temperature of all on-board components must not exceed +128 C. 10 Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. 11 If the user adjusts the output voltage, accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use 1% or better tolerance metal-film resistors. If no trim is installed, the converter will achieve its rated accuracy. Do not exceed maximum power specifications when adjusting the output trim. 12 Output current limit and short circuit protection is non-latching. When the overcurrent fault is removed, the converter will immediately recover. 13 Alternate pin length and/or other output voltages may be available under special quantity order. 14 At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load. 15 Input Fusing: To ensure reverse input protection with full output load, always connect an external input slow-blow fuse in series with the +Vin input. Use approximately twice the full input current rating at the selected input voltage. 16 "Hiccup" overcurrent operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent condition still exists, the restart current will be removed and then tried again. This short current pulse prevents overheating and damaging the converter. Once the fault is removed, the converter immediately recovers normal operation. 17 Note that the converter will operate up to the rated baseplate maximum temperature with the baseplate installed and properly heat sunk. To avoid thermal selfprotection shutdown, do not exceed this maximum baseplate temperature. 18 UWE-24/3-Q12 undervoltage shutdown of 8.0V is at half load. 19 UWE-24/3-Q12 output overvoltage protection requires 0.3A minimum load. 20 Pre-bias operation: Startup will succeed if the output setpoint voltage is higher than the pre-existing external output voltage.
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MDC_UWE Series.A17 Page 6 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
MECHANICAL SPECIFICATIONS--NO BASEPLATE
2.30 (58.4)
TOP VIEW
0.90 (22.9)
ISOMETRIC VIEW
.071.002 STANDOFF .040 PIN AT EACH
SIDE VIEW
0.21 (5.3) @ .062 PINS
END VIEW
0.38 (9.7) MAX
MOUNTING PLANE
.040.002 AT PINS 1-3, 5-7 .062.002 AT PINS 4 & 8
0.19 (4.8) @ .040 PINS
I/O CONNECTIONS
Pin 1 2 3 4 5 6 7 8 Function - Vin On/Off Control * +Vin - Vout - Sense Trim + Sense + Vout
0.15 (3.8) PIN 1
2.000 (50.8) PIN 4
BOTTOM VIEW
PIN 5
.300 .45 .600
* The Remote On/Off can be provided with either positive (P suffix) or negative (N suffix) polarity
.150 .150
.600 REF
Connect each sense input to its respective Vout if sense is not connected at a remote load.
PIN 2 PIN 3 MATERIAL: .040 PINS: C26000 BRASS, 3/4 HARD .062 PINS: C10200 COPPER ALLOY, FULL HARD
PIN 6 PIN 7 PIN 8
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
FINISH: (ALL PINS) GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)
Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 2 Components are shown for reference only.
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MDC_UWE Series.A17 Page 7 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
MECHANICAL SPECIFICATIONS (continued)--BASEPLATE INSTALLED
4X THRU M2X0.4 - 6H .15" MAX SCREW PENETRATION
2.30 (58.4)
TOP VIEW
0.90 (22.9)
.625
ISOMETRIC VIEW
.40 .071.002 STANDOFF .040 PIN AT EACH
1.500
0.14 (3.6) ALUMINUM BASEPLATE 0.21 (5.3) @ .062 PINS
SIDE VIEW
END VIEW
0.50 (12.7)
MOUNTING PLANE
.040.002 AT PINS 1-3, 5-7 .062.002 AT PINS 4 & 8
0.19 (4.8) @ .040 PINS
0.15 (3.8) PIN 1
2.000 (50.8) PIN 4
BOTTOM VIEW
PIN 5
.300 .45 .600
.150 .150
.600 REF
PIN 2 PIN 3 MATERIAL: .040 PINS: C26000 BRASS, 3/4 HARD .062 PINS: C10200 COPPER ALLOY, FULL HARD
PIN 6 PIN 7 PIN 8
Dimensions are in inches (mm shown for ref. only).
Third Angle Projection
FINISH: (ALL PINS) GOLD (5 MICROINCHES MIN) OVER NICKEL (50 MICROINCHES MIN)
Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 2 Components are shown for reference only.
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MDC_UWE Series.A17 Page 8 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
Soldering Guidelines
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100 C. for 30 minutes). Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
Undervoltage Shutdown limit. Subsequent re-start will not occur until the input is brought back up to the Start-Up Threshold. This built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. Start-Up Time The VIN to VOUT Start-Up Time is the interval of time between the point at which the ramping input voltage crosses the Start-Up Threshold and the fully loaded output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input/output capacitance, and load. The UWE Series implements a soft start circuit that limits the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. The On/Off Control to VOUT start-up time assumes the converter has its nominal input voltage applied but is turned off via the On/Off Control pin. The specification defines the interval between the point at which the converter is turned on and the fully loaded output voltage enters and remains within its specified accuracy band. Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up time is also governed by the internal soft start circuitry and external load capacitance. The difference in start up time from VIN to VOUT and from On/Off Control to VOUT is therefore insignificant. Input Source Impedance UWE converters must be driven from a low ac-impedance input source. The DC/DC's performance and stability can be compromised by the use of highly inductive source impedances. For optimum performance, components should be mounted close to the DC/DC converter. If the application has a high source impedance, low VIN models can benefit from increased external input capacitance. I/O Filtering, Input Ripple Current, and Output Noise All models in the UWE Converters are tested/specified for input reflected ripple current and output noise using the specified external input/output components/ circuits and layout as shown in the following two figures. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient IR drops in conductors from backplane to the DC/DC. Input caps should be selected for bulk capacitance (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The switching nature of DC/DC converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specific system configuration may necessitate additional considerations.
TO OSCILLOSCOPE LBUS CBUS
-
For Sn/Ag/Cu based solders: Maximum Preheat Temperature Maximum Pot Temperature Maximum Solder Dwell Time For Sn/Pb based solders: Maximum Preheat Temperature Maximum Pot Temperature Maximum Solder Dwell Time
115 C. 270 C. 7 seconds 105 C. 250 C. 6 seconds
Absolute Maximum Ratings
Input Voltage Q12 Models - Volts, max. continuous Volts, transient, 100 mSec Q48 Models - Volts, max. continuous Volts, transient, 100 mSec On/Off Control Input Reverse Polarity Protection Output Overvoltage Output Current (Note 7) 0-36 VDC 0-50 VDC 0-75 VDC 0-100 VDC -0.7 V. min to +15V max. See Fuse section. Vout nom. +20% max. Current-limited. Devices can withstand sustained short circuit without damage. Device includes electronic overtemperature shutdown protection under normal operation. -55 to +125 C. See soldering specifications
Overtemperature Protection
Storage Temperature Lead Temperature
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied or recommended.
TECHNICAL NOTES
Input Fusing Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. Fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exist. For MPS UWE DC/DC Converters, you should use slow-blow type fuses, installed in the ungrounded input supply line. Refer to the specifications for fuse values. All relevant national and international safety standards and regulations must be observed by the installer. For system safety agency approvals, the converters must be installed in compliance with the requirements of the end-use safety standard, e.g., IEC/EN/UL60950-1. Input Undervoltage Shutdown and Start-Up Threshold Under normal start-up conditions, devices will not begin to regulate until the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once operating, devices will not turn off until the input voltage drops below the
CURRENT PROBE
+INPUT
+
VIN
CIN
-INPUT CIN = 33F, ESR < 700m @ 100kHz CBUS = 220F, ESR < 100m @ 100kHz LBUS = 12H Figure 2. Measuring Input Ripple Current
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MDC_UWE Series.A17 Page 9 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
In critical applications, output ripple/noise (also referred to as periodic and random deviations or PARD) may be reduced below specified limits using filtering techniques, the simplest of which is the installation of additional external output capacitors. These output caps function as true filter elements and should be selected for bulk capacitance, low ESR and appropriate frequency response. All external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. Temperature variations for all relevant parameters should also be taken carefully into consideration. The most effective combination of external I/O capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. In Figure 3, the two copper strips simulate real-world pcb impedances between the power supply and its load. In order to minimize measurement errors, scope measurements should be made using BNC connectors, or the probe ground should be less than 1/2 inch and soldered directly to the fixture. Thermal Shutdown These UWE converters are equipped with thermal-shutdown circuitry. If environmental conditions cause the internal temperature of the DC/DC converter to rise above the designed operating temperature, a precision temperature sensor will power down the unit. When the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. See Performance/ Functional Specifications. Output Overvoltage Protection UWE output voltages are monitored for an overvoltage condition via magnetic feedback. The signal is coupled to the primary side and if the output voltage rises to a level which could be damaging to the load, the sensing circuitry will power down the PWM controller causing the output voltages to decrease. Following a time-out period the PWM will restart, causing the output voltages to ramp to their appropriate values. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. Current Limiting As soon as the output current increases to substantially above its rated value, the DC/DC converter will go into a current-limiting mode. In this condition, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. This is commonly referred to as power limiting. Current limit inception is defined as the point at which the full-power output voltage falls below the specified tolerance. See Performance/Functional Specifications. If the load current, being drawn from the converter, is significant enough, the unit will go into a short circuit condition as specified under "Performance." Short Circuit Condition When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following a time-out period, the PWM will restart causing the output voltages to begin ramping to their appropriate values. If the short-circuit condition persists, another shutdown cycle will be initiated. This on/off cycling is referred to as "hiccup" mode. The hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. The UWE is capable of enduring an indefinite short circuit output condition. Features and Options On/Off Control The input-side, remote On/Off Control function can be ordered to operate with either polarity:
+SENSE +OUTPUT
COPPER STRIP
C1
C2
SCOPE
RLOAD
-OUTPUT -SENSE COPPER STRIP
C1 = 0.47F CERAMIC C2 = NA LOAD 2-3 INCHES (51-76mm) FROM MODULE
Figure 3. Measuring Output Ripple/Noise (PARD)
Floating Outputs Since these are isolated DC/DC converters, their outputs are "floating" with respect to their input. Designers will normally use the -Output as the ground/ return of the load circuit. You can, however, use the +Output as ground/return to effectively reverse the output polarity. Minimum Output Loading Requirements UWE converters employ a synchronous-rectifier design topology and all models regulate within spec and are stable under no-load to full load conditions. Operation under no-load conditions however might slightly increase the output ripple and noise.
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MDC_UWE Series.A17 Page 10 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
Positive-polarity models ("P" part-number suffix) are enabled when the On/Off Control is left open or is pulled high, as per Figure 4. Positive-polarity devices are disabled when the On/Off Control is pulled low. Negative-polarity devices ("N" suffix) are off when the On/Off Control is open (or pulled high), and on when the On/Off Control is pulled low with respect to -VIN as shown in Figure 5.
-INPUT +OUTPUT
+SENSE ON/OFF CONTROL 20k: 5-20 TURNS
TRIM
LOAD
-SENSE +INPUT
-OUTPUT
+ Vcc ON/OFF CONTROL CONTROL
Figure 6. Trim Connections Using A Trimpot
-INPUT
+OUTPUT
+SENSE
-INPUT
ON/OFF CONTROL TRIM R1 -SENSE +INPUT LOAD
Figure 4. Driving the Positive Polarity On/Off Control Pin
-OUTPUT
Figure 7. Trim Connections To Increase Output Voltages Using a Fixed Resistor
+ Vcc
ON/OFF CONTROL
-INPUT
+OUTPUT
+SENSE
-INPUT
ON/OFF CONTROL
TRIM R2 -SENSE
LOAD
Figure 5. Driving the Negative Polarity On/Off Control Pin
+INPUT
-OUTPUT
Figure 8. Trim Connections To Decrease Output Voltages
Dynamic control of the remote on/off function is facilitated with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). The drive circuit should be able to sink appropriate current (see Performance Specs) when activated and withstand appropriate voltage when deactivated. Applying an external voltage to the On/Off Control when no input power is applied to the converter can cause permanent damage to the converter. Trimming Output Voltage UWE converters have a trim capability that allows users to adjust the output voltages. Adjustments to the output voltages can be accomplished via a trim pot (Figure 6) or a single fixed resistor as shown in Figures 7 and 8. A single fixed resistor can increase or decrease the output voltage depending on its connection. The resistor should be located close to the converter and have a TCR less than 100ppm/C to minimize sensitivity to changes in temperature. If the trim function is not used, leave the trim pin floating.
A single resistor connected from the Trim to the +Output, or +Sense where applicable, will increase the output voltage in this configuration. A resistor connected from the Trim to the -Output, or -Sense where applicable, will decrease the output voltage in this configuration. Trim adjustments greater than the specified range can have an adverse affect on the converter's performance and are not recommended. Excessive voltage differences between VOUT and Sense, in conjunction with trim adjustment of the output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Power derating is based on maximum output current and voltage at the converter's output pins. Use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter's specified rating or cause output voltages to climb into the output overvoltage region. Therefore: (VOUT at pins) x (IOUT) <= rated output power
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MDC_UWE Series.A17 Page 11 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
Trim Equations
Trim Up 3.3 Volt Output
RT UP (k:) =
Trim Down
Remote Sense Note: The Sense and VOUT lines are internally connected through low value resistors. Nevertheless, if the sense function is not used for remote regulation the user should connect the +Sense to +VOUT and -Sense to -VOUT at the DC/DC converter pins. UWE series converters have a sense feature to provide point of use regulation, thereby overcoming moderate IR drops in pcb conductors or cabling. The remote sense lines carry very little current and therefore require minimal cross-sectional-area conductors. The sense lines are used by the feedback control-loop to regulate the output. As such, they are not low impedance points and must be treated with care in layouts and cabling. Sense lines on a pcb should be run adjacent to dc signals, preferably ground. In cables and discrete wiring applications, twisted pair or other techniques should be implemented. UWE series converters will compensate for drops between the output voltage at the DC/DC and the sense voltage at the DC/DC provided that: [VOUT(+) -VOUT(-)] -[Sense(+) -Sense (-)] d 5% VOUT Output overvoltage protection is monitored at the output voltage pin, not the Sense pin. Therefore, excessive voltage differences between VOUT and Sense in conjunction with trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Power derating is based on maximum output current and voltage at the converter's output pins. Use of trim and sense functions can cause output voltages to increase thereby increasing output power beyond the UWE's specified rating or cause output voltages to climb into the output overvoltage region. Also, the use of Trim Up and Sense combined may not exceed +10% of VOUT. Therefore, the designer must ensure: (VOUT at pins) x (IOUT) d rated output power
Contact and PCB resistance losses due to IR drops -INPUT +OUTPUT IOUT +SENSE Sense Current ON/OFF CONTROL TRIM Sense Return -SENSE IOUT Return +INPUT -OUTPUT Contact and PCB resistance losses due to IR drops LOAD
13.3(VO - 1.226) VO - 3.3
-10.2
RTDOWN (k:) =
16.31 3.3 - VO
-10.2
5 Volt Output
RT UP (k:) =
20.4(VO - 1.226) VO - 5
-10.2
RTDOWN (k:) =
25.01 5 - VO
-10.2
12 Volt Output
RT UP (k:) =
49.6(VO - 1.226) VO - 12
-10.2
RTDOWN (k:) =
60.45 12 - VO
-10.2
24 Volt Output
RT UP (k:) =
101(VO - 1.226) VO - 24
-10.2
RTDOWN (k:) =
124.2 24 - VO
-10.2
Note: Resistor values are in k:. Adjustment accuracy is subject to resistor tolerances and factory-adjusted output accuracy. VO = desired output voltage.
Figure 9. Remote Sense Circuit Configuration
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MDC_UWE Series.A17 Page 12 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-3.3/20-Q12N
Efficiency vs. Line Voltage and Load Current @ 25C
92 90 88 86
Efficiency (%)
84 82 80 78 76 74 72 2 4 6 8 10
Vin = 36 V Vin = 30 V Vin = 24 V Vin = 12 V Vin = 9 V
12
14
16
18
20
Load Current (Amps)
Maximum Current Temperature Derating @ sea level (VIN = 12V, transverse airflow, no baseplate)
20 19
UWE-3.3/20-Q12N
Maximum Current Temperature Derating @sea level (VIN = 12V, transverse airflow, with baseplate)
20
19
18
Output Current (Amps)
17 16 15 14 13 12 11 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Current (Amps)
18
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
17
16
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
15
14
13 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
UWE-3.3/20-Q12N
Maximum Current Temperature Derating @sea level (VIN = 24V, transverse airflow, with baseplate)
20
19
Output Current (Amps)
18
17
16
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
15
14
13 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 13 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-3.3/20-Q48P
Efficiency vs. Line Voltage and Load Current @ 25C
94 90 86 82 78
Efficiency (%)
Vin = 75 V Vin = 60 V Vin = 48 V Vin = 36 V Vin = 24 V Vin = 24 V
74 70 66 62 58 54 50 2 4 6 8 10
12
14
16
18
20
Load Current (Amps)
Maximum Current Temperature Derating @ sea level (VIN = 24V, transverse airflow, no baseplate)
20
UWE-3.3/20-Q48P
Maximum Current Temperature Derating @sea level (VIN = 24V, transverse airflow, with baseplate)
20
19
19
Output Current (Amps)
18
Output Current (Amps)
17
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
18
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
17
16
16
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
UWE-3.3/20-Q48P
Maximum Current Temperature Derating @ sea level (VIN = 48V, transverse airflow, no baseplate)
20
20
Maximum Current Temperature Derating @sea level (VIN = 48V, transverse airflow, with baseplate)
19
19
18
Output Current (Amps)
18
Output Current (Amps)
17 16 15 14
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
17
16
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
15
13
14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
12 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 14 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-5/15-Q12N
Efficiency vs. Line Voltage and Load Current @ 25C
94 92 90 88 86 84 82 80 78 76 74 72 70 68 66 64 62 60 58 56 54 52 50 1 2 3 4 5 6 7 8
Efficiency (%)
Vin = 36 V Vin = 24 V Vin = 12 V Vin = 9 V
9
10
11
12
13
14
15
Load Current (Amps)
UWE-5/15-Q12N
Maximum Current Temperature Derating @ sea level (VIN = 12V, transverse airflow, no baseplate)
16 15.5
Maximum Current Temperature Derating @sea level (VIN = 12V, transverse airflow, with baseplate)
16
15
15
Output Current (Amps)
14.5
14
Output Current (Amps)
14 13.5 13 12.5 12 11.5
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
13
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
12
11
10
11 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 15 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-12/6-Q12N
Efficiency vs. Line Voltage and Load Current @ 25C
94 92
9 10
Power Dissipation vs. Load Current @ 25C
90 88 86
8 7
Efficiency (%) f
Loss (Watts)
84 82 80 78 76 74 72 70 68 1 2 3
Vin = 36 V 3 Vin = 30 V Vin 2 Vi = 24 V Vin = 12 V Vin = 10 V 0 Vin Vi = 9 V
6 5 4 3 2 1
Vin = 36 V Vin = 30 V Vin Vi = 24 V Vin = 12 V Vin = 10 V 0 Vin Vi = 9 V
4
5
6
1
2
3
Load Current (Amps) t
Load Current (Amps) t
4
5
6
UWE-12/6-Q12N
Maximum Current Temperature Derating @ sea level (VIN = 12V, transverse airflow, no baseplate)
6.0 6.0
Maximum Current Temperature Derating @sea level (VIN = 12V, transverse airflow, with baseplate)
5.5
Output Current (Amps)
5.0
Output Current (Amps)
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
5.5
Natural Convection 100 LFM 200 LFM 300+ LFM
5.0
4.5
4.5
4.0 40 45 50 55 60 65 70 75 80 85 90
4.0 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 16 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-12/6-Q48P
Efficiency vs. Line Voltage and Load Current @ 25C
94 92 90 88 86 84 82 80 78 76 74 72 70 68 66 64 62 60 1 2 3 4 5 6
Vin = 75 V Vin = 60 V Vin = 48 V Vin = 36 V Vin = 24 V Vin = 18 V
Efficiency (%)
Load Current (Amps)
Maximum Current Temperature Derating @ sea level (VIN = 24V, transverse airflow, no baseplate)
6.5
UWE-12/6-Q48P
6.5
Maximum Current Temperature Derating @sea level (VIN = 24V, transverse airflow, with baseplate)
6.0
6.0
Output Current (Amps)
5.5
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
Output Current (Amps)
5.5
Natural Convection 100 LFM 200 LFM
5.0
5.0
4.5
4.5
4.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
4.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
Maximum Current Temperature Derating @ sea level (VIN = 48V, transverse airflow, no baseplate)
6.5
UWE-12/6-Q48P
Maximum Current Temperature Derating @sea level (VIN = 48V, transverse airflow, with baseplate)
6.5
6
6
Output Current (Amps)
5.5
Output Current (Amps)
5
4.5
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
5.5
5
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
4
4.5
3.5
4
3 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 17 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-15/5-Q12P
Efficiency vs. Line Voltage and Load Current @ 25C
94 92 90 88 86 84 82 80 78 76 74 72 70 68 66 64 62 60 58 56 54 52 50 0.5 1 1.5 2 2.5
Efficiency (%)
Vin = 36 V Vin = 24 V Vin = 12 V Vin = 9 V
3
3.5
4
4.5
5
Load Current (Amps)
Maximum Current Temperature Derating @ sea level (VIN = 12V, transverse airflow, no baseplate)
5
UWE-15/5-Q12N
Maximum Current Temperature Derating @sea level (VIN = 12V, transverse airflow, with baseplate)
5
4.5
Output Current (Amps)
4
Output Current (Amps)
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
Natural Convection 100 LFM 200 LFM
4.5
4
3.5
3.5
3 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
3 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
Maximum Current Temperature Derating @ sea level (VIN = 24V, transverse airflow, no baseplate)
5
UWE-15/5-Q12N
Maximum Current Temperature Derating @sea level (VIN = 24V, transverse airflow, with baseplate)
5
4.5
Output Current (Amps)
4
Output Current (Amps)
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
Natural Convection 100 LFM 200 LFM
4.5
4
3.5
3.5
3 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
3 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 18 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
PERFORMANCE DATA UWE-24/3-Q12P
Efficiency vs. Line Voltage and Load Current @ 25C
95 93 91 89 87 85
Power Dissipation vs. Load Current @ 25C
12 11 10 9
Efficiency (%) f
Loss (Watts)
83 81 79 77 75 73 71 69 67 65 0.5 1 1.5 2 2.5 3
Vin = 36 V n Vin = 30 V Vin Vi = 24 V Vin = 12 V n Vin = 10 V 0 Vin Vi = 9 V
8 7 6 5 4 3 2 0.5 1 1.5 2 2.5 3
Vin = 36 V Vin = 30 V Vin Vi = 24 V Vin = 12 V Vin = 10 V 0 Vin Vi = 9 V
Load Current (Amps) t
Load Current (Amps) t
UWE-24/3-Q12P
Maximum Current Temperature Derating @ sea level (VIN = 12V, transverse airflow, no baseplate)
3.20
Maximum Current Temperature Derating @sea level (VIN = 12V, transverse airflow, with baseplate)
3.20
3.10
3.00
3.00
Output Current (Amps)
2.90
Output Current (Amps)
2.80
2.70
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
2.80
Natural Convection 100 LFM 200 LFM 300 LFM 400 LFM
2.60
2.60
2.50
2.40 40 45 50 55 60 65 70 75 80 85 90
2.40 40 45 50 55 60 65 70 75 80 85 90
Ambient Temperature (C)
Ambient Temperature (C)
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MDC_UWE Series.A17 Page 19 of 20
UWE Series
Wide Input, Isolated Eighth-Brick DC/DC Converters
SHIPPING TRAY
UWE modules are supplied in a 21-piece (3-by-7) shipping tray. The tray is an anti-static closed-cell polyethylene foam. Dimensions are shown below.
0.910 (23.1) TYP 0.455 (11.6) TYP 0.735 (18.7)
9.920 (252)
+0.000 -0.062
9.920 (252)
+0.000 -0.062
0.625 (15.9) TYP
2.400 (61) TYP Dimensions in inches (mm)
1.300 (33.0) TYP 1.06 (26.9) 7.800 (198.1)
0.25 R TYP 0.25 CHAMFER TYP (4-PL)
USA: Canada: UK: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED
03/13/09
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. (c) 2009 Murata Power Solutions, Inc.
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MDC_UWE Series.A17 Page 20 of 20

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