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Technical S pecification
PQ55530HEB08
48V in
Input
53Vout
Output
7.6Amp
Current
2250Vdc
Isolation
Half-brick
DC/DC Conver ter
Th e P Q55 530HEB0 8 P owerQo r (R) Exa conver ter is an iso l a te d, fixed swit c hin g fr eq ue nc y DC /DC co nv er t er t ha t u s es s y nc hr on ou s r ect ifi ca ti on t o ac hiev e e xtr eme ly high effic ien cy a n d p ower d ens ity . Th is m od ul e is ide al ly s uited to s up p or t th e IEEE 80 2.3 af sta nd ar d for P ower Ov er LAN a n d Vo IP a p pl ica tion s. Th e 5 3Vo ut mod ul es fe atu re 2, 25 0Vd c iso la tio n and lo w comm on mo de no ise. T he Ex a s eri es co nver t e rs of fer ind u str y le ad in g u sea b le ou tpu t p ower fo r an y s tan dard "half-brick" module. RoHS compliant (see page 13 ).
Operational Features
* Ultra-high efficiency, 95% at full rated load current * Delivers up to 400 Watts of output power with minimal derating - optional open frame unit available * Input voltage range: 38V - 55V, with 80V for 100ms input transient capability * Fixed frequency switching provides predictable EMI performance * On-board input and output filtering
PQ55530HEB08 Module
Pr otection Features
* Input under-voltage lockout disables converter at low input voltage conditions * Output current limit and short circuit protection protects converter and load from permanent damage * Active back bias limit prevents damage to converter from external load induced pre-bias * Latching output over-voltage protection * Thermal shutdown
Mechanical Features
* Industry standard half-brick pin-out configuration * Industry standard size: 2.3" x 2.4" (58.4 x 61.0mm) * Total height only 0.50" (12.7mm) for baseplated unit, open-frame only 0.420" (10.67mm) * Total weight: 4.3 oz. (123 grams) for baseplated unit, open-frame 2.6oz. (75 grams)
Safety Features
* 2250V, 30 MW input-to-output isolation * UL/cUL 60950-1 recognized (US & Canada), basic insulation rating * TUV certified to EN60950-1 * Meets 72/23/EEC and 93/68/EEC directives * Meets UL94V-0 flammability requirements
Contr ol Features
* On/Off control referenced to input side (positive and negative logic options are available) * Remote sense for the output voltage compensates for output distribution drops * Output voltage trim permits custom voltages and voltage margining
Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 1
Technical Specification
MECHANICAL DIAGRAM (base-plated)
0.700
(17.78)
Input: Output: Current: Package:
2.40
(61.0)
38-55 V 53 V 7.6 A Half-brick
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
(5.1)
0.400
(10.16)
Side View Top View
1.90
(48.3)
0.50
(12.7)
1.90
(48.3)
2.30
(58.4)
0.19
(4.8)
.030 +.028
(0.81 +.71)
Bottom side Clearance
Lowest Component Load Board
Flanged Pin See Note 12
0.145 typ.
(3.68) See Note 6
0.400
(10.16)
M3 Threaded Standoff 4 Places See Note 1 Pin Farside Typical
0.50
(12.6)
1.400
(35.56)
NOTES
1) M3 screws used to bolt unit's baseplate to other surfaces (such as heatsink) must not exceed 0.100" (2.54 mm) depth below the surface of the baseplate. 2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm) 3) Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface 4) Pins 1, 2, 4, 6-8, are 0.040" (1.02mm) diameter with 0.080" (2.03mm) diameter standoff shoulders 5) Pins 5, 9 are 0.080" (2.03mm) diameter shoulderless pins. 6) Other pin extension lengths available 7) All Pins: Material - Copper Alloy Finish (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin over Nickel plate 8) Undimensioned components are shown for visual reference only. 9) Weight: 4.3 oz. (123 g) typical 10) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 11) Workmanship: Meets or exceeds IPC-A-610C Class II 12) For information regarding soldering and cleaning of base-plated units please refer to the "Base-Plate Soldering & Cleaning product advisory" on our website's Technical Documents page.
Product # PQ55530HEB08 Phone 1-888-567-9596
PIN DESIGNATIONS
Pin No. Name
1 2 4 5 6 7 8 9
Notes: 1. SENSE(-) should be connected to Vout(-) either remotely or at the converter. 2. Leave TRIM pin open for nominal output voltage. 3. SENSE(+) should be connected to Vout(+) either remotely or at the converter.
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 2
Function
Positive input voltage TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage Negative output voltage Return remote sense Output voltage trim Positive remote sense Positive output voltage
Vin(+) ON/OFF Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+)
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Technical Specification
MECHANICAL DIAGRAM (open frame)
.400
(10.16)
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
1.40 1.000 .700
(17.78) (35.56) (35.56)
Side View
0.420
(10.67)
2.30
(58.4)
1.90 .030 +.028
(0.81 +.71) (48.3)
Top View
Bottom side Clearance
Lowest Component Load Board
Flanged Pin See Note 10
0.145 typ.
(3.68) See Note 3
.400 .19
(4.8)
.50
(12.7)
(10.16)
1.40
(35.56)
2.40
(61.0)
NOTES
1) Pins 1-4, 6-8 are 0.040" (1.02mm) diameter. with 0.080" (2.03mm) diameter standoff shoulders. 2) Pins 5 and 9 are 0.080" (2.03 mm) diameter with 0.125" (3.18mm) diameter standoff shoulders. 3) Other pin extension lengths available. Recommended pin length is 0.03" (0.76mm) greater than the PCB thickness. 4) All Pins: Material - Copper Alloy Finish (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin over Nickel plate 5) Undimensioned components are shown for visual reference only. 6) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 7) Weight: 2.6 oz. (75 g) typical 8) Workmanship: Meets or exceeds IPC-A-610C Class II 9) UL/TUV standards require a clearance greater than 0.04" (1.02mm)
between input and output for Basic insulation. This issue should be considered if any copper traces are on the top side of the user's board. Note that the ferrite cores are considered part of the input/primary circuit.
PIN DESIGNATIONS
Pin connections are identical to baseplated version shown on page 2. Use "A" as 10th letter in part number for open frame version (see ordering page).
10) The flanged pins are designed to permit surface mount soldering (avoiding the wave soldering process) through the use of the flanged pin-in-paste technique.
Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 3
Technical Specification
PQ55530HEx08 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
TA=25C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40C to +100C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Min. Typ. Max.
80 60 80 2250 100 125 18 48 35.2 33.0 2.1 140 42 20 130 1.0\5.0 100 52.50 52.75 53.00 53.00 55 36.4 34.3 11.8 68 0.01 40 20
Units
V V V V C C V V V V V A mA mA A 2s mA mA A H\F F V V %\mV %\mV mV mV V mV mV A A A mA F dB mV mV s
Notes & Conditions
Continuous Continuous 100ms transient Basic insulation level, Pollution degree 2
Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature Storage Temperature Voltage at ON/OFF input pin Operating Input Voltage Range Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Voltage Hysteresis Maximum Input Current No-Load Input Current Disabled Input Current Inrush Current Transient Rating Input Reflected Ripple Current Input Terminal Ripple Current Recommended Input Fuse Input Filter Component Values (L\C) Recommended External Input Capacitance Output Voltage Set Point (standard option) Output Voltage Set Point ("A" option3) Output Voltage Regulation Over Line Over Load Over Temperature (standard option) Over Temperature ("A" option3) Total Output Voltage Range Output Voltage Ripple and Noise1 Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance Input Voltage Ripple Rejection Output Voltage during Load Current Transient For a Step Change in Output Current (0.1A/s) For a Step Change in Output Current (1A/s) Settling Time Turn-On Transient Turn-On Time Start-Up Delay Time Output Voltage Overshoot 100% Load 50% Load Semiconductor Junction Temperature Board Temperature Transformer Temperature Maximum Baseplate Temperature Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance2
-40 -55 -2 38 34.0 32.0
INPUT CHARACTERISTICS
100% Load, 38 Vin, trim up 5% Vin = 38V RMS thru 4.7H inductor; Figures 16 & 18 RMS; Figures 12 & 17 Fast blow external fuse recommended Internal values; see Figure D Typical ESR 0.04 -1.0W; see Figure 16
OUTPUT CHARACTERISTICS
53.50 53.25
51.95
+0.05 \ 20 +0.1 \ 50 +0.15 \ 80 +0.2 \ 105 +100 +158 +50 +79 53.95 150 20 10.5 1.38 90 60 600 600 600 50 7.6 11.5 2.0 120 1,000
0 9.5 0.5 50
Over sample, line, load, temperature & life 20MHz bandwidth; Figures 15 & 16 Full Load; see Figures 16 & 19 Full Load; see Figures 16 & 19 Subject to thermal derating; Figures 5, 7 - 10 Output Voltage 10% Low; Figure 20 54V pre-bias voltage on output " 53Vout at 7.6A Resistive Load 120 Hz; Figure 20 50-75-50% Iout max; 200F cap; Figure 13 50-75-50% Iout max; 200F cap; Figure 14 To within 0.2% Vout nom Full load, Vout=90% nom.; Figures 11 & 12 -40C to +125C; Figure E 1,000 F load capacitance, Iout = 0A Figures 1 - 4 Figures 1 - 4 Package rated to 150C UL rated max operating temp 130C See Figures 5, 7 - 10 for derating curves Applies to PQ55525HEB08xxx unit only
DYNAMIC CHARACTERISTICS
15 4
20 6 0 95 95
28 8
ms ms % % %
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
125 125 125 100 2250 30 220
C C C C V MW pF
ISOLATION CHARACTERISTICS
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com) Note 2: Higher values of isolation capacitance can be added external to the module. Note 3: See the last page for ordering information options.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 4
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Min.
275 -2 2.7 2.7 -2
Typ.
300
Max.
325 0.8 18 18 0.8
Units
kHz V V V V V kW % % V C C
6
Notes & Conditions
Regulation and Isolation stages
Switching Frequency ON/OFF Control (Option P) Off-State Voltage On-State Voltage ON/OFF Control (Option N) Off-State Voltage On-State Voltage ON/OFF Control (Either Option) Pull-Up Voltage Pull-Up Resistance Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis Load Current Scale Factor Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Field Demonstrated MTBF
-50 57
5 10 58.5 125 10 180 1.9 1.4
5.5 +5 +5 60
Figure A Measured across Pins 9 & 5; Figure B Measured across Pins 9 & 5 Over full temp range; % of nominal Vout, Latching Average PCB Temperature See App Note: Output Load Current Calc.
RELIABILITY CHARACTERISTICS
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta 106 Hrs. See our website for details
STANDARDS COMPLIANCE
Parameter P
STANDARDS COMPLIANCE
Notes
File # E194341, Basic insulation & pollution degree 2 Certified by TUV Test on entire assembly; board & plastic components UL94V-0 compliant ESD test, 8kV - NP, 15kV air - NP (Normal Performance) Section 7 - electrical safety, Section 9 - bonding/grounding
UL/cUL 60950-1 EN60950-1 72/23/EEC 93/68/EEC Needle Flame Test (IEC 695-2-2) IEC 61000-4-2 GR-1089-CORE Telcordia (Bellcore) GR-513
* An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
# Units
32 5 5 10 5 5 5 15 pins
Test Conditions
10-55Hz sweep, 0.060" total excursion,1 min./sweep, 120 sweeps for 3 axis
Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability
95% rated Vin and load, units at derating point, 1000 hours
100g minimum, 2 drops in x and y axis, 1 drop in z axis -40C to 100C, unit temp. ramp 15C/min., 500 cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10C to Tmax+10C, 5C steps, Vin = min to max, 0-105% load 85C, 85% RH, 1000 hours, 2 minutes on and 6 hours off MIL-STD-883, method 2003
* Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply robust, reliable product. Contact the factory for official product family qualification documents.
OPTIONS
SynQor provides various options for Logic Sense, Pin Length and Feature Set for this family of DC/DC converters. Please consult the last page of this specification sheet for information on available options.
Product # PQ55530HEB08 Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents, including but not limited to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159 B2; 6,545,890 B2.
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Doc.# 005-2HEB53P Rev. B
10/4/07
Page 5
Technical Specification
100 99 98 95 97
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Efficiency (%)
90
96
Efficiency (%)
38 Vin 48 Vin 55 Vin
95 94 93 92 91 90 25C 40C 55C
85
80
75
70 0.0 0.8 1.5 2.3 3.0 3.8 4.6 5.3 6.1 6.8 7.6
100
200
300
400
Load Current (A)
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
16.0 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 25C 40C 55C
24 22 20
Power Dissipation (W)
16 14 12 10 8 6 4 2 0 0.0 0.8 1.5 2.3 3.0 3.8 4.6 5.3 6.1 6.8 7.6 38 Vin 48 Vin 55 Vin
Power Dissipation (W)
18
100
200
300
400
Load Current (A)
Air Flow (LFM)
Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
70 60 50 40 30 20 10 0 35-75Vin
8 7 6 5
OVP Shutdown
4 3 400 LFM (2.0 m/s) 2 1 0 0 25 40 55 70 85 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Output Voltage (V)
Iout (A)
-5
0
5
10
15
Ambient Air Temperature (C)
Load Current (A)
Figure 5: Maximum output power derating curves vs. ambient air temperature for a baseplated unit (full power at 100C baseplate). Airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage).
Product # PQ55530HEB08 Phone 1-888-567-9596
Figure 6: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 6
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Technical Specification
8 7 6 5
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Iout (A)
4 3 400 LFM (2.0 m/s) 2 1 0 0 25 40 55 70 85 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (C)
Figure 7: Maximum output power derating curves vs. ambient air temperature for an open frame unit. Airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage).
8 7 6 5
Figure 8: Thermal plot of converter at 5.1amp load current (271W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage).
Iout (A)
4 3 400 LFM (2.0 m/s) 2 1 0 0 25 40 55 70 85 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s)
Ambient Air Temperature (C)
Figure 9: Maximum output power derating curves vs. ambient air temperature for an open frame unit. Airflow rates of 100 LFM through 400 LFM with air flowing from pin 1 to pin 4 (nominal input voltage).
Figure 10: Thermal plot of converter at 4.95 amp load current (262W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from pin 1 to pin 4 (nominal input voltage).
Figure 11: Turn-on transient at full load (resistive load) (20 ms/div). Input voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace: ON/OFF input (5V/div)
Product # PQ55530HEB08 Phone 1-888-567-9596
Figure 12: Turn-on transient at zero load (20 ms/div). Top Trace: Vout (10V/div) Bottom Trace: ON/OFF input (5V/div)
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 7
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Technical Specification
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Figure 13: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/ s). Load cap: 200 F, electrolytic output capacitance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
Figure 14: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 1A/ s). Load cap: 330 F, electrolytic output capacitance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
See Fig. 18
source impedance
4.7 H
See Fig. 17 See Fig. 19
DC/DC Converter VSOURCE
100 F, <1W ESR
electrolytic capacitor
VOUT 1 F
200 F,
ceramic 200mW ESR capacitor electrolytic capacitor
Figure 15: Output voltage response to step-change in input voltage (1000V/ms). Load cap: 200 F, electrolytic output capacitance. Ch 1: Vin (20V/div), Ch 2: Vout (500mV/div).
Figure 16: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 17), Input Reflected Ripple Current (Figure 18) and Output Voltage Ripple (Figure 19).
Figure 17: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 4.7 H source inductor and 100 F electrolytic capacitor (100 mA/div). See Figure 16
Product # PQ55530HEB08 Phone 1-888-567-9596
Figure 18: Input reflected ripple current, is, through a 4.7 H source inductor at nominal input voltage and rated load current (10 mA/div). (See Figure 16)
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 8
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Technical Specification
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Figure 19: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1 F ceramic capacitor and 200 F tantalum capacitor. Bandwidth: 20 MHz. (See Figure 12)
1
Figure 20: Load current (5A/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit.
0 -10
0.1
Forward Transmission (dB)
Output Impedance (ohms)
-20 -30 -40 -50 -60 -70 -80 -90 -100 35 Vin 48 Vin 55 Vin
0.01
0.001
35 Vin 48 Vin 55 Vin
0.0001 100 1,000 10,000 100,000
10
100
1,000
10,000
100,000
Hz
Hz
Figure 21: Magnitude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power.
10
Figure 22: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power.
100
Reverse Transmission (dB)
0
-10
Input Impedance (ohms)
10
-20
-30 35 Vin -40 48 Vin 55 Vin -50 10 100 1,000 10,000 100,000
1 35 Vin 48 Vin 55 Vin 0.1 10 100 1,000 10,000 100,000
Hz
Hz
Figure 23: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power.
Product # PQ55530HEB08 Phone 1-888-567-9596
Figure 24: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power.
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 9
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Technical Specification
BASIC OPERATION AND FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low output voltage required. Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer's output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the primary reason that the PowerQor converter has such high efficiency, even at very low output voltages and very high output currents. The PowerQor series of half-brick and quarter-brick converters uses the industry standard footprint and pin-out configuration.
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter's output pins to the load. Pin 8 should be connected to Vout(+) and Pin 6 should be connected to Vout(-) at the point on the board where regulation is desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] - [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 8 and 6 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than its specified value. Note: the output over-voltage protection circuit senses the voltage across the output (pins 9 and 5) to determine when it should trigger, not the voltage across the converter's sense leads (pins 8 and 6). Therefore, the resistive drop on the board should be small enough so that output OVP does not trigger, even during load transients.
CONTROL FEATURES
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). There are two versions of the converter that differ by the sense of the logic used for the ON/OFF input.
ON/OFF
ON/OFF
ON/OFF
Vin(_) Remote Enable Circuit
Vin(_) Negative Logic (Permanently Enabled) ON/OFF
TTL/ CMOS
Vin(_) Positive Logic (Permanently Enabled)
5V ON/OFF
Vin(_) Open Collector Enable Circuit
Vin(_) Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 10
Technical Specification
OUTPUT VOLTAGE TRIM (Pin 7): The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Total DC Variation of Vout: For the converter to meet its full specifications, the maximum variation of the DC value of Vout, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled "Input System Instability". The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value (listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit: If the load current is increased to the current limit threshold, the current will be limited at that value, and the output voltage will decrease as the load resistance is lowered. When the load current is decreased below the current limit point, the voltage will recover to the normal, regulated level. Note: If the unit is held in overcurrent and the load is suddenly reduced to zero, an output voltage overshoot can occur and possibly trip the overvoltage protection. Output Over-Voltage Protection: If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converter will immediately shut down and latch off. To reset this latched fault condition, either the ON/OFF pin must be toggled from on to off and back on again or the input power must be removed and re-applied. Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the OverTemperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value.
Rtrim-down =
where
(100%) - 2 D
(kW)
D% =
Vnominal - Vdesired Vnominal
x 100%
To increase the output voltage, the user should connect a resistor between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be
Rtrim-up =
(Vnominal - 2) x VDES + VNOM 1.225
VDES - VNOM
(kW)
Figure B graphs the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
100,000
Trim Resistance (kOhms)
10,000
1,000
100
10
1 0 2 4 6 8 10 12 14 16 18 20
% Increase in Vout
% Decrease in Vout
Figure B: Trim Graph for 53Vout module
Note: the TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 11
Technical Specification
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because any DC/DC converter appears incrementally as a negative resistance load. A detailed application note titled "Input System Instability" is available on the SynQor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure C provides a typical circuit diagram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure D provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the "Input Characteristics" section. More detailed information is available in the application note titled "EMI Characteristics" on the SynQor website.
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 6ms when it is shut down for any reason. In all, there are three ways that the converter can be shut down, initiating a Startup Inhibit Period: * Input Under-Voltage Lockout * Over Temperature Shutdown * Turned off by the ON/OFF input Figure E shows three turn-on scenarios, where a Startup Inhibit Period is initiated at t0, t1, and t2: Before time t0, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input Under-Voltage Lockout is released, and a Startup Inhibit Period is initiated. At the end of this delay, the ON/OFF pin is evaluated, and since it is active, the unit turns on. At time t1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has elapsed. If the input voltage quickly rises over UVLO at t3, the output startup time is 12ms.
Vin(+) External Input Filter
Electrolytic Capacitor
Vout(+) Vsense(+) Rtrim-up
or
Vin
100F
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure C: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+) C Vin(_)
Figure D: Internal Input Filter Diagram (component values listed on page 4).
Product # PQ55530HEB08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2HEB53P Rev. B 10/4/07 Page 12
Technical Specification
Input: Output: Current: Package:
38-55 V 53 V 7.6 A Half-brick
Vin
Under-Voltage Lockout Turn-On Threshold
ON/OFF
(pos logic)
ON
OFF
ON 21mS
Vout
6mS
6mS
12mS
t0
t1
t2
t3
Figure E: Startup Inhibit Period (turn-on time not to scale)
RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is available as 5/6 RoHS compliant (product with lead) or 6/6 RoHS compliant. For more information please refer to SynQor's RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at rohs@synqor.com.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 13
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's PowerQor DC/DC converters follows the format shown in the example below.
PQ 55 530 H E B 08 N N S Options Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family
Model Number PQ55530HEA08 xyz PQ55530HEB08 xyz
(see Ordering Information)
Input: Output: Current: Package:
ORDERING INFORMATION
38-55 V 53 V 7.6 A Half-brick
The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. To order 6/6 RoHS compliant product please add a "-G" suffix.
Input Voltage 38 - 55 V 38 - 55 V Output Max Output Voltage Current 53.0 V 7.6 A 53.0 V 7.6 A
The following option choices must be included in place of the x y z spaces in the model numbers listed above.
Options Description: x y z
Enable Logic P - Positive N - Negative Pin Length K - 0.110" N - 0.145" R - 0.180" Y - 0.250" Feature Set S - Standard A - Tight Accuracy
The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145" pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. A "-G" suffix indicates 6/6 RoHS compliance.
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
Contact SynQor for further information:
Phone: Toll Free: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA
Phone 1-888-567-9596
Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor.
Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor.
Doc.# 005-2HEB53P Rev. B 10/4/07 Page 14
Product # PQ55530HEB08
www.synqor.com

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