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Data Sheet March 30, 2011
GigaTLynxTM Non-isolated Power Modules: 4.5Vdc - 14Vdc input; 0.7Vdc to 2Vdc, 50A Output
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to RoHS EU Directive 2002/95/EC with lead solder exemption (non-Z versions) Input voltage from 4.5Vdc to 14Vdc Output voltage programmable from 0.7 Vdc to 2.0Vdc via external resistor Output current up to 50A Tunable control loop for fast transient response True differential remote sense Negative remote On/Off logic Output voltage sequencing (EZ-SEQUENCE Output over current protection (non-latching) Over temperature protection Monotonic startup under pre-bias conditions Parallel operation with active current sharing Small size and low profile: 33 mm x 22.9 mm x 10 mm (max.) (1.3 in x 0.9 in x 0.393 in (max.))
RTUNE + CO1 CTUNE
Applications
Distributed power architectures Intermediate bus voltage applications Industrial applications Telecommunications equipment

TM
)
Vin+
VIN PGOOD SEQ
+ CI2 CI1
VOUT SENSE+
Vout+
CO2
Wide operating temperature range (-40C to 85C) UL* 60950-1, 2 Ed. Recognized, CSA C22.2 No. nd 60950-1-07 Certified, and VDE (EN60950-1, 2 Ed.) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities
nd
MODULE
TRIM+
RTrim
ON/OFF
TRIMGND SENSESENSE-
Description
The GigaTLynxTM series of power modules are non-isolated dc-dc converters that can deliver up to 50A of output current. These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14Vdc) and provide a precisely regulated output voltage from 0.7Vdc to 2.0Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and over temperature protection, output voltage sequencing and TM paralleling. A new feature, the Tunable Loop , allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area.
* UL is a registered trademark of Underwriters Laboratories, Inc.

CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards
Document No: DS010-005 ver. 1.1 PDF name: APTS050A0X.pdf
Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter Input Voltage Continuous Sequencing pin voltage Operating Ambient Temperature (see Thermal Considerations section) Storage Temperature All Tstg -55 125 C All All VsEQ TA -0.3 -40 4 85 Vdc C Device All Symbol VIN Min -0.3 Max 14 Unit Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Operating Input Voltage Maximum Input Current (VIN= VIN, min to VIN, max, IO=IO, max ) Inrush Transient Input No Load Current (VIN = VIN, nom, Io = 0, module enabled) Input Stand-by Current (VIN = VIN, nom, module disabled) Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN, min to VIN, max, IO= IOmax ; See Test configuration section) Input Ripple Rejection (120Hz) All All 50 73 mAp-p dB All VO,set = 0.7Vdc VO,set = 1.8Vdc All It IIN,No load IIN,No load IIN,stand-by 73.4 136 1.3
2
Device Vo,set 2.0 All
Symbol VIN IIN,max
Min 4.5
Typ
Max 14 26 1
Unit Vdc Adc As mA mA mA
2
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a surface mount, fast acting fuse (ie. Littelfuse 456030 series) with a maximum rating of 30 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer's data sheet for further information.
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Electrical Specifications (continued)
Parameter Output Voltage Set-point (VIN=VIN,nom, IO=IO, nom, Tref=25C) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Output Regulation Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max) Temperature (Tref=TA, min to TA, max) Remote Sense Range Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout = 1F ceramic//10F ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) External Capacitance ESR 1 m ESR 10 m With the Tunable Loop ESR 1 m ESR 10 m Output Current Output Current Limit Inception (Hiccup Mode ) Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency VIN= 12V, TA=25C IO=IO, max , VO= VO,set Switching Frequency VO, set = 0.7Vdc VO,set = 1.2Vdc VO,set = 1.8Vdc All fsw 81.1 87.0 90.1 260 % % % kHz All All All All All CO, max CO, max Io IO, lim IO, s/c 0 180 5.5 20000 20000 50A F F Adc % Io Adc
1 TM
Device All All
Symbol VO, set VO, set
Min -1.0 -2.0
Typ
Max +1.0 +2.0
Unit % VO, set % VO, set
All
VO
0.7
2.0
Vdc
All All All All

5 8 8 0.5
mV mV mV Vdc
All
50
mVpk-pk
Without the Tunable Loop
All All
CO, max CO, max

1200 10000
F F
General Specifications
Parameter Telcordia Issue 2, Method I, Case 3, Calculated MTBF (IO=IO, max, TA=40C) Weight Min Typ 4,755,661 14.22 (0.5) Max Unit Hours g (oz.)
__________________________________ External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as TM getting the best transient response. See the Tunable Loop section for details.
TM
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.
Parameter On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Logic High (On/Off pin open - Module OFF) Input High Current Input High Voltage Logic Low (Module ON) Input Low Current Input Low Voltage Turn-On Delay and Rise Times (IO=IO, max , VIN = VIN, nom, TA = 25 C, ) Case 1: On/Off input is set to Logic Low (Module ON) and then input power is applied (delay from instant at which VIN =VIN, min until Vo=10% of Vo,set) Case 2: Input power is applied for at least one second and then the On/Off input is set to logic Low (delay from instant at which Von/Off=0.3V until Vo=10% of Vo, set) Output voltage Rise time (time for Vo to rise from 10% of Vo,set to 90% of Vo, set) Output voltage overshoot - Startup IO= IO, max; VIN = 4.5 to 14Vdc, TA = 25 C Over Temperature Protection (See Thermal Consideration section) Sequencing Slew rate capability (VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo) Sequencing Delay time (Delay from VIN, min to application of voltage on SEQ pin) Tracking Accuracy Power-up (2V/ms) Power-down (1V/ms) (VIN, min to VIN, max; IO, min - IO, max VSEQ < Vo) Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold Hysteresis Forced Load Share Accuracy Number of units in Parallel PGOOD (Power Good) Internal pull-up, VPGOOD Overvoltage threshold for PGOOD Undervoltage threshold for PGOOD All All All 5 112.5 87.5 V %VO, set %VO, set All All All All All 4.26 4.04 0.22 10 5 V V Vdc % Io All All TsEQ-delay VSEQ -Vo VSEQ -Vo 10 100 200 200 400 msec mV mV All dVSEQ/dt -- 2 V/msec All Tref 125 C
o o
Device
Symbol
Min
Typ
Max
Unit
All All All All
IIH VIH IIL VIL
0.5 3.0 -0.3

3.3 VIN, max 200 0.6
mA V A V
All
Tdelay
4.8
msec
All
Tdelay
4.8
msec
All
Trise
3.6
3.0
msec % VO, set
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Characteristic Curves
The following figures provide typical characteristics for the 12V Giga TLynx
95
TM
50A at 0.7Vo and at 25 C.
o
55 50
OUTPUT CURRENT, Io (A)
90
EFFICIENCY, (%)
45
NC
85
Vin=12V Vin=4.5V Vin=14V
40 35 30 25 35
0.5m/s (100LFM) 1.5m/s (300LFM) 1m/s
80
75
(200LFM)
2m/s (400LFM)
70 0 10 20 30 40 50
45
55
65
75
O
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 1. Converter Efficiency versus Output Current.
OUTPUT VOLTAGE OUTPUT CURRENT
Figure 2. Derating Output Current versus Ambient Temperature and Airflow.
VO (V) (10mV/div) IO (A) (20Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (0.2ms /div)
Figure 3. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 4. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cext =5x47uF+ +22x330uFpolymer,CTune=330nF,RTune=100ohms
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (200mV/div)
TIME, t (2ms/div)
VO (V) (200mV/div)
VIN (V) (5V/div)
TIME, t (2ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Characteristic Curves
The following figures provide typical characteristics for the 12V Giga TLynx
95
TM
50A at 1.2 Vo and at 25 C.
o
55 50
OUTPUT CURRENT, Io (A)
Vin=12V Vin=14V
90
EFFICIENCY, (%)
85
45
NC
40 35 30 25 35
0.5m/s (100LFM) 1.5m/s (300LFM) 2m/s (400LFM)
80
Vin=4.5V
75
1m/s (200LFM)
70 0 10 20 30 40 50
45
55
65
75
O
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 7. Converter Efficiency versus Output Current.
OUTPUT VOLTAGE OUTPUT CURRENT,
Figure 8. Derating Output Current versus Ambient Temperature and Airflow.
VO (V) (10mV/div) IO (A) (20Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (0.1ms /div)
Figure 9. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cext =5x47uF+ +13x330uFpolymer,CTune=120nF,RTune=180ohms
VON/OFF (V) (5V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (500mV/div)
TIME, t (2 ms/div)
VO (V) (500mV/div)
VIN (V) (5V/div)
TIME, t (2 ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). LINEAGE POWER
Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max). 6
Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Characteristic Curves
The following figures provide typical characteristics for the 12V Giga TLynx
100 95 90 85 80 75 70 0 10 20 30 40 50
Vin=4.5V
TM
50A at 1.8 Vo and at 25 C.
o
Vin=12V
55 50
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
45 40 35 30 25 35 45 55 65 75
O
Vin=14V
NC 0.5m/s (100LFM) 1m/s (200LFM) 1.5m/s (300LFM) 2m/s (400LFM)
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 13. Converter Efficiency versus Output Current.
Figure 14. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT,
OUTPUT VOLTAGE
VO (V) (10mV/div)
IO (A) (20Adiv)
VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (0.1ms /div)
Figure 15. Typical output ripple and noise (VIN = 12V, Io = Io,max).
Figure 16. Transient Response to Dynamic Load
Change from 50% to 100% at 12Vin, Cext =5x47uF+ +8x330uFpolymer,CTune=47nF,RTune=220ohms
ON/OFF VOLTAGE
VON/OFF (V) (5V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO(V) (500mV/div)
TIME, t (2 ms/div)
VO (V) (500mV/div)
VIN (V) (5V/div)
TIME, t (2 ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). LINEAGE POWER
Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max). 7
Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Test Configurations
TO OSCILLOSCOPE LTEST 1H VIN(+) CURRENT PROBE
Design Considerations
Input Filtering
The Giga TLynx module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 22 shows the input ripple voltage for various output voltages at maximum load current with 2x22 F or 4x22 F or 4x47 F ceramic capacitors and an input of 12V.
250
TM
BATTERY
CS 1000F Electrolytic E.S.R.<0.1 @ 20C 100kHz
CIN 2x100F Tantalum COM
NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above.
Input Ripple Voltage (mVp-p)
Figure 19. Input Reflected Ripple Current Test Setup.
COPPER STRIP RESISTIVE LOAD 0.1uF COM SCOPE USING BNC SOCKET GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. 10uF
2x22uF 4x22uF 4x47uF
225 200 175 150 125 100 75 50 1
Vo+
1.25
1.5
1.75
2
Output Voltage (Vdc) Figure 22. Input ripple voltage for various output voltages with 2x22 F, 4x22 F or 4x47 F ceramic capacitors at the input (maximum load). Input voltage is 12V
Figure 20. Output Ripple and Noise Test Setup.
Rdistribution
Rcontact VIN(+) VO
Rcontact
Rdistribution
Output Filtering
The Giga TLynx modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 F ceramic and 10 F ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 23 provides output ripple information for different external capacitance values at various Vo and for full load currents. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable Loop feature described
later in this data sheet.
TM
VIN
VO
RLOAD
Rdistribution
Rcontact COM COM
Rcontact
Rdistribution
NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
Figure 21. Output Voltage and Efficiency Test Setup.
VO. IO Efficiency = VIN. IIN x 100 %
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Feature Descriptions
80 70
Ripple (mVp-p)
2x10uF Ext Cap 2x47uF Ext Cap 4x47uF Ext Cap 8x47uF Ext Cap
modules, the output start-up can be synchronized (please refer to characterization curves).
60 50 40 30 20 10 0 1
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit should be equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit should operate normally once the output current is brought back into its specified range.
VIN+
1.2
1.4
1.6
1.8
2
R1
MODULE
Output Voltage(Volts)
Figure 23. Output ripple voltage for various output voltages with external 2x10 F, 2x47 F, 4x47 F or 8x47 F ceramic capacitors at the output (50A load). Input voltage is 12V.
PWM Enable I ON/OFF ON/OFF + VON/OFF Q1 5.11K GND _ 5.11K
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805 Teil 1 + A11):200911; EN 60950-1:2006 + A11:2009-03. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a surface mount, fast acting fuse (ie. Littelfuse 456030 series) with a maximum rating of 30A in the positive input lead.
Figure 24. Remote On/Off Implementation using ON/OFF .
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of 125 C is exceeded at the thermal reference point Tref . The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Remote On/Off
The GigaTLynxTM SMT power modules feature a On/Off pin for remote On/Off operation. If not using the On/Off pin, connect the pin to ground (the module will be ON). The On/Off signal (Von/off) is referenced to ground. The circuit configuration for remote On/Off operation of the module using the On/Off pin is shown in Figure 24. During a Logic High on the On/Off pin (transistor Q1 is OFF), the module remains OFF. The external resistor R1 should be chosen to maintain 3.0V minimum on the On/Off pin to ensure that the module is OFF when transistor Q1 is in the OFF state. Suitable values for R1 are 4.7K for input voltage of 12V and 3K for 5Vin. During Logic-Low when Q1 is turned ON, the module is turned ON. The On/Off pin can also be used to synchronize the output voltage start-up and shutdown of multiple modules in parallel. By connecting On/Off pins of multiple
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, module operation will be disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the GigaTLynx can be programmable to any voltage from 0.7 Vdc to 2.0Vdc by connecting a single resistor (shown as Rtrim in Figure 25) between the TRIM+ and TRIM pins of the module. The following equation will be used to set the output voltage of the module:
TM
14000 Rtrim = Vo - 0.7
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
The Giga TLynx modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.
TM
By using a 0.5% tolerance trim resistor with a TC of 100ppm, a set point tolerance of 1.5% can be achieved as specified in the electrical specification. Table 1 provides Rtrim values required for some common output voltages. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage.
Startup into Pre-biased Output
The Giga TLynx modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Vo Rmargin-down TM
Table 1
VO, set (V) 0.7 1.0 1.2 1.5 1.8 Rtrim (K) Open 46.6 28 17.5 12.7
MODULE
Q2 TRIM+
V IN(+)
V O(+)
Vout
Rtrim Q1
Rmargin-up
ON/OFF
TRIM+ LOAD R trim TRIM-
TRIM-
GND
Figure 26. Circuit Configuration for margining Output voltage.
Figure 25. Circuit configuration to program output voltage using an external resistor.
Output Voltage Sequencing
The Giga TLynx modules include a sequencing feature, TM EZ-SEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, leave it unconnected. When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected or tied to GND so that the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the SEQ pin. Alternatively, input voltage can be applied while the unit is OFF and then the unit can be enabled. In this case the SEQ signal must be applied 10ms after the unit is enabled. This delay gives the module enough time to complete its internal power-up soft-start cycle. During the delay time, the SEQ pin may be held to ground. After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until the 10
TM
Remote Sense
The GigaTLynx SMT power modules have differential Remote Sense to minimize the effects of distribution losses by regulating the voltage at the Remote Sense pin. The voltage between the SENSE pin and VOUT pin must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin.
TM
Voltage Margining
Output voltage margining can be implemented in the Giga TM TLynx modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Figure 26 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details.
Monotonic Start-up and Shutdown
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. TM When using the EZ-SEQUENCE feature to control start-up of the module, pre-bias immunity during start-up is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-up. When using the EZ-SEQUENCETM feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during TM start-up is required, the EZ-SEQUENCE feature must be disabled. For additional guidelines on using the EZSEQUENCETM feature please contact the Lineage Power technical representative for additional information.
condition. To ensure that all modules come up simultaneously, the on/off pins of all paralleled converters should be tied together and the converters enabled and disabled using the on/off pin. * The share bus is not designed for redundant operation and the system will be non-functional upon failure of one of the unit when multiple units are in parallel. In particular, if one of the converters shuts down during operation, the other converters may also shut down due to their outputs hitting current limit. In such a situation, unless a coordinated restart is ensured, the system may never properly restart since different converters will try to restart at different times causing an overload condition and subsequent shutdown. This situation can be avoided by having an external output voltage monitor circuit that detects a shutdown condition and forces all converters to shut down and restart together. When not using the active load share feature, share pins should be left unconnected.
Active Load Sharing (-P Option)
For additional power requirements, the Giga TLynx power module is also available with a parallel option. Up to five modules can be configured, in parallel, with active load sharing. Good layout techniques should be observed when using multiple units in parallel. To implement forced load sharing, the following connections should be made: * The share pins of all units in parallel must be connected together. The path of these connections should be as direct as possible. All remote-sense pins should be connected to the power bus at the same point, i.e., connect all the SENSE(+) pins to the (+) side of the bus. Close proximity and directness are necessary for good noise immunity
TM
Power Good
The Giga TLynxTM modules provide a Power Good (PGOOD) signal to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going 12.5% outside the setpoint value. The PGOOD terminal is internally pulled-up and provides a voltage of ~5V, when asserted, thus eliminating the need for an external source and pull-up resistor.
*
Tunable Loop
The Giga TLynx modules have a new feature that optimizes transient response of the module called TM Tunable Loop . External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Fig. 23) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable TM Loop is implemented by connecting a series R-C between the SENSE and TRIM+ pins of the module, as shown in Fig. 28. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.
TM
Some special considerations apply for design of converters in parallel operation: * When sizing the number of modules required for parallel operation, take note of the fact that current sharing has some tolerance. In addition, under transient conditions such as a dynamic load change and during startup, all converter output currents will not be equal. To allow for such variation and avoid the likelihood of a converter shutting off due to a current overload, the total capacity of the paralleled system should be no more than 75% of the sum of the individual converters. As an example, for a TM system of four Giga TLynx converters in parallel, the total current drawn should be less that 75% of (4 x 50A) , i.e. less than 150A. All modules should be turned on and off together. This is so that all modules come up at the same time avoiding the problem of one converter sourcing current into the other leading to an overcurrent trip
*
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 25A step load with Vin=12V.
RTUNE
VOUT SENSE+
VO
CO1
MODULE
CTUNE
TRIM+
RTrim
CO RTUNE CTUNE V
1.8V 5x47uF + 8x330uF polymer 220 47nF 35mV
1.2V 5x47uF + 13x330uF polymer 180 120nF 23mV
0.7V 5x47uF + 22x330uF polymer 100 330nF 14mV
TRIMGND SENSE-
Figure. 28. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 2000uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 25A to 50A step change (50% of full load), with an input voltage of 12V. Please contact your Lineage Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values or input voltages other than 12V. Table 2. General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations.
CO RTUNE CTUNE
1 x 47uF 2x47uF 330 330 330pF 560pF
4x47uF 330 1200pF
6x47uF 330 1800pF
10 x 47uF 20 x 47uF 270 270 2200pF 5600pF
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 29. Note that the airflow is parallel to the short axis of the module as shown in Figure 30. The derating data applies to airflow in either direction of the module's short axis.
25.4_ (1.0)
The thermal reference points, Tref used in the specifications is shown in Figure 30. For reliable operation the temperatures at this point should not o exceed 125 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note "Thermal Characterization Process For Open-Frame BoardMounted Power Modules" for a detailed discussion of thermal aspects including maximum device temperatures.
Wind Tunnel PWBs
Power Module
76.2_ (3.0)
x
Figure 30. Preferred airflow direction and location of hot-spot of the module (Tref).
12.7_ (0.50)
Probe Location for measuring airflow and ambient temperature
Air flow
Figure 29. Thermal Test Setup.
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Example Application Circuit
Requirements: Vin: 12V Vout: 1.8V Iout: 37.5A max., worst case load transient is from 25A to 37.5A Vout: Vin, ripple Vin+ 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (180mV, p-p) Vout+ VIN PGOOD SEQ + CI2 CI1 VOUT SENSE+ RTUNE + CTUNE ON/OFF TRIM+ RTrim TRIMGND SENSESENSECO1 CO2
MODULE
CI1 CI2 CO1 CO2 CTune RTune RTrim
4x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20) 200F/16V bulk electrolytic 5 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) 8 x 330F/6.3V Polymer (e.g. Sanyo Poscap) 47nF ceramic capacitor (can be 1206, 0805 or 0603 size) 220 ohms SMT resistor (can be 1206, 0805 or 0603 size) 12.7k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Mechanical Outline of Module
Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14
FUNCTION VIN GND VOUT VOUT GND VIN SEQ PGOOD ON/OFF VSVS+ +TRIM -TRIM SHARE
LINEAGE POWER 15
Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Mechanical Outline
Dimensions are in inches and (millimeters). Tolerances: x.xx in. 0.02 in. (x.x mm 0.5 mm) [unless otherwise indicated] x.xxx in 0.010 in. (x.xx mm 0.25 mm)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14
FUNCTION VIN GND VOUT VOUT GND VIN SEQ PGOOD ON/OFF VSVS+ +TRIM -TRIM SHARE
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Packaging Details
The Giga TLynxTM SMT modules are supplied in tape & reel as standard. Modules are shipped in quantities of 140 modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions
Outside diameter: Inside diameter: Tape Width: 330.2 (13.0) 177.8 (7.0) 56.0 (2.20)
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
contact Lineage Power for special manufacturing process instructions.
Surface Mount Information
Pick and Place
The Giga TLynxTM SMT modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow o temperatures of up to 300 C. The label also carries product information such as product code, serial number and location of manufacture.
Lead-free (Pb-free) Soldering
The -Z version Giga TLynx modules are lead-free
(Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the
instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). Recommended linear reflow profile using Sn/Ag/Cu solder:
300 250
Per J-STD-020 Rev. C
Peak Temp 260C Cooling Zone 4C/Second
Reflow Temp (C)
200 150 100 50 0
Heating Zone 1C/Second
* Min. Time Above 235C 15 Seconds *Time Above 217C 60 Seconds
Figure 31. Pick and Place Location.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and pick & placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 5 mm max.
Reflow Time (Seconds)
NOTE: Soldering outside of the recommended
profile requires testing to verify results and performance.
Tin Lead Soldering
The Giga TLynxTM SMT power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause
Bottom Side Assembly This module is not recommended for assembly on the bottom side of a customer board. If such an assembly is attempted, components may fall off the module during the second reflow process.
If assembly on the bottom side is planned, please
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than o o 235 C. Typically, the eutectic solder melts at 183 C, wets the land, and subsequently wicks the device connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures.
300
Figure 33. Time Limit Curve Above 205 C Reflow for Tin Lead (Sn/Pb) process.
o
MSL Rating
The Giga TLynxTM SMT modules have a MSL rating of 2.
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of <= 30C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity.
P eak Temp 235oC
250
REFLOW TEMP (C)
200
Heat zo ne max 4oCs -1
Co o ling zo ne 1 oCs -1 -4
150
100
So ak zo ne 30-240s P reheat zo ne max 4oCs -1
Tlim above 205oC
50
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001).
0
REFLOW TIME (S)
Figure 32. Reflow Profile for Tin/Lead (Sn/Pb) process.
240 235
MAX TEMP SOLDER (C)
230 225 220 215 210 205 200 0 10 20 30 40 50 60
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Data Sheet March 30, 2011
GigaTLynxTM SMT Non-isolated Power Modules: 4.5 - 14Vdc input; 0.7Vdc to 2.0Vdc, 50A Output
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 4. Device Codes
Device Code Input Voltage Range Output Voltage Output Current
On/Off Logic Negative
Sequencing
Comcodes
APTS050A0X3-SRPHZ Table 5. Coding Scheme TLynx family AP Sequencing feature. T
4.5 - 14Vdc
0.7 - 2.0Vdc
50A
Yes
CC109155314
Input voltage range S
Output current 050A0
Output voltage X
On/Off logic
Remote Sense 3
Options
ROHS Compliance Z
-SRP
T = with Seq.
S = 4.5 14V
50A
X= programmable output
No entry = negative 4= positive
3= Remote Sense
S= Surface Mount Z = ROHS6 R= Tape&Reel P= Paralleling
Asia-Pacific Headquarters Tel: +86.021.54279977*808 Europe, Middle-East and Africa Headquarters Tel: +49.89.878067-280
World Wide Headquarters Lineage Power Corporation 601 Shiloh Road, Plano, TX 75074, USA +1-888-LINEAGE(546-3243) (Outside U.S.A.: +1-972-244-WATT(9288)) www.lineagepower.com e-mail: techsupport1@lineagepower.com
India Headquarters Tel: +91.80.28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents. (c) 2011 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.
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