GE
Data Sheet
December 6, 2019 ©2012 General Electric Company. All rights reserved.
50A GigaTLynx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
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
TM
)
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.))
Wide operating temperature range [-40°C to 85°C(Regular)]
UL* 60950-1, 2
nd
Ed. Recognized, CSA
†
C22.2 No. 60950-1-07
Certified, and VDE
‡
(EN60950-1, 2
nd
Ed.) Licensed
ISO** 9001 and ISO 14001 certified manufacturing facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Industrial applications
Telecommunications equipment
Description
The GigaTLynx
TM
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 (V
IN
= 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 paralleling. The Tunable Loop
TM
feature, 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
Vout+
VIN
SENSE-
RTrim
VOUT
TRIM+
SENSE+
CTUNE
SEQ
RTUNE
TRIM-
+ CI2
V
in+
CO1
CI1
+CO2
ON/OFF
MODULE
GND
PGOOD
SHARE
SENSE-
RoHS Com
p
liant
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 2
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 Device Symbol Min Max Unit
Input Voltage All VIN -0.3 14 Vdc
Continuous
Sequencing pin voltage All VsEQ -0.3 4 Vdc
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage Vo,set ≤ 2.0 VIN 4.5
14 Vdc
Maximum Input Current All IIN,max Adc
(VIN= VIN, min to VIN, max, IO=IO, max )
26
Inrush Transient All I2 t 1 A2 s
Input No Load Current VO,set = 0.7Vdc IIN,No load 73.4 mA
(VIN = VIN, nom, Io = 0, module enabled) VO,set = 1.8Vdc IIN,No load 136 mA
Input Stand-by Current All IIN,stand-by 1.3 mA
(VIN = VIN, nom, module disabled)
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to VIN,
max, IO= IOmax ; See Test configuration section)
All 73 mAp-p
Input Ripple Rejection (120Hz) All 50 dB
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.
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point
(VIN=VIN,nom, IO=IO, nom, Tref=25°C) All VO, set -1.0 +1.0 % VO, set
Output Voltage All VO, set -2.0 +2.0 % VO, set
(Over all operating input voltage, resistive load, and
temperature conditions until end of life)
Adjustment Range All VO 0.7 2.0 Vdc
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All
5 mV
Load (IO=IO, min to IO, max) All
8 mV
Temperature (Tref=TA, min to TA, max) All
8 mV
Remote Sense Range All 0.5 Vdc
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//2x10μF ceramic capacitors)
Peak-to-Peak (5Hz to 20MHz bandwidth) All 50 mVpk-pk
External Capacitance 1
Without the Tunable LoopTM
ESR ≥ 1 mΩ All CO, max 1200 μF
ESR ≥ 10 mΩ All CO, max 10000 μF
With the Tunable Loop
ESR ≥ 1 mΩ All CO, max 20000 μF
ESR ≥ 10 mΩ All CO, max 20000 μF
Output Current All Io 0 50A Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 140 180 210 % Io
Output Short-Circuit Current All IO, s/c 3.0 5.5 8.5 Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO, set = 0.7Vdc η 80 81.1 %
VIN= 12V, TA=25°C VO,set = 1.2Vdc η 84.3 87.0 %
IO=IO, max , VO= VO,set V
O,set = 1.8Vdc η 87.3 90.1 %
Switching Frequency All fsw 247 260 273 kHz
General Specifications
Parameter Min Typ Max Unit
Telcordia Issue 2, Method I, Case 3, Calculated MTBF (IO=IO, max, TA=40°C) 4,755,661 Hours
Weight 12.80 (0.45) 14.22 (0.5) 15.64 (0.55) g (oz.)
1 External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best
transient response. See the Tunable LoopTM section for details.
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 4
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
On/Off Signal Interface
(VIN=VIN, min to VIN, max ; Signal referenced to GND
Negative Logic:
Logic High (Module OFF)
Input High Current All IIH 0.5 3.3 mA
Input High Voltage All VIH 3.0 VIN_ max V
Logic Low (Module ON)
Input Low Current All IIL 200 µA
Input Low Voltage All VIL -0.3 0.6 V
Turn-On Delay and Rise Times
(IO=IO, max , VIN = VIN, nom, TA = 25 oC, )
Case 1: On/Off input is set Logic Low (for Negative Logic module) or
On/Off input is set Logic High (for Positive Logic module)
The delay from the time input power is applied ( delay from instant at
which VIN = VIN_min until Vo = 10% of Vo,set)
All
Tdelay
3.0
4.8
7.0
msec
Case 2: Input Power is applied for at least one second and then
On/Off input is set to
Logic Low ( for Negative Logic Module) or
Logic High ( for Positive Logic Module)
The delay from the instant at which Von/off = 0.3V until Vo = 10% of
Vo,set
All
Tdelay
3.0
4.8
7.0
msec
Output Voltage Rise Time ( time for Vo to rise from 10% of Vo,set to
90% of Vo,set
All
Trise
2.0
3.6
4.2
msec
Output voltage overshoot – Startup
3 % of Vset
Over Temperature Protection All Tref 125 °C
(See Thermal Consideration section)
Sequencing Slew rate capability All dVSEQ/dt — 2 V/msec
(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) All TsEQ-delay 10 msec
Tracking Accuracy Power-up (2V/ms) All VSEQ –Vo 200 400 mV
Power-down (1V/ms) VSEQ –Vo 100 200 mV
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 5
Feature Specifications (Continued)
Parameter Device Symbol Min Typ Max Unit
Input Undervoltage Lockout
Turn-on Threshold All 4.01 4.26 4.6 V
Turn-off Threshold All 3.9 4.04 4.4 V
Hysteresis All
0.1 0.22 0.65 Vdc
Forced Load Share Accuracy All 10 % Io
Number of units in Parallel All 5
PGOOD (Power Good)
Internal pull-up, VPGOOD All
5 V
Overvoltage threshold for PGOOD All 112.5 %VO, set
Undervoltage threshold for PGOOD All 87.5 %VO, set
GE
Data Sheet
50A Gi
g
aTL
y
nx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 6
The following figures provide typical characteristics for the 12V Giga TLynx
TM
50A at 0.7Vo and at 25
o
C
Characteristic Curves
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, I
O
(A) AMBIENT TEMPERATURE, T
A
O
C
Figure 1. Converter Efficiency versus Output Current. Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
V
O
(V) (10mV/div)
OUTPUT CURRENT OUTPUT VOLTAGE
I
O
(A) (20Adiv) V
O
(V) (10mV/div)
TIME, t (1s/div) TIME, t (0.2ms /div)
Figure 3. Typical output ripple and noise (V
IN
= 12V, I
o
= I
o,max
). Figure 4. Transient Response to Dynamic Load
Change from 50%
to 100% at 12Vin, Cext =5x47uF+
+22x330uFpolymer,CTune=330nF,RTune=100ohms
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
O
(V) (200mV/div) V
ON/OFF
(V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
O
(V) (200mV/div) V
IN
(V) (5V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (I
o
= I
o,max
). Figure 6. Typical Start-up Using Input Voltage (V
IN
= 12V, I
o
=
I
o,max
).
70
75
80
85
90
95
0 1020304050
Vin=4.5V
Vin=12V
Vin=14V
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 7
The following figures provide typical characteristics for the 12V Giga TLynxTM 50A at 1.2 Vo and at 25o
Characteristic Curves
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 7. Converter Efficiency versus Output Current. Figure 8. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
(20Adiv) 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).
Figure 10. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cext =5x47uF+
+13x330uFpolymer,CTune=120nF,RTune=180ohms
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO (V) (500mV/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (500mV/div) VIN (V) (5V/div)
TIME, t (2 ms/div) TIME, t (2 ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io =
Io,max).
70
75
80
85
90
95
0 1020304050
Vin=4.5V
Vin=12V
Vin=14V
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 8
The following figures provide typical characteristics for the 12V Giga TLynxTM 50A at 1.8 Vo and at 25oC.
Characteristic Curves
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA OC
Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
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
OUTPUT VOLTAGE ON/OFF VOLTAGE
VO(V) (500mV/div) VON/OFF (V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (500mV/div) VIN (V) (5V/div)
TIME, t (2 ms/div) TIME, t (2 ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max). Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io =
Io,max).
70
75
80
85
90
95
100
0 1020304050
Vin=12V
Vin=4.5V
Vin=14V
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 9
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1μH
BATTERY
CS 1000μF
Electrolytic
E.S.R.<0.1
@ 20°C 100kHz
2x100μF
Tantalum
VIN(+)
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
CIN
Figure 19. Input Reflected Ripple Current Test Setup.
NOTE: All voltage measurements to be t aken at the modu le
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.
Vo+
COM
0.1uF
RESISTIVE
LOAD
SCOPE U SING
BNC SOCKET
COPPER STRIP
GROUND PLANE
10uF
Figure 20. Output Ripple and Noise Test Setup.
VO
COM
VIN(+)
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN VO
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
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
The Giga TLynxTM 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 µF or 4x22 µF or 4x47 µF
ceramic capacitors and an input of 12V.
Input Ripple Voltage (mVp-p)
Output Voltage (Vdc)
Figure 22. Input ripple voltage for various output voltages
with 2x22 µF, 4x22 µF or 4x47 µF ceramic capacitors at the
input (maximum load). Input voltage is 12V
Output Filtering
The Giga TLynxTM modules are designed for low output ripple
voltage and will meet the maximum output ripple specification
with 0.1 µF ceramic and 10 µF 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.
50
75
100
125
150
175
200
225
250
11.251.51.752
2x22uF
4x22uF
4x47uF
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 10
Feature Descriptions
Figure 23. Output ripple voltage for various output voltages
with external 2x10 µF, 2x47 µF, 4x47 µF or 8x47 µF ceramic
capacitors at the output (50A load). Input voltage is 12V.
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):2009-11; 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.
Remote On/Off
The GigaTLynxTM SMT power modules feature a On/Off pin for
remote On/Off operation. With the available Negative Logic
On/Off feature, (no device code suffix, see Ordering
Information), the module turns OFF during logic High and ON
during logic Low. The On/Off signal is always referenced to
ground. 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.
On/Off circuit configuration is shown in Fig. 24. The On/Off pin
should be pulled high with an external pull-up resistor
(suggested value for the 4.5V to 14V input range is 20Kohms).
When transistor Q2 is in the OFF state, the On/Off pin is pulled
high, transistor Q1 is turned ON and the module is OFF. To turn
the module ON, Q2 is turned ON pulling the On/Off pin low,
turning transistor Q1 OFF resulting in the internal UVLO pin
going high and turning on the module.
Figure 24. Circuit configuration for using negative On/Off
logic.
During a Logic High on the On/Off pin (transistor Q2 is OFF), the
module remains OFF. The external resistor R3 should be chosen
to maintain 1.0V minimum on the On/Off pin to ensure that the
module is OFF when transistor Q2 is in the OFF state. Suitable
value for R3 is 12.1K. During Logic-Low when Q2 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 modules, the output
start-up can be synchronized (please refer to characterization
curves).
Overcurrent Protection
To provide protection in a fault (output overload) condition, the
unit is 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.
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped
with a thermal shutdown circuit. The unit will shutdown if the
overtemperature threshold of 125oC 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.
0
10
20
30
40
50
60
70
80
0.6 0.8 1 1.2 1.4 1.6 1.8 2
Ripple (mVp-p)
Output V o l tage(Vo l ts)
2x10uF Ext Cap
2x47uF Ext Cap
4x47uF Ext Cap
8x47uF Ext Cap
R3
UVLO
ON/OFF
MODULE
VIN+
GND
5.11KQ2
5.11K Q1
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 11
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 GigaTLynxTM 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:
7.0
14000
Vo
Rtrim
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.
Table 1
VO, set (V) Rtrim (KΩ)
0.7 Open
1.0 46.6
1.2 28
1.5 17.5
1.8 12.7
V
O
(+)
TRIM+
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Vout
TRIM
Figure 25. Circuit configuration to program output voltage
using an external resistor.
Remote Sense
The GigaTLynxTM 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.
Voltage Margining
Output voltage margining can be implemented in the Giga
TLynxTM 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
The Giga TLynxTM modules have monotonic start-up and
shutdown behavior for any combination of rated input voltage,
output current and operating temperature range.
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 12
Startup into Pre-biased Output
The Giga TLynxTM 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.
Figure 26. Circuit Configuration for margining Output
voltage.
Output Voltage Sequencing
Figure 27. Circuit showing connection of the sequencing
signal to the SEQ pin.
The Giga TLynxTM modules include a sequencing feature, EZ-
SEQUENCETM 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.
During the delay time, the SEQ pin should be held close to
ground (nominally 50mV ± 20 mV). This is required to keep the
internal op-amp out of saturation thus preventing output
overshoot during the start of the sequencing ramp. The
resistor R1 (see fig. 27) has been designed into the module to
achieve 50mV ± 20mV at the inverting input, and is calculated
according to the following equation
05.0
24950
1
VREG
R ohms,
The voltage at the sequencing pin will be 50mV when the
sequencing signal is at zero. The VREG is generated inside the
module with a nominal value of 5.1V.
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 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.
When using the EZ-SEQUENCETM 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
start-up is required, the EZ-SEQUENCETM feature must be
disabled. For additional guidelines on using the EZ-
SEQUENCETM feature please contact the Lineage Power
technical representative for additional information.
V
o
MODULE
TRIM–
TRIM+
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
5.11K
R1
MODULE
499K + OUT
_
10K
SEQ
VREG
GND
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 13
Active Load Sharing (-P Option)
For additional power requirements, the Giga TLynxTM 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
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 90% of the
sum of the individual converters. As an example, for a
system of four Giga TLynxTM converters in parallel, the total
current drawn should be less that 90% of (4 x 50A) , i.e. less
than 180A.
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 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.
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. Additional
external drive capability can be provided to the PGOOD
terminal by using a source less than 5V and a suitable pull-up
resistor to keep the overall external current below 4.5mA
Tunable Loop
The Giga TLynxTM modules have a new feature that optimizes
transient response of the module called Tunable LoopTM.
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 LoopTM 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.
Figure. 28. Circuit diagram showing connection of RTUNE 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
RTUNE
GND
TRIM+
MODULE
TRIM-
RTrim
SENSE+
CO1
SENSE-
VOUT
CTUNE
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 14
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.
Table 3. Recommended values of RTUNE and CTUNE to obtain
transient deviation of 2% of Vout for a 25A step load with
Vin=12V.
C
O
1 x 47uF 2x47uF 4x47uF 6x47uF 10 x 47u
F
20 x 47uF
R
TUNE
330 330 330 330 270 270
C
TUNE
330pF 560pF 1200pF 1800pF 2200pF 5600pF
V
O
1.8V 1.2V 0.7V
C
O
5x47uF +
8x330uF
polymer
5x47uF +
13x330uF
polymer
5x47uF +
22x330uF
polymer
R
TUNE
220 180 100
C
TUNE
47nF 120nF 330nF
V
35mV 23mV 14mV
GE
Data Sheet
50A Gi
g
aTL
y
nx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 15
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.
The thermal reference points, T
ref
used in the specifications is
shown in Figure 30. For reliable operation the temperatures at
this point should not exceed 125
o
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 Board-Mounted Power Modules” for a
detailed discussion of thermal aspects including maximum
device temperatures.
Figure 30. Preferred airflow direction and location of hot-
spot of the module (Tref).
Figure 29. Thermal Test Setup.
A
i
r
flow
x
Power Module
W
ind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 16
Example Application Circuit
Requirements:
Vin: 12V
Vout: 1.8V
Iout: 37.5A max., worst case load transient is from 25A to 37.5A
Vout: 1.5% of Vout (27mV) for worst case load transient
Vin, ripple 1.5% of Vin (180mV, p-p)
CI1 4x22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)
CI2 200F/16V bulk electrolytic
CO1 5 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)
CO2 8 x 330F/6.3V Polymer (e.g. Sanyo Poscap)
CTune 47nF ceramic capacitor (can be 1206, 0805 or 0603 size)
RTune 220 ohms SMT resistor (can be 1206, 0805 or 0603 size)
RTrim 12.7k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Vout+
V
IN
SENSE-
RTrim
VOUT
TRIM+
SENSE+
CTUNE
SEQ
RTUNE
TRIM-
+ CI2
Vin+
CO1
CI1
+CO2
ON/OFF
MODULE
GND
PGOOD
SHARE
SENSE-
GE
Data Sheet
50A Gi
g
aTL
y
nx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 17
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 FUNCTION
1 VIN
2 GND
3 VOUT
4 VOUT
5 GND
6 VIN
7 SEQ
8 PGOOD
9 ON/OFF
10 VS-
11 VS+
12 +TRIM
13 –TRIM
14 SHARE
GE
Data Sheet
50A Gi
g
aTL
y
nx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 18
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 FUNCTION
1 VIN
2 GND
3 VOUT
4 VOUT
5 GND
6 VIN
7 SEQ
8 PGOOD
9 ON/OFF
10 VS-
11 VS+
12 +TRIM
13 –TRIM
14 SHARE
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
LINEAGE POWER 19
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: 330.2 (13.0)
Inside diameter: 177.8 (7.0)
Tape Width: 56.0 (2.20)
GE
Data Sheet
50A Gi
g
aTL
y
nx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 20
Surface Mount Information
Pick and Place
The Giga TLynx
TM
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 temperatures of up to 300
o
C. The label
also carries product information such as product code, serial
number and location of manufacture.
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.
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 contact Lineage Power for
special manufacturing process instructions.
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 5-2). The suggested Pb-
free solder paste is Sn/Ag/Cu (SAC).
Recommended linear reflow profile using Sn/Ag/Cu
solder:
NOTE: Soldering outside of the recommended profile
requires testing to verify results and performance.
Tin Lead Soldering
The Giga TLynx
TM
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 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 235
o
C.
Typically, the eutectic solder melts at 183
o
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
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
December 6, 2019 ©2012 General Electric Company. All rights reserved. Page 21
accurately measuring the modules CP connector
temperatures.
REFLOW TEMP (C)
REFLOW TIME (S)
Figure 32. Reflow Profile for Tin/Lead (Sn/Pb) process.
MAX TEMP SOLDER (C)
Figure 33. Time Limit Curve Above 205oC Reflow for
Tin Lead (Sn/Pb) process.
MSL Rating
The Giga TLynxTM SMT modules have a MSL rating of 2a.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount packages
is detailed in J-STD-033 Rev. B (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 <= 30°C 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.
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
50
10 0
15 0
200
250
300
Preheat zone
max 4
o
Cs
-1
Soak zone
30-240s
Heat zone
max 4
o
Cs
-1
Peak Temp 235
o
C
Co o ling
zo ne
1- 4
o
Cs
-1
T
lim
above
205
o
C
200
205
210
215
220
225
230
235
240
0 102030405060
GE Data Sheet
50A Gi
g
aTL
y
nxTM: Non-Isolated DC-DC Power Modules
4.5Vdc –14Vdc input; 0.7Vdc to 2.0Vdc output; 50A Output Current
Contact Us
For more information, call us at
USA/Canada:
+1 888 546 3243, or +1 972 244 9288
Asia-Pacific:
+86.021.54279977*808
Europe, Middle-East and Africa:
+49.89.878067-280
www.gecriticalpower.com
GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and 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.
December 6, 2019 ©2018 General Electric Company. All International rights reserved. Version 1.4
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 6. Device Codes
Device Code
Input
Voltage
Range
Output
Voltage
Output
Current
On/Off
Logic Sequencing Comcodes
APTS050A0X3-SRPHZ 4.5 – 14Vdc 0.7 – 2.0Vdc 50A Negative Yes CC109155314
Table 7. Coding Scheme
TLynx
family
Sequencing
feature.
Input
voltage
range
Output
current
Output
voltage
On/Off
logic
Remote
Sense
Options ROHS
Compliance
AP T S 050A0 X 3 -SRPH Z
T = with Seq.
S = 4.5 -
14V
50A X =
programma
ble output
No entry =
negative
4 = positive
3 =
Remote
Sense
S = Surface
Mount
R = Tape&Reel
P = Paralleling
H=2 ground pins
Z = ROHS6
