GE Data Sheet
May 8, 2013 ©2013 General Electric Company. All rights reserved.
12V AustinLynxTM 10A: Non-Isolated DC-DC Power Module,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A 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)
Delivers up to 10A of output current
High efficiency – 93% at 3.3V full load (VIN = 12.0V)
Small size and low profile:
33.00 mm x 13.46 mm x 8.28 mm
(1.300 in x 0.530 in x 0.326 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 4.4 M hours at 25oC Full-load
Output voltage programmable from 0.75 Vdc to 5.5 Vdc
via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4% (typical)
Remote On/Off
Remote Sense
Output overcurrent protection (non-latching)
Overtemperature protection
Wide operating temperature range (-40°C to 85°C)
UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-03
Certified, and VDE‡ 0805:2001-12 (EN60950-1) Licensed
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Description
The 12V Austin LynxTM Programmable SMT (surface mount technology) power modules are non-isolated DC-DC converters that
can deliver up to 10A of output current with full load efficiency of 93% at 3.3V output. These modules provide a precisely regulated
output voltage programmable via an external resistor from 0.75Vdc to 5.5Vdc over a wide range of input voltage (VIN = 10 – 14Vdc).
Their open-frame construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard
features include remote On/Off, remote sense, output voltage adjustment, overcurrent and overtemperature protection.
* 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
RoHS Compliant
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 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 15 Vdc
Continuous
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 All VIN 10 12.0 14.0 Vdc
Maximum Input Current All IIN,max 6.5 Adc
(VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc)
Input No Load Current VO,set = 0.75 Vdc IIN,No load 40 mA
(VIN = 12.0Vdc, IO = 0, module enabled) VO,set = 3.3Vdc IIN,No load 100 mA
Input Stand-by Current All IIN,stand-by 2.0 mA
(VIN = 12.0Vdc, module disabled)
Inrush Transient All I2t 0.4 A2s
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 20 mAp-p
Input Ripple Rejection (120Hz) All 30 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 being part of a
complex 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 fast-acting fuse with a maximum rating of 15 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
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All VO, set –2.0 ⎯ +2.0 % VO, set
(VIN=IN, min, IO=IO, max, TA=25°C)
Output Voltage All VO, set –2.5% ⎯ +3.5% % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO 0.7525 5.5 % VO, set
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All
⎯ 0.3 % VO, set
Load (IO=IO, min to IO, max) All
⎯ 0.4 % VO, set
Temperature (Tref=TA, min to TA, max) All
⎯ 0.4 % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//10μFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All ⎯ 12 15 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 30 50 mVpk-pk
External Capacitance
ESR ≥ 1 mΩ All CO, max ⎯ ⎯ 1000 μF
ESR ≥ 10 mΩ All CO, max ⎯ ⎯ 5000 μF
Output Current All Io 0 ⎯ 10 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim ⎯ 200 ⎯ % Io
Output Short-Circuit Current All IO, s/c ⎯ 3 ⎯ Adc
(VO≤250mV) ( Hiccup Mode )
Efficiency VO, set = 0.75Vdc η 81.0 %
VIN= VIN, nom, TA=25°C VO, set = 1.2Vdc η 87.5 %
IO=IO, max , VO= VO,set V
O,set = 1.5Vdc η 89.0 %
V
O,set = 1.8Vdc η 90.0 %
V
O,set = 2.5Vdc η 92.0 %
V
O,set = 3.3Vdc η 93.0 %
V
O,set = 5.0Vdc η 95.0 %
Switching Frequency All fsw ⎯ 300 ⎯ kHz
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 200 ⎯ mV
Load Change from Io= 50% to 100% of Io,max;
1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 200 ⎯ mV
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 4
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C) All Vpk ⎯ 100 ⎯ mV
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C) All Vpk ⎯ 100 ⎯ mV
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation) All ts ⎯ 25 ⎯ μs
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=IO, max, TA=25°C) 4,400,000 Hours
Weight ⎯ 5.6 (0.2) ⎯ g (oz.)
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 5
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
Remote On/Off Signal interface
(VIN=VIN, min to VIN, max; Open collector npn or equivalent
Compatible, Von/off signal referenced to GND
See feature description section)
Logic High (On/Off Voltage pin open - Module ON)
Von/Off All VIH — — VIN V
Ion/Off All IIH — — 10 μA
Logic Low (Von/Off ≤ 0.3V – Module Off)
Von/Off All VIL — — 0.3 V
Ion/off All IIL — — 1 mA
Turn-On Delay and Rise Times
(IO=IO, max , VIN = VIN, nom, TA = 25 oC, )
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)
All Tdelay 3 msec
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)
All Tdelay 3 msec
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
All Trise — 4 6 msec
Output voltage overshoot – Startup — 1 % VO, set
IO= IO, max; VIN = 10.0 to 14Vdc, TA = 25 oC
Remote Sense Range All — — 0.5 V
Overtemperature Protection All Tref ⎯ 125 ⎯ °C
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold All ⎯ 8.2 ⎯ V
Turn-off Threshold All ⎯ 8.0 ⎯ V
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
GE 6
Characteristic Curves
The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC.
EFFICIENCY, η (%)
70
72
74
76
78
80
82
84
86
88
90
02 46 810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
74
76
78
80
82
84
86
88
90
92
94
0246810
Vin=14V
Vin=10V
Vin=12V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current (Vout
=1.2Vdc).
Figure 4. Converter Efficiency versus Output Current (Vout =
2.5Vdc).
EFFICIENCY, η (%)
74
76
78
80
82
84
86
88
90
92
02 46 810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
77
79
81
83
85
87
89
91
93
95
0246810
Vin=14V
Vin=10V
Vin=12V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current (Vout =
1.5Vdc).
Figure 5. Converter Efficiency versus Output Current (Vout =
3.3Vdc).
EFFICIENCY, η (%)
76
78
80
82
84
86
88
90
92
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
78
80
82
84
86
88
90
92
94
96
0246810
Vin=14V
Vin=10V
Vin=12V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure3. Converter Efficiency versus Output Current (Vout =
1.8Vdc).
Figure 6. Converter Efficiency versus Output Current (Vout =
5.0Vdc).
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC.
INPUT CURRENT, IIN (A)
0
1
2
3
4
5
6
7 8 91011121314
Io = 10 A
Io =5A
Io =0 A
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/div)
INPUT VOLTAGE, VIN (V) TIME
,
t
(
5
μ
s/div
)
Figure 7. Input voltage vs. Input Current
(Vout = 3.3Vdc).
Figure 10. Transient Response to Dynamic Load Change from
50% to 100% of full load (Vo = 3.3Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/div)
TIME, t (2μs/div) TIME, t (5 μs/div)
Figure 8. Typical Output Ripple and Noise
(Vin = 12.0V dc, Vo = 2.5 Vdc, Io=10A).
Figure 11. Transient Response to Dynamic Load Change from
100% to 50% of full load (Vo = 3.3 Vdc).
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
TIME, t (2μs/div) TIME, t (10μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 12.0V dc, Vo = 5.0 Vdc, Io=10A).
Figure 12. Transient Response to Dynamic Load Change from
50% to 100% of full load (Vo = 3.3 Vdc, Cext = 2x150 μF
Polymer Capacitors).
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the 12V Austin Lynx Programmable SMT modules at 25ºC.
OUTPUT CURRENT, OUTPUTVOLTAGE
IO (A) (2A/div) VO (V) (100mV/div)
OUTPUT VOLTAGE INPUT VOLTAGE
Vo (V) (2V/div) VIN (V) (5V/div)
TIME, t (10μs/div) TIME, t (2 ms/div)
Figure 13. Transient Response to Dynamic Load Change
from 100% of 50% full load (Vo = 5.0 Vdc, Cext = 2x150 μF
Pol
y
mer Ca
p
acitors).
Figure 16. Typical Start-Up with application of Vin with low-
ESR polymer capacitors at the output (7x150 μF) (Vin = 12Vdc,
Vo = 5.0Vdc
,
Io = 10A
,
Co = 1050
μ
F).
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (5V/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
TIME, t (1 ms/div) TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Of
f
(Vin =
12.0Vdc, Vo = 5.0Vdc, Io = 10.0A).
Figure 17 Typical Start-Up Using Remote On/Off with Prebias
(Vin = 12.0Vdc, Vo = 2.5Vdc, Io = 1.0A, Vbias =1.2Vdc).
OUTPUT VOLTAGE On/Off VOLTAGE
VO (1V/div) VOn/off (V) (5V/div)
OUTPUT CURRENT,
IO (A) (10A/div)
TIME, t (1 ms/div) TIME, t (10ms/div)
Figure 15. Typical Start-Up Using Remote On/Off with Low-
ESR external capacitors (Co= 5000μF) (Vin = 12.0Vdc, Vo =
5.0Vdc, Io = 10.0A, Co = 1050μF).
Figure 18. Output short circuit Current (Vin = 12.0Vdc, Vo =
0.75Vdc).
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the 12V Austin Lynx Programmable SMT modules.
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC
Figure 19. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12.0 Vdc, Vo=0.75Vdc).
Figure 22. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12.0 Vdc, Vo=5.0 Vdc).
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
AMBIENT TEMPERATURE, TA OC
Figure 20. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12.0Vdc, Vo=1.8 Vdc).
OUTPUT CURRENT, Io (A)
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
100 LFM
200 LFM
NC
300 LFM
400 LFM
AMBIENT TEMPERATURE, TA OC
Figure 21. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12.0Vdc, Vo=3.3 Vdc).
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 10
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
1μH
BATTERY
CS 1000μF
Electrolytic
E.S.R.<0.1Ω
@ 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 23. Input Reflected Ripple Current Test Setup.
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.
V
O
(+)
COM
1uF .
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
Figure 24. 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 25. Output Voltage and Efficiency Test Setup.
η =
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filtering
The 12V Austin Lynx Programmable SMT 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.
In a typical application, 4x47 µF low-ESR tantalum capacitors
(AVX part #: TPSE476M025R0100, 47µF 25V 100 mΩ ESR
tantalum capacitor) will be sufficient to provide adequate ripple
voltage at the input of the module. To minimize ripple voltage
at the input, low ESR ceramic capacitors are recommended at
the input of the module. Figure 26 shows input ripple voltage
(mVp-p) for various outputs with 4x47 µF tantalum capacitors
and with 4x22 µF ceramic capacitor (TDK part #:
C4532X5R1C226M) at full load.
Input Ripple Voltage (mVp-p)
0
50
10 0
150
200
250
300
0123456
Tantalum
Cer amic
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output with 4x22
µF polymer and 4x47 µF ceramic capacitors at the input (full
load).
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 11
Design Considerations (continued)
Output Filtering
The 12V Austin Lynx Programmable SMT module is designed for
low output ripple voltage and will meet the maximum output
ripple specification with 1 µF ceramic and 10 µF tantalum
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.
For stable operation of the module, limit the capacitance to less
than the maximum output capacitance as specified in the
electrical specification table.
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, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12
(EN60950-1) Licensed.
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 fast-acting
fuse with a maximum rating of 15A in the positive input lead.
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 12
Feature Description
Remote On/Off
The 12V Austin Lynx Programmable SMT power modules
feature an On/Off pin for remote On/Off operation. If not using
the remote On/Off pin, leave the pin open (module will be On).
The On/Off pin signal (Von/Off) is referenced to ground. To
switch the module on and off using remote On/Off, connect an
open collector npn transistor between the On/Off pin and the
ground pin (See Figure 27).
During a logic-high (On/Off pin is pulled high internal to the
module) when the transistor is in the Off state, the power
module is ON. The maximum allowable leakage current of the
transistor when Von/off = VIN,max is 10µA. During a logic-low
when the transistor is turned-on, the power module is OFF.
During this state VOn/Off is less than 0.3V and the maximum
IOn/Off = 1mA.
Q1
R2
R1
Q2
R3
R4
Q3 CSS
GND
VIN+
ON/OFF
PWM Enable
+
_
ON/OFF
V
ION/OFF
MODULE
Figure 27. Remote On/Off Implementation.
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
operates normally once the output current is brought back into
its specified range. The typical average output current during
hiccup is 3 A.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit,
module operation is disabled. The module will begin to operate
at an input voltage above the undervoltage lockout turn-on
threshold.
Overtemperature Protection
To provide over temperature protection in a fault condition, the
unit relies upon the thermal protection feature of the controller
IC. The unit will shutdown if the thermal reference point Tref,
exceeds 125oC (typical), but the thermal shutdown is not
intended as a guarantee that the unit will survive temperatures
beyond its rating. The module will automatically restart after it
cools down.
Output Voltage Programming
The output voltage of the 12V Austin Lynx Programmable SMT
module can be programmed to any voltage from 0.75Vdc to
5.5Vdc by connecting a resistor (shown as Rtrim in Figure 28)
between Trim and GND pins of the module. Without an
external resistor between Trim and GND pins, the output of the
module will be 0.7525Vdc. To calculate the value of the trim
resistor, Rtrim for a desired output voltage, use the following
equation:
Ω
−
−
=1000
7525.0
10500
Vo
Rtrim
For example, to program the output voltage of the 12V Austin
Lynx Programmable SMT module to 1.8 Vdc, Rtrim is calculated
is follows:
−
−
=1000
75.08.1
10500
Rtrim
Ω= kRtrim 024.9
VO(+)
TRIM
GND
R
trim
LOAD
VIN(+)
ON/OFF
Vout
Figure 28. Circuit configuration for programming output
voltage using an external resistor.
Table 1 provides Rtrim values required for some common
output voltages
Table 1
VO, set (V) Rtrim (KΩ)
0.7525 Open
1.2 22.46
1.5 13.05
1.8 9.024
2.5 5.009
3.3 3.122
5.0 1.472
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 13
Feature Descriptions (continued)
By using a 1% tolerance trim resistor, set point tolerance of
±2% is achieved as specified in the electrical specification. 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.
The amount of power delivered by the module is defined as the
voltage at the output terminals multiplied by the output current.
When using the trim feature, the output voltage of the module
can be increased, which at the same output current would
increase the power output of the module. Care should be taken
to ensure that the maximum output power of the module
remains at or below the maximum rated power (Pmax = Vo,set x
Io,max).
Remote Sense
The 12V Austin Lynx Programmable SMT power modules have a
Remote Sense feature to minimize the effects of distribution
losses by regulating the voltage at the Remote Sense and GND
pins (See Figure 29). The voltage between the Sense pin and Vo
pin must not exceed 0.5V. Although both the Remote Sense
and the TRIM features can increase the output voltage Vo, the
maximum increase is not the sum of both. The maximum Vo
increase is the larger of either the Remote Sense or TRIM.
The amount of power delivered by the module is defined as the
output voltage multiplied by the output current (Vo x Io). When
using Remote Sense and/or TRIM, the output voltage of the
module can increase, which if the same output is maintained,
increases the power output by the module. Make sure that the
maximum output power of the module remains at or below the
maximum rated power. When the Remote Sense feature is not
being used, leave the Remote Sense pin unconnected.
VO
COM
VIN(+)
COM
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
Sense
Figure 29. Remote sense circuit configuration
Voltage Margining
Output voltage margining can be implemented in the 12V
Austin Lynx Programmable SMT modules by connecting a
resistor, Rmargin-up, from Trim pin to ground pin for margining-
up the output voltage and by connecting a resistor, Rmargin-
down, from Trim pin to Output pin. Figure 30 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 GE technical
representative for additional details
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 30. Circuit Configuration for margining Output
voltage.
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 14
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 32. Note that the airflow is
parallel to the short axis of the module as shown in figure 31.
The derating data applies to airflow in either direction of the
module’s short axis.
Air Flow
Tref
Top View
Figure 31. Tref Temperature measurement location.
The thermal reference point, Tref used in the specifications is
shown in Figure 31. For reliable operation this temperature
should not exceed 115oC.
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 32. Thermal Test Set-up.
Heat Transfer via Convection
Increased airflow over the module enhances the heat transfer
via convection. Thermal derating curves showing the
maximum output current that can be delivered at different
local ambient temperatures (TA) for airflow conditions ranging
from natural convection and up to 2m/s (400 ft./min) are
shown in the Characteristics Curves section.
A
i
r
flow
x
Po w e r M o d u le
ind Tunne l
PWBs
8.3_
(0.325)
76.2_
(3.0)
Pro b e Lo c a t io n
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 15
Mechanical Outline
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.)
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 16
Recommended Pad Layout
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.)
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 17
Packaging Details
The 12V Austin Lynx Programmable SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 250
modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions: 330.2 mm (13.00)
Inside Dimensions: 177.8 mm (7.00”)
Tape Width: 44.00 mm (1.732”)
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 18
Surface Mount Information
Pick and Place
The 12V Austin Lynx Programmable 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 300oC. The
label also carries product information such as product code,
serial number and the location of manufacture.
Figure 33. 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 placement speed should be considered to
optimize this process. The minimum recommended nozzle
diameter for reliable operation is 6mm. The maximum nozzle
outer diameter, which will safely fit within the allowable
component spacing, is 9 mm.
Oblong or oval nozzles up to 11 x 9 mm may also be used
within the space available.
Tin Lead Soldering
The Austin LynxTM 12 V 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 235oC.
Typically, the eutectic solder melts at 183oC, 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.
REFLOW TEMP (°C)
0
50
10 0
15 0
200
250
300
Preheat zone
max 4
o
Cs
-1
So ak zone
30-240s
Heat zone
max 4
o
Cs
-1
Peak Temp 235
o
C
Coo ling
zo ne
1- 4
o
Cs
-1
T
lim
above
205
o
C
REFLOW TIME (S)
Figure 34. Reflow Profile for Tin/Lead (Sn/Pb) process.
MAX TEMP SOLDER (°C)
200
205
210
215
220
225
230
235
240
0 102030405060
Figure 35. Time Limit Curve Above 205oC for Tin/Lead
(Sn/Pb) process.
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A Output Current
May 8, 2013 ©2013 General Electric Company. All rights reserved. Page 19
Surface Mount Information (continued)
Lead Free Soldering
The –Z version 12V Austin Lynx Programmable SMT 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). The recommended linear reflow profile using
Sn/Ag/Cu solder is shown in Fig. 36.
MSL Rating
The 12V Austin Lynx Programmable 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. 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 ≤ 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).
Per J-STD-020 Rev. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Reflow Temp (°C)
Heating Zone
1°C/Se cond
Peak Temp 260°C
* Min. Time Above 235°C
15 Seconds
*Time Above 217°C
60 Seconds
Cooling
Zone
Figure 36. Recommended linear reflow profile using
Sn/Ag/Cu solder.
GE Data Sheet
12V AustinLynxTM10A: Non-Isolated DC-DC Power Modules,Programmable
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 10A 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:
+49.89.74423-206
India:
+91.80.28411633
www.ge.com/powerelectronics
May 8, 2013 ©2013 General Electric Company. All rights reserved. Version 1.44
Ordering Information
Please contact your GE Sales Representative for pricing, availability and optional features.
Table 2. Device Codes
Device Code Input
Voltage
Output
Voltage
Output
Current Efficiency Connector
Type Comcodes
AXA010A0X3-SR 10 – 14Vdc 0.75 – 5.5 V 10 A 93% SMT 108970138
AXA010A0X3-SRZ 10 – 14Vdc 0.75 – 5.5 V 10 A 93% SMT CC109101326
-Z refers to RoHS-compliant versions