GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Module
10Vdc – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 5A Output Current
RoHS Compliant
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
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 5A output current
High efficiency – 89% at 3.3V full load (V
Small size and low profile:
20.3 mm x 11.4 mm x 7.24 mm
(0.8 in x 0.45 in x 0.285 in)
Low output ripple and noise
High Reliability:
Calculated MTBF = 5.6M hours at 25
Output voltage programmable from 0.75 Vdc to 5.5Vdc
via external resistor
Line Regulation: 0.3% (typical)
Load Regulation: 0.4% (typical)
Temperature Regulation: 0.4 % (typical)
Remote On/Off
Output overcurrent protection (non-latching)
Wide operating temperature range (-40°C to 85°C)
†
UL* 60950-1Recognized, CSA
Certified, and VDE
ISO** 9001 and ISO 14001 certified manufacturing
facilities
‡
0805:2001-12 (EN60950-1) Licensed
C22.2 No. 60950-1-03
= 12.0V)
IN
o
C Full-load
Description
Austin MicroLynxTM 12Vdc SMT (surface mount technology) power modules are non-isolated dc-dc converters that can deliver up
to 5A of output current with full load efficiency of 89% at 3.3V output. These modules provide precisely regulated output voltage
programmable via external resistor from 0.75Vdc to 5.5Vdc over a wide range of input voltage (V
construction and small footprint enable designers to develop cost- and space-efficient solutions. Standard features include
remote On/Off, programmable output voltage and overcurrent 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
May 6, 2013 ©2013 General Electric Company. All rights reserved.
= 10 - 14V). Their open-frame
IN
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
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 V
Continuous
Operating Ambient Temperature All T
IN
A
(see Thermal Considerations section)
Storage Temperature All T
stg
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 14 Vdc
Maximum Input Current All I
(VIN= V
Input No Load Current V
IN, min
to V
IN, max
, IO=I
)
O, max
= 0.75 Vdc I
O,set
IN,max
IN,No load
-0.3 15 Vdc
-40 85 °C
-55 125 °C
3.5 Adc
17 mA
(VIN = V
Input Stand-by Current All I
(VIN = V
, Io = 0, module enabled) V
IN, nom
, module disabled)
IN, nom
= 5.0Vdc I
O,set
IN,No load
IN,stand-by
100 mA
1.2 mA
Inrush Transient All I2t 0.4 A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; V
IO= I
max,
; See Test configuration section)
Omax
IN, min
to V
IN,
All 30 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 6 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.
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 2
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point All V
(VIN=
, IO=I
IN, min
, TA=25°C)
O, max
Output Voltage All V
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All V
Selected by an external resistor
O, set
O, set
O
Output Regulation
Line (VIN=V
Load (IO=I
Temperature (T
IN, min
O, min
to V
) All
IN, max
to I
) All
O, max
to T
ref=TA, min
) All ⎯ 0.4
A, max
Output Ripple and Noise on nominal output
(VIN=V
IN, nom
and IO=I
O, min
to I
O, max
Cout = 1μF ceramic//10μFtantalum capacitors)
RMS (5Hz to 20MHz bandwidth) All
Peak-to-Peak (5Hz to 20MHz bandwidth) All
External Capacitance
ESR ≥ 1 mΩ All C
ESR ≥ 10 mΩ All C
Output Current All I
Output Current Limit Inception (Hiccup Mode ) All I
(VO= 90% of V
)
O, set
Output Short-Circuit Current All I
(VO≤250mV) ( Hiccup Mode )
Efficiency V
VIN= V
IO=I
, TA=25°C V
IN, nom
= V
O, max , VO
V
O,set
V
V
V
= 1.2Vdc η 81.5 %
O, set
= 1.5Vdc η 84.0 %
O,set
= 1.8Vdc η 85.0 %
O,set
= 2.5Vdc η 87.0 %
O,set
= 3.3Vdc η 89.0 %
O,set
= 5.0Vdc η 92.0 %
O,set
Switching Frequency All f
O, max
O, max
o
O, lim
O, s/c
sw
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = V
IN, nom
; TA=25°C)
Load Change from Io= 50% to 100% of Io,max;
1μF ceramic// 10 μF tantalum
All V
pk
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/μs; VIN = V
IN, nom
; TA=25°C)
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
All t
All V
s
pk
Peak Deviation
Settling Time (Vo<10% peak deviation)
All t
s
-2.0 V
-2.5%
+2.0 % V
O, set
⎯
+3.5% % V
0.7525 5.5 Vdc
⎯
⎯
0.3
0.4
⎯
⎯
⎯
⎯
⎯
15 30 mV
30 75 mV
⎯ ⎯
⎯ ⎯
1000 μF
3000 μF
0 5 Adc
⎯
⎯
200
2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
300
200
25
200
25
⎯
⎯
⎯ μs
⎯
⎯
% V
% V
% V
pk-pk
% I
Adc
kHz
mV
mV
μs
O, set
O, set
O, set
O, set
O, set
rms
o
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 3
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = V
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
(dIo/dt=2.5A/μs; VIN = V
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
IN, nom
IN, nom
; TA=25°C)
; TA=25°C)
All V
All t
All V
All t
pk
s
pk
s
⎯
⎯
⎯
⎯
General Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO=I
Weight
, TA=25°C) 5,677,000 Hours
O, max
⎯
2.8 (0.1)
50
50
50
50
⎯
⎯
⎯
⎯
⎯
g (oz.)
mV
μs
mV
μs
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 4
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
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=V
Compatible, Von/off signal referenced to GND
See feature description section)
Logic Low (On/Off Voltage pin open - Module ON)
Von/Off All VIL — — 0.4 V
Ion/Off All IIL — — 10 μA
Logic High (Von/Off > 2.5V – Module Off)
Von/Off All VIH — — V
Ion/off All IIH — — 1 mA
Turn-On Delay and Rise Times
(IO=I
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which V
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 V
Output voltage overshoot – Startup —
IO= I
Overtemperature Protection
(See Thermal Consideration section)
Input Undervoltage Lockout
to V
IN, min
O, max , VIN
o,set to 90% of Vo, set)
; VIN = 10 to 14Vdc, TA = 25 oC
O, max
Turn-on Threshold All
Turn-off Threshold All
; Open collector pnp or equivalent
IN, max
= V
= 25 oC, )
IN, nom, TA
=V
until Vo=10% of Vo,set)
IN
IN, min
All Tdelay — 3 — msec
All Tdelay — 3 — msec
All Trise
All T
ref
V
IN, max
— 4 6 msec
1
⎯
8.2 V
8.0 V
140
⎯
% V
°C
O, set
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 5
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Characteristic Curves
The following figures provide typical characteristics for the Austin MicroLynxTM 12V SMT modules at 25ºC.
86
84
82
80
78
76
74
EFFICIENCY, η (%)
72
70
012345
VIN = 10V
VIN = 12V
VIN= 14V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current (Vout =
1.2Vdc).
88
86
84
82
80
78
76
74
EFFICIENCY, η (%)
72
70
012345
VIN = 10V
VIN = 12V
VIN= 14V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current (Vout =
1.5Vdc).
88
86
84
82
80
78
76
74
EFFICIENCY, η (%)
72
70
0 12345
VIN = 10V
VIN = 12V
VIN= 14V
OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)
Figure 3. Converter Efficiency versus Output Current (Vout =
1.8Vdc).
91
88
85
82
79
76
EFFICIENCY, η (%)
73
70
0 12345
Figure 4. Converter Efficiency versus Output Current (Vout =
2.5Vdc).
91
88
85
82
79
76
EFFICIENCY, η (%)
73
70
012345
Figure 5. Converter Efficiency versus Output Current (Vout =
3.3Vdc).
96
93
90
87
84
81
78
EFFICIENCY, η (%)
75
0 12345
Figure 6. Converter Efficiency versus Output Current (Vout =
5.0Vdc).
VIN = 10V
VIN = 12V
VIN= 14V
VIN = 10V
VIN = 12V
VIN= 14V
VIN = 10V
VIN = 12V
VIN= 14V
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 6
,
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Characteristic Curves (continued)
The following figures provide typical characteristics for the MicroLynxTM 12V SMT modules at 25ºC.
4
3.5
3
(A)
IN
2.5
2
1. 5
1
0.5
INPUT CURRENT, I
0
6 8 10 12 14
INPUT VOLTAGE, VIN (V)
Figure 7. Input voltage vs. Input Current
(Vout = 5.0Vdc).
Io = 0A
Io = 2.5A
Io = 5A
(V) (100mV/div)
O
(A) (2A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAGE
I
TIME
t (5 μs/div)
Figure 10. Transient Response to Dynamic Load Change from
50% to 100% of full load (Vo = 3.3Vdc).
(V) (10mV/div)
O
V
OUTPUT VOLTAGE
TIME, t (2μs/div) TIME, t (5 μs/div)
Figure 8. Typical Output Ripple and Noise
(Vin = 12V dc, Vo = 0.75 Vdc, Io=5A).
(V) (10mV/div)
O
OUTPUT VOLTAGE
V
TIME, t (2μs/div) TIME, t (10μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 12.0V dc, Vo = 5.0 Vdc, Io=5A).
(V) (100mV/div)
O
(A) (2A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAGE
I
Figure 11. Transient Response to Dynamic Load Change from
100% to 50% of full load (Vo = 3.3 Vdc).
(V) (50mV/div)
O
(A) (2A/div) V
O
OUTPUT CURRENT, OUTPUT VOLTAGE
I
Figure 12. Transient Response to Dynamic Load Change from
50% to 100% of full load (Vo = 5.0 Vdc, Cext = 2x150 μF
Polymer Capacitors).
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 7
y
,
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin MicroLynxTM 12V SMT modules at 25ºC.
(V)
o
(V) (50mV/div)
O
(A) (2A/div) V
O
OUTPUT CURRENT OUTPUTVOLTAGE
I
TIME, t (10μs/div)
Figure 13. Transient Response to Dynamic Load Change
from 100% of 50% full load (Vo = 5.0 Vdc, Cext = 2x150 μF
mer Capacitors).
Pol
(V) (5V/div)
IN
(2V/div) V
OUTPUT VOLTAGE, INPUT VOLTAGE V
TIME, t (1 ms/div)
Figure 16. Typical Start-Up with application of Vin with (Vin
= 12Vdc, Vo = 3.3Vdc, Io = 5A).
(V) (5V/div)
On/off
V) (2V/div) V
O
V
OUTPUT VOLTAGE On/Off VOLTAGE
TIME, t (1 ms/div) TIME, t (1 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 12Vdc, Vo = 3.3Vdc, Io = 5.0A).
(V) (2V/div)
On/off
V) (1V/div) V
O
V
OUTPUT VOLTAGE On/Off VOLTAGE
igure 15. Typical Start-Up Using Remote On/Off with Low-
F
TIME, t (2 ms/div) TIME, t (20ms/div)
ESR external capacitors (7x150uF Polymer)
(Vin = 12Vdc
Vo = 3.3Vdc, Io = 5.0A, Co = 1050μF).
(V) (2V/div)
On/off
V) (1V/div) V
O
V
OUTPUT VOLTAGE On/Off VOLTAGE
Figure 17 Typical Start-Up using Remote On/off with
Prebias (Vin = 12Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0 Vdc).
(A) (5A/div)
O
OUTPUT CURRENT,
I
Figure 18. Output short circuit Current (Vin = 12Vdc, Vo =
0.75Vdc).
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 8
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin MicroLynxTM 12V SMT modules.
6
5
4
3
NC
2
0.5m/s (100 LFM)
1
OUTPUT CURRENT, Io (A)
0
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC
Figure 19. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12Vdc, Vo=0.75Vdc).
6
Figure 22. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12Vdc, Vo=5.0 Vdc).
6
5
NC
4
0.5m/s (100 LFM)
3
1.0m/s (200 LFM)
2
1.5m/s (300 LFM)
1
OUTPUT CURRENT, Io (A)
2.0m/s (400 LFM)
0
20 30 40 50 60 70 80 90
5
4
3
NC
2
0.5m/s (100 LFM)
1
OUTPUT CURRENT, Io (A)
1.0m/s (200 LFM)
0
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, TA OC
Figure 20. Derating Output Current versus Local Ambient
Temperature and Airflow (Vin = 12Vdc, Vo=1.8 Vdc).
6
5
4
3
NC
2
0.5m/s (100 LFM)
1
OUTPUT CURRENT, Io (A)
1.0m/s (200 LFM)
0
20 30 40 50 60 70 80 90
AMBIENT TEMPERATURE, TA OC
Figure 21. Derating Output Current versus Local Ambient
Temperature and Airflow
(Vin = 12Vdc, Vo=3.3 Vdc).
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 9
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Test Configurations
TO OSCILLOSCOPE
L
TEST
1μH
CS 1000μF
BATTERY
NOTE: Measure input reflected ri pple current with a sim ulated
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
source inductance (L
possible battery impedance. Measure current as shown
above.
) of 1μH. Capacit or CS offsets
TEST
Figure 23. Input Reflected Ripple Current Test Setup.
COPPER STRIP
V
(+)
O
1uF .
COM
NOTE: All voltage measurements to be take n 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
SCOPE
GROUND PLANE
Figure 24. Output Ripple and Noise Test Setup.
R
R
contact
distribution
VIN(+)
V
IN
2x100μF
Tantalum
V
O
CURRENT PROBE
CIN
RESISTIVE
LOAD
V
O
VIN(+)
COM
R
contac t Rdistribution
R
LOAD
Design Considerations
Input Filtering
The Austin MicroLynxTM 12V SMT module should be connected
to a low-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, 2x47 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 2x47 µF tantalum capacitors
and with 2x 22 µF ceramic capacitor (TDK part #:
C4532X5R1C226M) at full load.
350
300
250
200
15 0
10 0
50
0
Input Ripple Voltage (mVp-p)
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output with 2x47
µF tantalum capacitors and with 2x22 µF ceramic capacitors
at the input (80% of Io,max).
0123456
Tant alum
Ceramic
R
R
contact
distribution
NOTE: All vol tage measurem ents to b e taken at th e module
terminal s, as show n above . If sock ets are us ed then
Kelvin conn ections a re requir ed at the modu le termin als
to avoid meas uremen t errors due to socket c ontact
resistance.
COM
COM
R
contac t Rdistribution
Figure 25. Output Voltage and Efficiency Test Setup.
. I
V
O
Efficiency
=
η
VIN. I
O
IN
x 100 %
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 10
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Design Considerations (continued)
Output Filtering
The Austin MicroLynxTM 12V module is designed for low output
ripple voltage and will meet the maximum output ripple
specification with 1 µF ceramic and 10 µF polymer 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 6A in the positive input lead
.
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 11
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Feature Description
Remote On/Off
The Austin MicroLynxTM SMT 12V power modules feature an
On/Off pin for remote On/Off operation of the module. 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 module on and off using remote On/Off, connect an
open collector pnp transistor between the On/Off pin and the
pin (See Figure 27).
V
IN
When the transistor Q1 is in the OFF state, the power module is
ON (Logic Low on the On/Off pin of the module) and the
maximum Von/off of the module is 0.4 V. The maximum
allowable leakage current of the transistor when Von/off = 0.4V
= V
and V
IN
transistor is in the active state, the power module is OFF.
During this state VOn/Off =10 - 14V and the maximum IOn/Off =
1mA.
Figure 27. Remote On/Off Implementation
Remote On/Off can also be implemented using open-collector
logic devices with an external pull-up resistor. Figure 28a
shows the circuit configuration using this approach. Pull-up
resistor, R
proper operation of the module over the entire temperature
range.
VIN+
ON/OFF
GND
Figure 27a. Remote On/Off Implementation using logic-level
devices and an external pull-up resistor
is 10μA. During a logic-high when the
IN,max
VIN(+)
Lynx-series Module
I
On/Off
On/Off
Pin
GND
20k
20k
Enable
Css
pull-up, for the configuration should be 68k (+/-5%) for
R
pull-up
I
ON/OFF
V
ON/OFF
Q1
+
_
MODULE
PWM Enable
R1
Q2 CSS
R2
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 2A.
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 T
(see Figure 31) exceeds 140
shutdown is not intended as a guarantee that the unit will
survive temperatures beyond its rating. The module will
automatically restarts after it cools down.
o
C (typical), but the thermal
ref2
,
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 12
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Feature Descriptions (continued)
Output Voltage Programming
The output voltage of the Austin MicroLynx
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:
10500
= 1000
Rtrim
Rtrim is the external resistor in Ω
Vo is the desired output voltage
For example, to program the output voltage of the Austin
MicroLynx
TM
12V module to 1.8V, Rtrim is calculated as follows:
V
(+)
IN
ON/OFF
GND
−
7525.0
Vo
10500
= 1000
Rtrim
−
7525.08.1
V
(+)
O
TRIM
TM
−
−
Ω= kRtrim 024.9
R
trim
12V can be
Ω
LOAD
Figure 28. Circuit configuration to program output voltage
using an external resistor
Austin MicroLynx
a voltage between TRIM and GND pins (Figure 29). The following
equation can be used to determine the value of Vtrim needed to
obtain a desired output voltage Vo:
For example, to program the output voltage of a MicroLynx
module to 3.3 Vdc, Vtrim is calculated as follows:
TM
12Vdc can also be programmed by applying
{}()
7525.00667.07.0 −×−= VoVtrim
{}
)7525.03.30667.07.0( −×−=Vtrim
TM
VVtrim 530.0=
VIN(+)
ON/OFF
Figure 29. Circuit Configuration for programming Output
voltage using external voltage source
Table 1 provides Rtrim values for most common output
voltages. Table 2 provides values of external voltage
source, Vtrim for various output voltage.
Table 1
Table 2
Using 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.
VO(+)
TRIM
+
rim
t
V
GND
V
(V) Rtrim (KΩ)
O, set
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
V
(V) Vtrim (V)
O, set
0.7525 Open
1.2 0.670
1.5 0.650
1.8 0.630
2.5 0.583
3.3 0.530
5.0 0.4166
-
LOAD
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 13
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Feature Descriptions (continued)
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 (P
Voltage Margining
Output voltage margining can be implemented in the Austin
MicroLynx
from Trim pin to ground pin for margining-up the output
voltage and by connecting a resistor, R
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 R
for a specific output voltage and % margin. Please consult
your local GE technical representative for additional details
Figure 30. Circuit Configuration for margining Output
voltage.
= V
x I
Vo
GND
o,max
).
margin-down
margin-up
Rmargin-down
Q2
Rmargin-up
Rtrim
Q1
max
o,set
TM
modules by connecting a resistor, R
Austin Lynx or
Lynx II Series
Trim
margin-up
, from Trim
and R
margin-down
,
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 14
A
W
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Thermal Considerations
Power modules operate in a variety of thermal environments;
however, sufficient cooling should 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 long axis of the module as shown in
figure 31. The derating data applies to airflow in either
direction of the module’s long axis.
Air Flow
T
(inductor winding)
ref1
ind Tunnel
PWBs
x
7.24_
(0.285)
ir
flow
25.4_
(1.0)
76.2_
(3.0)
Power Module
Probe Location
for measuring
airflow and
ambient
temperature
Top View
Bottom View
Figure 31. T
The thermal reference points, T
specifications of thermal derating curves are shown in Figure
31. For reliable operation these temperatures should not
exceed 125
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.
Temperature measurement location.
ref
and T
ref 1
o
C.
T
ref2
used in the
ref2
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 by various
module versus local ambient temperature (T
convection and up to 1m/s (200 ft./min) are shown in the
Characteristics Curves section.
) for natural
A
Layout Considerations
Copper paths must not be routed beneath the power module.
For additional layout guide-lines, refer to FLTR100V10
application note.
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 15
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
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.)
Co-planarity (max): 0.102 [0.004]
PIN FUNCTION
1 On/Off
2 VIN
3 GND
4 Trim
5 VOUT
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 16
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
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.)
PIN FUNCTION
1 On/Off
2 VIN
3 GND
4 Trim
5 VOUT
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 17
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Packaging Details
The Austin MicroLynxTM 12V SMT versions are supplied in tape & reel as standard. Modules are shipped in quantities of 400
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”)
Width 44.0 mm (1.73”)
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 18
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Surface Mount Information
Pick and Place
The Austin MicroLynxTM 12V 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
placing. The label meets all the requirements for surface
mount processing, as well as safety standards and is able to
withstand maximum reflow temperature. The label also
carries product information such as product code, serial
number and 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 pick & placement speed should be considered
to optimize this process. The minimum recommended
nozzle diameter for reliable operation is 3mm. The maximum
nozzle outer diameter, which will safely fit within the
allowable component spacing, is 8 mm max.
Tin Lead Soldering
The Austin MicroLynxTM 12V 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
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
o
C. Typically,
combination of convection/IR. For reliable soldering the
solder reflow profile should be established by accurately
measuring the modules CP connector temperatures.
300
250
200
15 0
10 0
REFLOW TEMP (°C)
50
0
Peak Temp 235oC
Heat zone
oCs-1
max 4
So ak zone
30-240s
Preheat zo ne
oCs-1
max 4
REFLOW TIME (S)
T
above
lim
205
Figure 34. Reflow Profile for Tin/Lead (Sn/Pb) process.
240
235
230
225
220
215
210
MAX TEMP SOLDER (°C)
205
200
0 10 203040 5060
Figure 35. Time Limit Curve Above 205oC for Tin/Lead
(Sn/Pb) process.
o
C
Cooling
zo ne
oCs-1
1- 4
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 19
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Surface Mount Information (continued)
Lead Free Soldering
The –Z version Austin MicroLynx 12V SMT modules are leadfree (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 Austin MicroLynx 12V 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).
300
Per J-STD-020 Rev. C
250
200
150
Heat ing Zone
1°C/Second
100
Reflow Temp (°C)
50
0
Figure 36. Recommended linear reflow profile using
Sn/Ag/Cu solder.
Peak Temp 260°C
* Min. Time Above 235°C
15 Seconds
*Time Above 217°C
60 Seconds
Reflow Time (Seconds)
Cooling
Zone
May 6, 2013 ©2013 General Electric Company. All rights reserved. Page 20
GE
Data Sheet
12V Austin MicroLynxTM 5A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 5A Output Current
Ordering Information
Please contact your GE representative for pricing, availability and optional features.
Table 3. Device Codes
Input
Device Code
AXA005A0X-SR 10 – 14Vdc 0.75 – 5.5Vdc 5 A
AXA005A0X-SRZ 10 – 14Vdc 0.75 – 5.5Vdc 5 A
-Z refers to RoHS compliant versions
Voltage
Range
Output
Voltage
Output
Current
Efficiency
3.3V@ 6A
89.0%
89.0%
On/Off
Logic
Negative SMT 108981622
Negative SMT 108995172
Connector
Type
Comcodes
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
May 6, 2013 ©2013 General Electric Company. All rights reserved. Version 1.53
www.ge.com/powerelectronics
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