Data Sheet
September 30, 2009
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2Vdc to 5.5Vdc Output; 10A Output Current
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS03-079 ver. 1.23
PDF name: austin lynx smt 12v.pdf
Applications
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
Servers and storage applications
Networking equipment
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
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
Description
Austin LynxTM 12V 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 ranging from 1.2Vdc 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.
RoHS Compliant
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 = 5.0Vdc 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.
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 -10 10 % 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 = 1.2Vdc η 87.5 %
VIN= VIN, nom, TA=25°C VO,set = 1.5Vdc η 89.0 %
IO=IO, max , VO= VO,set 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
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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.)
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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 ― ― 14 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 = 3.0 to 5.5Vdc, 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
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 6
Characteristic Curves
The following figures provide typical characteristics for the Austin LynxTM 12 V SMT modules at 25ºC.
70
72
74
76
78
80
82
84
86
88
90
02 46 810
Vin=14V
Vin=10V
Vin=12V
74
76
78
80
82
84
86
88
90
92
94
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout =1.2Vdc).
Figure 4. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
74
76
78
80
82
84
86
88
90
92
02 46 810
Vin=14V
Vin=10V
Vin=12V
77
79
81
83
85
87
89
91
93
95
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
Figure 5. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
76
78
80
82
84
86
88
90
92
0246810
Vin=14V
Vin=10V
Vin=12V
78
80
82
84
86
88
90
92
94
96
0246810
Vin=14V
Vin=10V
Vin=12V
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
OUTPUT CURRENT, IO (A)
Figure3. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
Figure 6. Converter Efficiency versus Output Current
(Vout = 5.0Vdc).
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 7
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM 12 V SMT modules at 25ºC.
0
1
2
3
4
5
6
7 8 91011121314
Io = 10 A
Io =5A
Io=0A
INPUT CURRENT, IIN (A)
INPUT VOLTAGE, VIN
(
V
)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/div)
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)
TIME, t (2μs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (2A/div) VO (V) (200mV/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)
TIME, t (2μs/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
IO (A) (5A/div) VO (V) (200mV/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).
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM 12 V SMT modules at 25ºC.
OUTPUT CURRENT, OUTPUTVOLTAGE
IO (A) (5A/div) VO (V) (200mV/div)
TIME, t (10μs/div)
OUTPUT VOLTAGE INPUT VOLTAGE
Vo (V) (1V/div) VIN (V) (5V/div)
TIME, t (2 ms/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 3.3 Vdc, Cext
= 2x150
μ
F 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
)
.
On/Off VOLTAGE OUTPUT VOLTAGE
VOn/off (V) (5V/div) VOV) (1V/div)
TIME, t (1 ms/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VOV) (1V/div) VOn/off (V) (2V/div)
TIME, t (2 ms/div)
Figure 14. Typical Start-Up Using Remote On/Off (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).
On/Off VOLTAGE OUTPUT VOLTAGE
VOn/off (V) (5V/div) VO (1V/div)
TIME, t (1 ms/div)
OUTPUT CURRENT,
IO (A) (10A/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).
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 9
Characteristic Curves (continued)
The following figures provide thermal derating curves for the Austin LynxTM 12 V SMT modules.
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
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)
AMBIENT TEMPERATURE, TA OC
OUTPUT CURRENT, Io (A)
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).
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)
AMBIENT TEMPERATURE, TA OC
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0Vdc,
Vo=1.8 Vdc).
0
1
2
3
4
5
6
7
8
9
10
11
20 30 40 50 60 70 80 90
10 0 L FM
200 LFM
NC
300 LFM
400 LFM
OUTPUT CURRENT, Io (A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 12.0Vdc,
Vo=3.3 Vdc).
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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
Rcontac t Rdistribution
Rcontac t 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
Austin LynxTM 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, 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
0 12 3456
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).
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 11
Design Considerations (continued)
Output Filtering
The Austin LynxTM 12 V 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 20A in the positive
input lead.
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 12
Feature Description
Remote On/Off
The Austin LynxTM 12V 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 adjustment feature allows the output
voltage set point to be increased or decreased by
connecting an external resistor between the TRIM pin
and Vo pin (decrease output voltage) or GND pin
(increase output voltage).
To trim up output voltage set point using an external
resistor, connect Rtrim-up between the TRIM and GND
pins (Figure 28). The value of Rtrim-up resistor is defined
as:
Ω
⎥
⎦
⎤
⎢
⎣
⎡−
−
=− 1000
,
10500
setVoVo
upRtrim
Rtrim-up is the external resistor in Ω
Vo,set is the nominal output voltage
Vo is the desired trim-up voltage
For example, to trim up the output voltage of the 1.5V
module (AXA010A0M93-SR) by 8% to 1.62V, Rtrim-up is
calculated as follows:
Vo,set = 1.5V
Vo = 1.62V:
⎥
⎦
⎤
⎢
⎣
⎡−
−
=− 1000
5.162.1
10500
upRtrim
Ω=− kupRtrim 5.86
VO(+)
TRIM
GND
R
trim
LOAD
VIN(+)
ON/OFF
Vout
Figure 28. Circuit configuration for programming
output voltage using an external resistor.
To trim down output voltage set point using an external
resistor, connect Rtrim-down between TRIM and Vo pins
(Figure 29). The value of Rtrim-down resistor is defined
as:
Ω
⎥
⎦
⎤
⎢
⎣
⎡−
−
−
=− 1000
,
15000)7.0(
VosetVo
Vo
downRtrim
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 13
Feature Descriptions (continued)
V
O
(+)
TRIM
GND
LOAD
V
IN
(+)
ON/OFF
Rtrim-down
Figure 29. Circuit configuration to trim-down output
voltage using an external resistor
Rtrim-down is the external resistor in Ω
Vo,set is the nominal output voltage
Vo, is the desired trim-down voltage
For example, to trim down the output voltage of the 2.5V
module (AXA010A0G93-SR) by 8% to 2.3V, Rtrim-down
is calculated as follows:
Vo,set = 2.5V
Vo = 2.3V
Ω
⎥
⎦
⎤
⎢
⎣
⎡−
−
−
=− 1000
3.25.2
15000)7.03.2(
downRtrim
Ω=− kdownRtrim 119
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 Austin LynxTM 12V 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 30). 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 30. Remote sense circuit configuration
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 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.
Layout Considerations
Copper paths must not be routed beneath the power
module. For additional layout guide-lines, refer to the
FLTR100V10 application note.
A
i
r
flow
x
Po w e r M o d u le
W
ind Tunnel
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)
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 15
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)
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 16
Recommended Pad Layout
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)
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 17
Packaging Details
The Austin LynxTM 12 V 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”)
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14Vdc input; 1.2
V
dc to 5.5Vdc Output; 10A output current
LINEAGE POWER 18
Surface Mount Information
Pick and Place
The Austin LynxTM 12 V 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 zo ne
max 4
o
Cs
-1
Soak zo ne
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
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.
Data Sheet
March 14, 2006
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 19
Surface Mount Information (continued)
Lead Free Soldering
The –Z version Austin Lynx 12V 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 Austin Lynx 12V SMT modules have a MSL
rating of 2.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling,
Packing, Shipping and Use of Moisture/Reflow
Sensitive Surface Mount Devices). Moisture barrier
bags (MBB) with desiccant are required for MSL
ratings of 2 or greater. These sealed packages
should not be broken until time of use. Once the
original package is broken, the floor life of the product
at conditions of ≤ 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/Second
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.
Data Sheet
November 28, 2005
Austin LynxTM 12 V SMT Non-isolated Power Modules:
10 – 14 Vdc input; 1.2Vdc to 5.5Vdc Output; 10A output current
LINEAGE POWER 20
Document No: DS03-079 ver. 1.23
PDF name: austin lynx smt 12v.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 3. Device Codes
Device Code Input
Voltage
R
Output
Voltage
Output
Current Efficiency Connector
Type Packaging Comcodes
AXA010A0P93-SR 10 – 14Vdc 1.2 V 10 A 87.5% SMT Tape & Reel 108970112
AXA010A0M93-SR 10 – 14Vdc 1.5 V 10 A 89.0% SMT Tape & Reel 108970096
AXA010A0Y93-SR 10 – 14Vdc 1.8 V 10 A 90.0% SMT Tape & Reel 108969726
AXA010A0G93-SR 10 – 14Vdc 2.5 V 10 A 92.0% SMT Tape & Reel 108970070
AXA010A0F93-SR 10– 14Vdc 3.3 V 10 A 93.0% SMT Tape & Reel 108970054
AXA010A0A93-SR 10 – 14Vdc 5.0 V 10 A 95.0% SMT Tape & Reel 108970013
AXA010A0P93-SRZ 10 – 14Vdc 1.2 V 10 A 87.5% SMT Tape & Reel CC109102885
AXA010A0M93-SRZ 10 – 14Vdc 1.5 V 10 A 89.0% SMT Tape & Reel CC109102877
AXA010A0Y93-SRZ 10 – 14Vdc 1.8 V 10 A 90.0% SMT Tape & Reel CC109102902
AXA010A0G93-SRZ 10 – 14Vdc 2.5 V 10 A 92.0% SMT Tape & Reel CC109102860
AXA010A0F93-SRZ 10– 14Vdc 3.3 V 10 A 93.0% SMT Tape & Reel CC109102852
AXA010A0A93-SRZ 10 – 14Vdc 5.0 V 10 A 95.0% SMT Tape & Reel CC109106787
-Z refers to RoHS-compliant codes
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-244-9428)
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
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Tel: +65 6593 7211
Europe, Middle-East and Africa Headquarters
Tel: +49 898 780 672 80
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Tel: +91 80 28411633
Lineage Powe r reserves the right to make changes to the product(s) or informat ion contained herein without not ice. No liability is assumed as a result of their use or
a
pplication. No rights under any pate nt accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Informa tion on these patents is available at www.lineagepower.com/paten ts.
©
2009 Linea
g
e Power Cor
p
oration
,
(
Plano
,
Texas
)
All Inte rnational Ri
g
hts Reserved.