Data Sheet
12V Austin LynxTM SIP Non-isolated Power Modules, Programmable:
10Vdc – 14Vdc input; 0.75Vdc to 5.5Vdc Output;10A Output Current
March 30, 2008
Test Configurations
Design Considerations
Input Filtering
CURRENT PROBE
TO OSCILLOSCOPE
The 12V Austin Lynx Programmable SIP module should
be connected to a low ac-impedance source. A highly
LTEST
VIN(+)
1μH
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.
CIN
CS 1000μF
Electrolytic
2x100μF
Tantalum
E.S.R.<0.1Ω
@ 20°C 100kHz
In a typical application, 4x47 µF low-ESR tantalum
COM
capacitors (AVX part #: TPSE476M025R0100, 47µF
25V 100 mΩ ESR tantalum capacitor) will be sufficient
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.
to provide adequate ripple voltage at the input of the
module. To minimize the ripple voltage at the input,
very 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 4x 22 µF ceramic
Figure 23. Input Reflected Ripple Current Test
Setup.
capacitor (TDK part #: C4532X5R1C226M) at full load.
COPPER STRIP
VO(+)
COM
RESISTIVE
LOAD
300
250
200
150
1uF
.
10uF
SCOPE
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
10 0
Tantalum
50
0
Figure 24. Output Ripple and Noise Test Setup.
Ceramic
0
1
2
3
4
5
6
Rdistribution Rcontact
Rcontact Rdistribution
VIN(+)
VO
Output Voltage (Vdc)
RLOAD
Figure 26. Input ripple voltage for various output
with 4x47 µF polymer and 4x22 µF ceramic
capacitors at the input (full load).
VO
VIN
Rdistribution Rcontact
Rcontact Rdistribution
COM
COM
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.
VO. IO
Efficiency
=
x
100 %
η
VIN. IIN
LINEAGE POWER
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
