Data Sheet
Austin SuperLynxTM II 12V SMT Non-isolated Power Modules:
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output;16A output current
November 19, 2008
Test Configurations
Design Considerations
Input Filtering
CURRENT PROBE
TO OSCILLOSCOPE
Austin SuperLynxTM II 12V SMT module should be
connected to a low-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
CIN
CS 1000μF
Electrolytic
minimize input ripple voltage and ensure module
stability.
2x100μF
Tantalum
E.S.R.<0.1Ω
@ 20°C 100kHz
COM
In a typical application, 6x47 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 further minimize ripple
voltage at the input, very low ESR ceramic
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.
Figure 23. Input Reflected Ripple Current Test Setup.
capacitors are recommended at the input of the
module. Figure 26 shows input ripple voltage (mVp-
p) for various outputs with 6x47 µF tantalum
capacitors and with 6x22 µF ceramic capacitor (TDK
part #: C4532X5R1C226M) at full load.
COPPER STRIP
VO(+)
COM
RESISTIVE
LOAD
1uF
.
10uF
SCOPE
350
300
250
200
150
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.
Figure 24. Output Ripple and Noise Test Setup.
10 0
Tantalum
50
Rdistribution Rcontact
Rcontact Rdistribution
Ceramic
VIN(+)
VO
0
0
1
2
3
4
5
6
RLOAD
VO
VIN
Output Voltage (Vdc)
Figure 26. Input ripple voltage for various output
with 6x47 µF tantalum capacitors and with 6x22 µF
ceramic capacitors at the input (full load).
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 ]
