Preliminary Data Sheet
9-36V ProLynx
TM
5A: Non-isolated DC-DC Power Modules
October 28, 2010
9 – 36Vdc input; 3Vdc to 18Vdc output; 5A to 2.5A output current
Test Configurations
TO OSCILLOSCOPE
L
TEST
1μH
V
IN
(+)
CURRENT PROBE
Design Considerations
Input Filtering
The 9-36V ProLynx 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.
To minimize input voltage ripple, ceramic capacitors
are recommended at the input of the module. Figure
28 shows the input ripple voltage for various output
voltages at maximum load current with 2x10 µF or
3x10 µF ceramic capacitors and an input of 12V,
while Fig. 29 shows the input ripple for an input
voltage of 28V.
TM
BATTERY
C
S
1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
C
IN
2x100μF
Tantalum
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (L
TEST
) of 1μH. Capacitor C
S
offsets
possible battery impedance. Measure current as shown
above.
Input Ripple Voltage (mVp-p)
Figure 25. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
RESISTIVE
LOAD
0.1uF
COM
SCOPE USING
BNC SOCKET
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.
10uF
250
225
200
175
150
125
100
3
4
5
6
7
8
2x10uF
3x10uF
Vo+
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various output
voltages with 2x10 µF or 3x10 µF ceramic
capacitors at the input (maximum load). Input
voltage is 12V.
Figure 26. Output Ripple and Noise Test Setup.
R
distribution
R
contact
V
IN
(+)
V
O
R
contact
R
distribution
V
IN
V
O
R
LOAD
Input Ripple Voltage (mVp-p)
275
250
225
200
175
150
125
100
3
5
7
9
2x10uF
3x10uF
R
distribution
R
contact
COM
COM
R
contact
R
distribution
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 27. Output Voltage and Efficiency Test Setup.
V
O
. I
O
Efficiency
η
=
V
IN
. I
IN
x
100 %
11
13
15
17
Output Voltage (Vdc)
Figure 29. Input ripple voltage for various output
voltages with 2x10 µF or 3x10 µF ceramic
capacitors at the input (maximum load). Input
voltage is 28V.
LINEAGE
POWER
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
