GE Industrial Solutions 9-36V ProLynx 3A - Manual (Page 11)

GE Data Sheet
9-36V ProLynx TM 3A: Non-Isolated DC-DC Power Modules
9Vdc –36Vdc input; 3Vdc to 18Vdc output; 3A to 1.5A Scaled output current
9Vdc –24Vdc input; -3.3Vdc to -12Vdc output; 3A to 0.7A Scaled output current
July 23, 2013 ©2013 General Electric Company. All rights reserved. Page 11
Output Filtering
The 9-36V ProLynx TM modules are designed for low output
ripple voltage and will meet the maximum output ripple
specification with 0.1 µF ceramic and 10 µF ceramic 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. Figures 6 and 7 provides output ripple information for
different external capacitance values at various Vo and for full
load currents. For stable operation of the module, limit the
capacitance to less than the maximum output capacitance as
specified in the electrical specification table. Optimal
performance of the module can be achieved by using the
Tunable Loop
TM feature described later in this data sheet.
Figure 30 Output ripple voltage for various output voltages
with external 1x10 µF, 2x10 µF or 4x10 µF ceramic capacitors
at the output (max load). Input voltage is 12V
Figure 31 Output ripple voltage for various output voltages
with external 1x10 µF, 2x10 µF or 4x10 µF ceramic capacitors
at the output (max load). Input voltage is 28V
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 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006
+ A11 (VDE0805 Teil 1 + A11):2009-11; EN 60950-1:2006 +
A11:2009-03.
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 8A in the positive input lead
. 10
20
30
40
50
3 4 5 6 7 8
Ri
p
p
le
(m
V
p
-p
)
Output Voltage(Volts)
1x10uF
2x10uF
4x10uF
10
30
50
70
90
110
130
150
170
2 4 6 8 10 12 14 16 18
R
ippl
e(
m
V
p-
p)
Output Voltage(Volts)
1x10uF
2x10uF
4x10uF