GE Industrial Solutions 2A DLynx - Manual (Page 13)

GE Energy
Datasheet
2A DLynx TM : Non-Isolated DC-DC Power Modules
3Vdc –14Vdc input; 0.6Vdc to 5.5Vdc output; 2A Output Current
June 24, 2013 ©2012 General Electric Company. All rights reserved. Page 13
Output Filtering
The 12V DLynx TM 2A modules are designed for low output ripple
voltage and will meet the maximum output ripple specification
with 0.1 µF ceramic and 22µF 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. A minimum 22uF External Cap must be used. Figure
42 provides output ripple information for different external
capacitance values at various Vo and for a load current of 2A.
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.
0
2
4
6
8
10
12
14
0.5 1.5 2.5 3.5 4.5
Output Voltage(Volts)
Ri
p
p
le
(m
V
p
-p
)
1x22uF External Cap
1x47uF External Cap
2x47uF External cap
Figure 42. Output ripple voltage for various output voltages
with external 1x22 µF, 1x47 µF or 2x47 µF ceramic capacitors
at the output (2A load). Input voltage is 12V.
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 slow-
blow fuse with a maximum rating of 4A in the positive
input lead
.