PQD6-D Datasheet, PDF (5/6 Pages) CUI INC – DC-DC CONVERTER

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CUI Inc │ SERIES: PQD6-D │ DESCRIPTION: DC-DC CONVERTER
date 10/29/2013 │ page 5 of 6
APPLICATION NOTES
1. Recommended circuit
This series has been tested according to the following recommended testing circuit before leaving the factory. This series should be
tested under load (see Figure 3). If you want to further decrease the input/output ripple, you can increase the capacitance accord-
ingly or choose capacitors with low ESR (see Table 3). However, the capacitance of the output filter capacitor must be appropriate. If
the capacitance is too high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the
maximum capacitance must be less than the maximum capacitive load (see Table 4).
Figure 3
Single Output
Vin
Cin
GND
DC DC
Dual Output
+Vo
Vin
+Vo
Cin
DC DC
0V
0V ^GND
-Vo
Vin
(Vdc)
24
48
Table 3
Cin
(μF)
100
10~47
Cout
(μF)
10
10
Table 4
Single Vout Max. Capacitive Load Dual Vout
(Vdc)
(μF)
(Vdc)
3.3
1800
--
5
1000
±5
12
100
±12
15
100
±15
24
47
--
Note:
1. For each output.
Max. Capacitive Load¹
(μF)
--
470
100
100
--
Note:
1. Minimum load shouldn't be less than 5%, otherwise ripple may increase dramatically. Operation under minimum load will not damage the converter, however, they may
not meet all specifications listed.
2. Maximum capacitive load is tested at input voltage range and full load.
3. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
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