PYB10 Datasheet, PDF (5/6 Pages) CUI INC – DC-DC CONVERTER

CUI Inc │ SERIES: PYB10 │ DESCRIPTION: DC-DC CONVERTER
date 08/15/2013 │ 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).
Single Output
Vin
Cin
GND
DC DC
C out
Figure 3
Dual O utput
+Vo
Vin
Cin
0V
GND
DC DC
+Vo
C out
0V
Cout
-Vo
Table 3
Vin
(Vdc)
24
48
Cin
(μF)
10~47
10~47
Cout
(μF)
10
10
Table 4
Single
Vout
(Vdc)
3.3
5
12
15
24
Max.
Capacitive
Load
(μF)
2200
2200
470¹
330²
100
Dual
Vout
(Vdc)
--
5
12
15
--
Notes:
1. 330 μF for 48Vin.
2. 220 μF for 48Vin.
3. 150 μF for 48Vin.
4. For each output.
Max.
Capacitive
Load⁴
(μF)
--
680
220³
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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