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CUI Inc

│ SERIES: PVB3-D │ DESCRIPTION: DC-DC CONVERTER

date 03/19/2013

│ page 5 of 6

1. Output load requirement

To ensure this module can operate efficiently and reliably, the minimum output load may not be less than 5% of the full load during

operation. If the actual output power is low, connect a resistor at the output end in parallel to increase the load.

2. 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 2). If you want to further decrease the input/output ripple, you can increase the capacitance accordingly

or choose capacitors with low ESR. 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 capaci-

tance must be less than the maximum capacitive load (see Table 1).

3. Input Current

When it is used in an unregulated condition, make sure that the input fluctuations and ripple voltage do not exceed the module stan-

dard. Refer to Figure 3 for the startup current of this dc-dc module.

APPLICATION NOTES

Figure 2

Figure 3

Table 1

Vin

(Vdc)

Cin

(µF)

Cout

(µF/mA)

5

100

10/100

12

100

10/100

24

10~47

10/100

48

10~47

10/100

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.

Range

InputVoltage

InputVoltage (V)

Ip

Vin

(Vdc)

Ip

(mA)

5

1400

12

620

24

300

48

150

DC

DC

Vin

GND

+Vo

0V

Cin

Cout

Vin

GND

+Vo

0V

Cin

Cout

DC

DC

-Vo

Cout

Dual Output

Single Output