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CUI Inc

│ SERIES: PUZ3-D │ DESCRIPTION: DC-DC CONVERTER

date 08/12/2015

│ 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 & Table 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 capacitance must be less than the maximum capacitive load (see Table 3).

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

standard. Refer to Figure 3 and Table 4 for the startup current of this dc-dc module.

Figure 2

Figure 3

Table 4

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

310

48

150

DC

DC

Vin

GND

+Vo

0V

Cin

Cout

Vin

GND

+Vo

0V

Cin

Cout

DC

DC

-Vo

Cout

Dual Output

Single Output

Single

Vout

(Vdc)

Max. Capacitive

Load

(μF)

Dual

Vout

(Vdc)

Max. Capacitive

(μF)

3.3

4700

--

--

5

4700

5

2200

12

2700

9

2000

15

2200

12

1800

24

1800

15

1000

Table 3

APPLICATION NOTES

Table 2

Vin

(Vdc)

Cin

(µF)

Cout

(µF)

5

100

10

12

100

10

24

10~47

10

48

10~47

10

Note:

1. For each output.

For more information, please visit the product page.