cui.com

CUI Inc

│ SERIES: PEM2-D │ DESCRIPTION: DC-DC CONVERTER

date 01/29/2015

│ 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 10% 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. Overload Protection

Under normal operating conditions, the output circuit of this product has no protection against overload. The simplest method to add

this is to add a circuit breaker to the circuit.

3. Recommended circuit

If you want to further decrease the input/output ripple, you can increase the capacitance accordingly or choose capacitors with low

ESR(see Figure 2 & Table 2). 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).

APPLICATION NOTES

Vin

(Vdc)

Cin

(µF)

Single Vo

(Vdc)

Cout

(µF)

Dual Vo

(Vdc)

Cout

(µF)

5

4.7

5

10

±5

4.7

12

2.2

9

4.7

±12

1

15

2.2

12

2.2

±15

0.47

24

1

15

1

--

--

Notes:

1. Operation under minimum load will not damage the converter; however, they may not meet all specifications listed.

2. Max. capacitive load tested at input voltage range and full load.

3. It is recommended to use either ceramic capacitors or electrolytic capacitors on the input and the output. Using tantalum capacitors may increase the risk of failure.

4. All specifications measured at: Ta=25°C, humidity<75%, nominal input voltage and rated output load, unless otherwise specified.

Single Vout

(Vdc)

Max. Capacitive Load

(μF)

Dual Vout

(Vdc)

(μF)

5

220

5

100

9

220

--

--

12

220

12

100

15

220

15

100

Figure 2

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

Cout

Vo

Dual Output

Single Output

Vin

GND

+Vo

0V

DC

Cin

DC

Cout

Table 2

Note:

It’s not recommended to connect any external capacitors in

applications with less than 0.5 watt output.

Table 3

Note:

1. For each output.

For more information, please visit the product page.