cui.com

CUI Inc

│ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR

date

11/08/2012 │ page 4 of 6

TYPICAL APPLICATION CIRCUIT

TEST CIRCUIT

+

+Vin

GND

+Vout

0V

DC Power

Source

-

Current

Meter

Voltage

Meter

Cin

DC/DC

Converter

Cout

Twisted

B

C01

C02

AA

A

BB

B

+

-

+

Current

Meter

Voltage

Meter

Electronic

Load

20MHz

Oscilloscope

1. Cin = 10

μF / 50V for 500mA and 22μF / 50V for 1A, Cout = 100μF / 16V.

2. C01 = 10

μF / 50V Electrolytic, C02 = 0.1μF / 50V Ceramic.

3. All points labeled A refer to one junction.

4. All points labeled B refer to one junction.

5. Use a short ground loop for probing. Do not use a wired ground clip.

1. C1 and C2 are required and should be fitted close to the converter pins

2. For the capatance of C1 and C2, see the external capacitor table. Low ESR types should be chosen

3. C3: a low ESR capacitor is required to keep the noise at the converter to a minimum. Ceramic capacitors are preffered, but tantalum of

low ESR electrolytic capacitors may also suffice; General use 10μF/50V ceramic capacitor. C4 Optional, General use 100μF/25V

electrolytic capacitor.

4. No parallel connection or plug and play

For more information, please visit the product page.