V7809-500 查看數據表（PDF） - CUI INC

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V7809-500

DC switching regulator, non-isolated

CUI INC 

PART NUMBER: V78XX-500 series

TYPICAL APPLICATION CIRCUIT

rev.

page 3 of 6

date 06/2008

DESCRIPTION: DC switching regulator, non-isolated

Vin

1

3

Vout

V78XX-500

GND

2

C1

10μF/50V

C2

1 0 0μ F / 2 5 V

INPUT CAPACITOR (C1):

A low ESR capacitor is recommended to keep the noise at the converter to a minimum.

Ceramic capacitors are preferred but tantalum or low ESR electrolytic capacitors may

also suffice. Place C1 as close as possible to pins 1 & 2.

OUTPUT CAPACITOR (C2):

A 100μF/25V electrolytic capacitor is recommended.

TEST CIRCUIT

FOR EFFICIENCY & RIPPLE GRAPHS (PAGE4)

+

DC Power

Source

-

Current

Meter

Voltage

Meter

+Vin

+Vout

Cin

DC/DC

Converter

GND

0V

1. Cin = 10μF / 50V for 500mA and 22μF / 50V for 1A, Cout = 100μF / 16V.

2. C01 = 10μF / 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.

Current

Meter

30cm, 18AWG A

Cout

B

Twisted

Voltage

Meter

A

+A

A

C01 + C02

B

B

B

-

Electronic

Load

20MHz

Oscilloscope

20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382

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