Supertex inc.

Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

CL220

Features

Applications

General Description

The Supertex CL220 is a high voltage, temperature-

compensated, 20mA constant current regulator. The device

operates at up to 220V, and is accurate to ±10% over a 5.0

- 160V range. The device can be used as a two terminal

constant current source or constant current sink.

A typical application for the CL220 is to drive LEDs with

a constant current of 20mA. Multiple CL220s can also be

used in parallel to provide higher currents such as 40mA,

60mA, 80mA, and so on. The device is available in the TO-

252 (D-PAK) and TO-220 packages.

Typical Application Circuit

Simple, 220V, 20mA,

Temperature-Compensated, Constant Current,

LED Driver IC

VA

VB

Up to 220V

+ V

VA

VB

Functional

Circuit Diagram

CL220

I

LED

20mA

Control Circuit

and Temperature

Compensation

10nF

+

V

LED(TOTAL)

–