Supertex inc.

Supertex inc.

www.supertex.com

CL2

Doc.# DSFP-CL2

C071012

Features

& TO-92 packages

Applications

General Description

The Supertex CL2 is a high voltage, temperature compensated,

constant current source. The device is trimmed to provide

a constant current of 20mA±10% at an input voltage of 5.0

- 90V. The device can be used as a two terminal constant

current source or constant current sink.

Atypical application for the CL2 is to drive LEDs with a constant

current of 20mA. Multiple CL2s can also be used in parallel to

provide higher currents such as 40mA, 60mA or 80mA. The

device is available in TO-243AA (SOT-89), TO-252 (D-PAK),

and TO-92 packages.

Typical Application Circuit

Simple 90V, 20mA, Temperature Compensated

Constant Current LED Driver IC

VA

VB

Up to 90V

+ V

LED(total)

+

V

LED(total)

-

VA

VB

Functional Circuit

Diagram

CL2

I

LED

<20mA

Control Circuit

and Temperature

Compensation

100nF