1

Initial Release

Simple 90V 20mA Temperature Compensated

Constant Current LED Driver IC

Features

20mA ±10% at 5-90V

0.01% / °C Typical Temperature

Coefficient

TO-243AA (SOT-89), TO-252 (D-PAK),

& TO-92 packages

No external components (two terminal

device)

Can be paralleled for higher current

Applications

LED driver

Industrial lamp indicators

Signage

Accent lighting

Automotive

Constant current source

Constant current sink

Typical Application Circuit

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

5-90V.

No

external

components are required. The device can be used

as a two terminal constant current source or constant

current sink.

A typical application for the CL2 is to drive LEDs with

a constant current of 20mA. They can also be used

in parallel to provide higher currents such as 40mA,

60mA or 80mA. The device is available in SOT-89,

TO-252 (D-PAK), and TO-92 packages.

NR062905

CL2

I

LED

<20mA

CL2

Up to 90V

+V

LED(total)

+

V

LED(total)

-

Control Circuit

and Temperature

Compensation

Functional Circuit Diagram