CL1_09 Datasheet, PDF (1/7 Pages) Supertex, Inc – Simple 90V 20mA Temperature Compensated Constant Current LED Driver IC

CL1
Simple, 90V, 20mA, Temperature Compensated,
Constant Current, LED Driver IC
Features
► 5.0 to 90V operating range (V_A-B)
► 20mA ±5% at 45V (V_A-B)
► -8.5µA/°C typical temperature coefficient
► Available in 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
General Description
The Supertex CL1 is a high voltage, temperature compensated,
constant current source. The device is trimmed to provide a
constant current of 20mA±5% at an input voltage of 45V. 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 CL1 is to drive LEDs with a constant
current of 20mA. Multiple CL1s 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
VA
Up to 90V
+ V_LED(total)
CL1
VB
I_LED
20mA
+
V_LED(total)
-
Functional Circuit Diagram
VA
Control Circuit
and Temperature
Compensation
VB
● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: [phone] ● www.supertex.com