CL1 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
5.0V to 90V operating range (V_a-b)
20mA ±5% at 45V V_a-b
-8.5µA / °C Typical Temperature
Coefficient
SOT-89, 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. They can also be used
in parallel to provide higher currents such as 40mA,
60mA or 80mA. The device is available in SOT-89,
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
1