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
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.
Applications
LED driver
Industrial lamp indicators
Signage
Accent lighting
Automotive
Constant current source
Constant current sink
Typical Application Circuit
Va
Functional Circuit Diagram
Va
CL1
Up to 90V
+ V
LED(total)
I
LED
< 20mA
Vb
Control Circuit
and Temperature
Compensation
+
V
LED(total)
-
Vb
1