CL1
Simple, 90V, 20mA, Temperature Compensated,
Constant Current, LED Driver IC
Features
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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
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No external components (two terminal device)
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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. 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.
Applications
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LED driver
Industrial lamp indicators
Signage
Accent lighting
Automotive
Constant current source
Constant current sink
Typical Application Circuit
VA
Functional Circuit Diagram
CL1
Up to 90V
+V
LED(total)
I
LED
20mA
VB
VA
+
V
LED(total)
Control Circuit
and Temperature
Compensation
-
VB
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
SUPERTEX [ Supertex, Inc ]
