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LED constant current supplying for varying
input voltages
Low voltage lighting
Small appliances LED lighting
Car LED lights
The current is set with external resistor up to 2 A
with a 鹵 10 % precision; a dedicated pin allows
implementing PWM dimming.
An open-drain pin output provides information on
load disconnection condition.
Description
The STCS2 is a BiCMOS constant current source
designed to provide a precise constant current
starting from a varying input voltage source. The
main target is to replace discrete components
solution for driving LEDs in low voltage
applications such as 5 V, 12 V or 24 V giving
benefits in terms of precision, integration and
reliability.
Table 1.
Device summary
Order code
STCS2SPR
Package
PowerSO-10
Packaging
600 parts per reel
May 2008
Rev 3
1/16
www.st.com
16