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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 0.5
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 STCS05 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
STCS05DR
Package
SO-8
Packaging
2500 parts per reel
July 2008
Rev 4
1/16
www.st.com
16