July 2008 Rev 8 1/17
17
STCS1
1.5 A max constant current LED driver
Features
■ Up to 40 V input voltage
■ Less than 0.5 V voltage overhead
■ Up to 1.5 A output current
■ PWM dimming pin
■ Shutdown pin
■ LED disconnection diagnostic
Applications
■ Supplying LEDs with constant current for
varying input voltages
■ Low voltage lighting
■ Small appliance LED lighting
■ Car LED lights
Description
The STCS1 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.
The current is set with external resistor up to 1.5
A with a ± 10 % precision; a dedicated pin allows
implementing PWM dimming.
An open-drain pin output provides information on
load disconnection condition.
PowerSO-8
DFN8 (3x3 mm)
Table 1. Device summary
Order codes Packages Packaging
STCS1PUR DFN8 (3 x 3 mm) 3000 parts per reel
STCS1PHR PowerSO-8 2500 parts per reel
www.st.com
