STCS1PHR STMicroelectronics

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 DFN8 (3x3 mm) PowerSO-8 LED disconnection diagnostic Applications Supplying LEDs with constant current for The current is set with external resistor up to 1.5 varying input voltages A with a 10 % precision a dedicated pin allows Low voltage lighting implementing PWM dimming. Small appliance LED lighting An open-drain pin output provides information on Car LED lights load disconnection condition. 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. 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 July 2008 Rev 8 1/17 www.st.com 17Contents STCS1 Contents 1 Application diagram . 3 2 Pin configuration . 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Timing . 7 6 Typical performance characteristics 8 7 Detail description . 9 7.1 Current setting 9 7.2 Enable 9 7.3 PWM dimming 9 7.4 Diagnostic 9 8 Application information . 10 8.1 Reverse polarity protection 10 8.2 Thermal considerations 10 9 Package mechanical data 12 10 Revision history . 16 2/17