STCS2ASPR STMicroelectronics

STCS2A 2 A max constant current LED driver Features Up to 40 V input voltage Less than 0.5 V voltage overhead 10 Up to 2 A output current 1 PWM dimming pin Shutdown pin PowerSO-10 LED disconnection diagnostic Slope control with external cap Applications solution for driving LEDs in low voltage LED constant current supplying for varying applications such as 5 V, 12 V or 24 V giving input voltages benefits in terms of precision, integration and Low voltage lighting reliability. Small appliances LED lighting The current is set with external resistor up to 2 A with a 10 % precision a dedicated pin allows Car LED lights implementing PWM dimming. An external capacitor allows setting the slope for the current Description rise from tens of microseconds to tens of milliseconds allowing reduction of EMI. The STCS2A is a BiCMOS constant current source designed to provide a precise constant An open-drain pin output provides information on current starting from a varying input voltage load disconnection condition. source. The main target is to replace discrete components Table 1. Device summary Order code Package Packaging STCS2ASPR PowerSO-10 600 parts per reel July 2008 Rev 3 1/18 www.st.com 18Contents STCS2A 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 10 7.1 Current setting . 10 7.2 Enable . 10 7.3 PWM dimming . 10 7.4 Diagnostic . 11 8 Application information . 12 8.1 Reverse polarity protection 12 8.2 Thermal considerations 12 9 Package mechanical data 14 10 Revision history . 17 2/18