STCS05ADR STMicroelectronics

STCS05A 0.5 A max constant current LED driver Features Up to 40 V input voltage Less than 0.5 V voltage overhead Up to 0.5 A output current PWM dimming pin Shutdown pin SO-8 LED disconnection diagnostic Slope control with external cap Applications components solution for driving LEDs in low LED constant current supplying for varying voltage applications such as 5 V, 12 V or 24 V input voltages giving benefits in terms of precision, integration Low voltage lighting and reliability. Small appliances LED lighting The current is set with external resistor up to 0.5 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 STCS05A 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 Table 1. Device summary Order code Package Packaging STCS05ADR SO-8 2500 parts per reel July 2008 Rev 2 1/18 www.st.com 18Contents STCS05A 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