STCS1APUR;STCS1APHR;STEVAL-ILL030V1;中文规格书,Datasheet资料.pdfVIP

July 2008 Rev 2 1/19 19 STCS1A 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 ■ Slope control with external cap Applications ■ LED constant current supplying for varying input voltages ■ Low voltage lighting ■ Small appliances LED lighting ■ Car LED lights Description The STCS1A 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 external capacitor allows setting the slope for the current rise from tens of microseconds to tens of milliseconds allowing reduction of EMI. An open-drain pin output provides information on load disconnection condition. Power SO-8DFN8 (3 x 3 mm) Table 1. Device summary Order codes Packages Packaging STCS1APUR DFN8 (3 x 3 mm) 3000 parts per reel STCS1APHR Power SO-8 2500 parts per reel / Contents STCS1A 2/19 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 . .