The STCS05A 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 0.5 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.Up to 40 V input voltageLess than 0.5 V voltage overheadUp to 0.5 A output currentPWM dimming pinShutdown pinLED disconnection diagnosticSlope control with external cap