The SP769 is a linear low-side, constant-current driver designed to drive high power LEDs from an input voltage rail. The driver acts as a current source, ensuring constant LED current across a range of input voltages. The SP769 allows implementing the lowest cost LED driver for a variety of applications. Internal circuitry maintains the preset constant current output for a wide voltage range at the LED input. The LED current can be set at 200mA at torch mode or 500mA (700mA SP7619A) at flash mode by selecting CTRL pin low/high respectively. Dimming or shutdown can be done by feeding a PWM signal to the EN pin. Fast EN turn-on/off time allows for very fast dimming frequencies, completely eliminating flicker. The built-in thermal protection automatically stops LED current to prevent overheating. A timeout function serves as a fail safe, shutting down the output at 500mA (700mA) current after 4 seconds of continuous operation if the enable input is not cycled. The Enable pin should be cycled HIGH/LOW/HIGH to restart the driver. TYPICAL APPLICATION CIRCUIT