SP7619A

www.DataSheet4U.comSolved by TM SP7619/19A Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout voltage (60mV@200mA) Accurate current regulation down to dropout voltage No external components Selectable output current levels: 200mA & 500mA (700mA for SP7619A) Power-saving shutdown mode of 1µA Fast turn-on (<50µs) Timeout function to protect the LED Thermal Shutdown protection RoHS compliant, Lead Free packaging: Space saving 2mmx3mm 8pin DFN LED LED VCC EN 1 2 3 4 SP7619 8 Pin DFN 8 GNDP 7 GNDP 6 GND 5 CTRL ■ ■ ■ ■ APPLICATIONS Next Generation Mobile Phones PDA, DSC, MP3 Players Handheld Computers LCD Display Modules GENERAL DESCRIPTION The SP7619 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 SP7619 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 functi...