SP7618

www.DataSheet4U.com Solved by SP7618 TM Constant Current LED Driver ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ FEATURES Very low dropout voltage (100mV @ 1A) Accurate current regulation down to dropout voltage No external components Built-in current DAC Output current adjustable with 33.3 mA/steps Power-saving shutdown mode of 1µA Fast turn-on (<50µs) Timeout function to protect the LED Thermal Shutdown protection 1A current capability RoHS compliant, Lead Free packaging: Space saving 2mmx3mm 8pin DFN LED LED VCC EN 1 2 3 4 SP7618 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 Keyboard Backlight GENERAL DESCRIPTION The SP7618 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 for a range of input voltages. The SP7618 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 adjusted up to 1033mA with an external clock applied to the CTRL pin. The built-in thermal protection automatically stops LED current to prevent overheating. A timeout function serves as a failsafe, shutting down the output for currents greater than 266mA after 4 seconds of continuous operation if the enable input is not cycled. The part can be...