SP7686A Datasheet | Sipex Corporation

FEATURES Output current up to 500m A Up to 94% efficiency in 1x mode Built-in LED current setting DAC One line serial interface 2.4MHz switching frequency FB Reference voltage adjusts in 10m V steps from 60m V to 360m V DAC signal shutdown control Power-saving shutdown mode of 10n A PWM brightness control for DAC Fast turn-on (<150µs) 3.5s Timeout function to protect the LED Thermal shutdown protection Built-in over-voltage and over-current protection Fixed output versions available (SP7686A) Automatic soft start limits in-rush current Lead Free, Ro HS pliant Package: Space saving 8-pin 2x3mm DFN DESCRIPTION The SP7686 is a current regulated charge pump ideal for powering high-brightness LEDs for camera FLASH applications of up to 500m A. The charge pump automatically switches between step-up and step-down modes ensuring that the LED current does not depend on the forward voltage. A low current sense reference voltage (60m V to 360m V) allows the use of small 0603 current sensing resistors. The SP7686 has a DAC programmable feedback reference voltage allowing the user to precisely set FLASH and TORCH output current levels, while the fixed version SP7686A has set levels of FLASH and TORCH reference voltage. Both parts have over-voltage, overcurrent, over-temperature and FLASH time-out protection features . The SP7686 is offered in the 2x3mm 8-pin DFN package. TYPICAL APPLICATION CIRCUITS 0.22u F VIN 10u F CTRL SP7686 VIN C1 C2 CTRL C2 2.2u F FB SGND 0.68Ω 500m A SP7686 PGND SGND 0.22u F VIN 10u F FLASH EN VIN C1 C2 C2 2.2u F FB PGND 0.33Ω 500m A FLAS EN Jul16-07 Rev P SP7686: 500m A LED Driver  2007 Sipex Corporation -1- .. These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. A ABSOLUTE MAXIMUM RATINGS VIN,……………………………...