ISL97631 - Renesas

ISL97631 White LED Boost Regulator

ISL97631 NOT RECOMMENDED FOR NEW DESIGNS RECOMMENDED REPLACEMENT PART ISL97634 White LED Boost Regulator With Integrated Schottky Diode DATASHEET FN7370 Rev 1.00 December 21, 2005 The ISL97631 represents a high efficiency, constant frequency PWM regulator with integrated boost diode and FET. Designed for use in white LED driving applications, the ISL9763.

Features

efficiencies up to 85%. It operates at 1.35MHz switching frequency and operates from an input voltage of between 2.7V and 5.5V. The maximum output voltage of 27V enables the ISL97631 to drive up to 6 LEDs in series. It is also possible to use the ISL97631 to drive LEDs in series/parallel combination for applications requiring up to 15 LEDs. Available in the 6 Ld TSOT package, the ISL97631 offers high efficiency, constant frequency operation. It is specified for operation over the -40°C to +85°C ambient temperature range. Pinout ISL97631 (6 LD TSOT) TOP VIEW VOUT 1 GND 2 LX 3 6 VIN 5 FB 4 E.