White LED Driver with Wide PWM Dimming Range

The ISL97634 represents an efficient and highly integrated PWM boost LED driver that is suitable for 1.8” to 3.5” LCDs that employ 2 to 7 white LEDs for backlighting. With integrated Schottky diode, OVP, and wide range of PWM dimming capability, the ISL97634 provides a simple, reliable, and flexible solution to the backlight designers.

Features

• Drives Up to 7 LEDs in Series (3.5V/20mA type)

• OVP (14V, 18V, and 26V for 3, 4 and 7 LEDs Applications)

• PWM Dimming Control From DC to 32kHz

• Output Disconnect Switch

• Integrated Schottky Diode

• 2.4V to 5.5V Input

• 85 Efficiency

• 1.4MHz Switching Frequency Allows Small LC

• 1µA Shutdown Current

• Internally Compensated

• 8 Ld TDFN (2mmx3mm)

• Pb-Free (RoHS Compliant)

Applications

• LED Backlighting for:

- Cell phones

- Smartphones

- MP3

- PMP

- Automotive Navigation Panel

- Portable GPS