LED Driver with 1-Wire Dimming

The ISL97632 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 dynamic digital dimming capability, the ISL97632 provides a simple, reliable, and flexible solution to the backlight designers.

Features

• 1-Wire 5-Bit Digital Dimming

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

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

• Integrated Schottky Diode

• 2.4V to 5.5V input

• 86 Efficiency

• 1.4MHz Switching Frequency Allows Small LC

• Enable for Shutdown Function or Zero Brightness Setting

• 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