The ISL97634 represents an efficient and highly integrated PWM boost LED driver that is suitable for LED backlighting in small size LCD panels. 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. The ISL97634 features a wide range of PWM dimming control capability. It allows dimming frequency as low as DC to 32kHz beyond audible spectrum. The ISL97634 also features a feedback disconnect switch to prevent the output from being modulated by the PWM dimming signal that minimizes system disturbance. The ISL97634 is available in the 8 Ld TDFN (2mmx3mm) package. There are 14V, 18V, and 26V OVP options that are suitable for various number of LEDs in series. The ISL97634 is specified for operation over the -40°C to +85°C ambient temperature at input voltage from 2. 4V to 5. 5V.


  • Drives Up to 26V Output
  • Integrated over-voltage protection (OVP) of 14V, 18V, and 26V for various number of LEDs in series
  • 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)


  • LED Backlighting for:
  • Cell phones
  • Smartphones
  • MP3
  • PMP
  • Automotive Navigation Panel
  • Portable GPS

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TDFN Reel 6000
Active TDFN Reel 1000
Active TDFN Reel 6000
Active TDFN Reel 1000
Active TDFN Reel 6000
Active TDFN Reel 1000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL97634 Datasheet Datasheet PDF 921 KB
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 248 KB
TB470: Using the ISL97634 White LED Driver Demo Board Other PDF 131 KB