Intel Intersil ISL97634 Data Sheet
Summary
This efficient PWM boost LED driver is engineered for reliable backlighting solutions, driving up to seven white LEDs in series for LCD displays of 1.8” to 3.5”. It provides extensive dimming control from DC to 32kHz and features integrated protection safeguards (OVP, Schottky diode). The accompanying documentation details the device's electrical specifications, thermal characteristics, and compliance standards, making it ideal for designers creating smartphones, portable GPS units, or automotive navigation panels requiring high efficiency and low input voltage operation.
Page 1 Text Content
ISL97634
Data Sheet March 7, 2008 FN6264.3
White LED Driver with Wide PWM Features Dimming Range
Drives Up to 7 LEDs in Series (3.5V/20m A type)
The ISL97634 represents an efficient and highly integrated
OVP (14V, 18V, and 26V for 3, 4 and 7 LEDs Applications)
PWM boost LED driver that is suitable for 1.8” to 3.5” LCDs
that employ 2 to 7 white LEDs for backlighting. With PWM Dimming Control From DC to 32k Hz
integrated Schottky diode, OVP, and wide range of PWM
Output Disconnect Switch
dimming capability, the ISL97634 provides a simple, reliable,
Integrated Schottky Diode
and flexible solution to the backlight designers.
2.4V to 5.5V Input
The ISL97634 features a wide range of PWM dimming control capability. It allows dimming frequency as low as DC 85% Efficiency to 32k Hz beyond audible spectrum. The ISL97634 also
1.4MHz Switching Frequency Allows Small LC
features a feedback disconnect switch to prevent the output
from being modulated by the PWM dimming signal that 1µA Shutdown Current
minimizes system disturbance.
Internally Compensated
The ISL97634 is available in the 8 Ld TDFN (2mmx3mm) 8 Ld TDFN (2mmx3mm) package. There are 14V, 18V, and 26V OVP options that are
Pb-Free (Ro HS Compliant)
suitable for 3 LEDS, 4 LEDs, and 7 LEDs (3.5V/20m A type) backlight applications respectively. The ISL97634 is
Applications
specified for operation over the -40°C to +85°C ambient
temperature at input voltage from 2.4V to 5.5V. LED Backlighting for: Cell phones
Pinout Smartphones
ISL97634
www.BDTIC.com/Intersil MP3
(8 LD TDFN)
TOP VIEW
Automotive Navigation Panel Portable GPS
8GND LX
VIN VOUT
Ordering Information
PWM/EN FBSW
PART PACKAGE PKG.
NC FB NUMBER PART (Pb-free) DWG.
(Note) MARKING Tape & Reel
ISL97634IRT14Z-T ELE 8 Ld 2x3 TDFN L8.2x3A
Typical Application Circuit ISL97634IRT14Z-TK ELE 8 Ld 2x3 TDFN L8.2x3A
10µH or 22µH ISL97634IRT18Z-T ELF 8 Ld 2x3 TDFN L8.2x3A
ISL97634IRT18Z-TK ELF 8 Ld 2x3 TDFN L8.2x3A
LX ISL97634IRT26Z-T ELG 8 Ld 2x3 TDFN L8.2x3A
ISL97634IRT26Z-TK ELG 8 Ld 2x3 TDFN L8.2x3A
PWM/EN VOUT
*Please refer to TB347 for details on reel specifications
NC NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach FBSW materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is Ro HS compliant and compatible with both Sn Pb and Pb-free soldering operations. Intersil Pb-free products are MSL
GND classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020..
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006-2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Page Summary Contents For Intel Intersil ISL97634 Data Sheet
Manual Details
| Brand | Intel |
|---|---|
| Pages | 10 |
| File Size | 441.34 KB |
| Published | May 29, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the operational temperature range for this driver?
It is guaranteed to operate over an ambient temperature range of -40°C to +85°C.
How can the device dim the backlight LEDs?
It offers wide PWM dimming control from DC down to 32kHz, with high efficiency (up to 85%).
What types of LED applications does the ISL97634 support?
It supports white LED backlighting for up to 7 LEDs in series across multiple product categories like cell phones and navigation panels.
What are the different input voltage options?
The ISL97634 can operate with a wide input voltage range of 2.4V to 5.5V.