NOT RECOMMENDED FOR NEW DESIGNS RECOMMENDED REPLACEMENT PART ISL97634 DATASHEET ISL97632 FN9239 Rev 4.00 LED Driver with 1-Wire Dimming March 22, 2010 The ISL97632 represents an efficient and highly integrated Features PWM boost LED driver that is suitable for 1.8 to 3.5 LCDs 1-Wire 5-Bit Digital Dimming that employ 2 to 7 white LEDs for backlighting. With Drives Up to 7 LEDs in Series (3.5V/20mA type) integrated Schottky diode, OVP, and dynamic digital dimming capability, the ISL97632 provides a simple, reliable, OVP (14V, 18V and 26V for 3, 4, and 7 LEDs applications) and flexible solution to the backlight designers. Integrated Schottky Diode The ISL97632 features a simple 1-Wire digital interface that 2.4V to 5.5V input provides a 5-bit dimming control. The dimming signal adjusts 86% Efficiency the FB voltage and therefore the LED brightness in a DC 1.4MHz Switching Frequency Allows Small LC manner in 32 linear steps. An EN pin can be used to provide a zero brightness setting or shutdown power saving function. Enable for Shutdown Function or Zero Brightness Setting 1A Shutdown Current The ISL97632 is available in the 8 Ld TDFN (2mmx3mm) package. There are 14V, 18V, and 26V OVP options that are Internally Compensated suitable for 3, 4, and 7 LEDs (3.5V/20mA type) backlight 8 Ld TDFN (2mmx3mm) applications respectively. The ISL97632 is specified for Pb-Free (RoHS Compliant) operation over the -40C to +85C ambient temperature at input voltage from 2.4V to 5.5V. Applications LED backlighting for Pinout - Cell phones ISL97632 (8 LD 2x3 TDFN) - Smartphones TOP VIEW -MP3 -PMP GND LX 1 8 - Automotive Navigation Panel VIN VOUT 2 7 - Portable GPS EN 3 6 FBSW Ordering Information SDIN 4 5 FB TEMP PACKAGE PKG. PART NUMBER PART RANGE Tape and Reel DWG. (Note) MARKING (C) (Pb-Free) NO. Typical Application Circuit ISL97632IRT14ZT* ELB -40 to +85 8 Ld 2x3 TDFN L8.2x3A 10H OR 22H VIN ISL97632IRT14ZTK* ELB -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97632IRT18ZT* ELC -40 to +85 8 Ld 2x3 TDFN L8.2x3A LX VIN ISL97632IRT18ZTK* ELC -40 to +85 8 Ld 2x3 TDFN L8.2x3A ISL97632IRT26ZT* ELD -40 to +85 8 Ld 2x3 TDFN L8.2x3A EN VOUT ISL97632IRT26ZTK* ELD -40 to +85 8 Ld 2x3 TDFN L8.2x3A SDIN * Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special FBSW Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS FB GND compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN9239 Rev 4.00 Page 1 of 10 March 22, 2010ISL97632 Absolute Maximum Ratings (T = +25C) Thermal Information A Input Voltage (V ) . -0.3V to 6V Thermal Resistance (Typical, Note 1, 2) (C/W) (C/W) IN JA JC LX Voltage . -0.3V to 28V TDFN Package 70 10.5 FBSW Voltage -0.3V to 28V Maximum Junction Temperature +125C All Other Pins -0.3V to 6V Storage Temperature .-65C to +150C Pb-Free Reflow Profile .see link below Operating Conditions