IS31BL3229

IS31BL3229 8-LED BACKLIGHT DRIVER October 2012 GENERAL DESCRIPTION The IS31BL3229 with a smart charge-pump circuit is a parallel white-LED driver with eight matched 20mA current outputs. It can supply a total output current of 160mA over an input voltage range of 2.7V to 5.5V. IS31BL3229 typically draws less than 1µA when placed in shutdown, and 0.7mA when operating in the no-load and 1X mode condition. If any of the outputs are not used, leave the pin(s) unconnected. Brightness can be controlled by simple-series-control techniques and external PWM signal. IS31BL3229 is available in QFN-20 (3mm × 3mm). It operates from 2.7V to 5.5V over the temperature range of -40°C to +85°C. FEATURES              Supply voltage: 2.7V ~ 5.5V 1X, 1.5X operating mode fade in and fade out mode Output current can be 25mA 32 current level and PWM intensity control Low input current ripple, low EMI 90% high efficiency No inductors, low noise operation Over voltage protection on output Built-in thermal protection Automatic soft start Built-in thermal protection QFN-20 (3mm × 3mm ) package APPLICATIONS    Cell phone, smart phone, PDA Mp3, Mp4, PMP White LED backlighting TYPICAL APPLICATION CIRCUIT http://www.DataSheet4U.net/ Figure 1 Typical Application Circuit Note 1: PWM pin should be pulled high if modulated by EN pin only. EN pin should be pulled high if modulated with PWM pin only. Please refer to Page 8 for detail information. Note 2: The fade in and fade out mode is only ...