IS31BL3231
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. C, 06/12/2015
FLASH LED DRIVER
July 2015
GENERAL DESCRIPTION
The IS31BL3231 is a current-regulated charge pump
and ideal for powering high brightness LEDs for camera
flash and torch applications. The charge pump can be
set to regulate two current levels for FLASH and TORCH
modes. The IS31BL3231 automatically switches
between linear and boost modes ensuring that LED
current does not depend on the LED forward voltage.
IS31BL3231 provides low cost, space saving solution for
driving LED. It also integrates thermal and short circuit
protection function.
IS31BL3231 is available in DFN-10 (3mm × 3mm). It
operates from 2.7V to 5.5V over the temperature range
of -40°C to +85°C.
FEATURES
Operates from 2.7V to 5.5V
Up to 90% efficiency in Torch Mode
Output current up to 750mA
Adjustable output current in Flash Mode
Minimum external components, no external
inductor required
Automatic boost mode
Less than 1µA shutdown current
Low ripple and EMI
Over voltage protection on output
Short and over temperature protections
Available in DFN-10 (3mm × 3mm) package
APPLICATIONS
White LED backlighting
Cellular phones
Generic lighting/flash/strobe applications
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit (Torch Mode Lv1-227mA, Flash Mode 718mA)
