IS31BL3232-DLS2 Datasheet, PDF (1/11 Pages) Integrated Silicon Solution, Inc – FLASH LED DRIVER

IS31BL3232
FLASH LED DRIVER
May 2013
GENERAL DESCRIPTION
The IS31BL3232 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 IS31BL3232 automatically switches
between linear and boost modes ensuring that LED
current does not depend on the LED forward voltage. In
the Flash Mode the output will shut down automatically
after 1s to save energy.
IS31BL3232 provides low cost, space saving solution for
driving LED. It also integrates thermal and short circuit
protection function.
IS31BL3232 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 1.2A(1s) in Flash Mode
 Adjustable output current in Flash Mode
 Time out function with 1s for 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
 ESD HBM 8kV
 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)
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. A, 04/22/2013