IS31BL3231 Datasheet, PDF (1/9 Pages) Integrated Silicon Solution, Inc – FLASH LED DRIVER

IS31BL3231
FLASH LED DRIVER
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.
January 2012
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
Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any
time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are
advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the
product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not
authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com
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Rev. A, 01/03/2011