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IS31BL3233A

ISSI
Part Number IS31BL3233A
Manufacturer ISSI
Description 1.5A FLASH/TORCH LED DRIVER
Published Aug 1, 2016
Detailed Description IS31BL3233A 2MHz, 1.5A FLASH/TORCH LED DRIVER Preliminary Information September 2014 GENERAL DESCRIPTION The IS31BL32...
Datasheet PDF File IS31BL3233A PDF File

IS31BL3233A
IS31BL3233A

Overview
IS31BL3233A 2MHz, 1.
5A FLASH/TORCH LED DRIVER Preliminary Information September 2014 GENERAL DESCRIPTION The IS31BL3233A is the ideal power solution for high-power flash LEDs used with cell phone camera modules or digital still cameras.
It is a highly integrated step up DC-DC converter with very high switching frequency, fixed at 2MHz, providing a very small total solution for portable photo flash.
The IS31BL3233A has separate Flash Mode and Torch Mode enable pins for maximum flexibility.
The Flash Mode and Torch Mode LED current is programmed by external resistors respectively, making the flash LED solution simple to control.
If both enable pins are at logic high, the LED current will be programmed by the Torch Mode setting resistor.
The two LED output sinks can be shorted together externally for higher power single flash LEDs, up to 1.
5A continuous LED current.
Thermal regulation is integrated in Flash Mode to limit the IC’s temperature and continuously provide the maximum allowed output current.
Various protection features are built into the IS31BL3233A, including cycle-by-cycle input current limit protection, output over-voltage protection, LED fault (open or short) protection and thermal shutdown protection.
The IS31BL3233A is available in a RoHS compliant DFN-14 (2mm × 3mm) package.
FEATURES  Input voltage range: 2.
7V~5.
5V  Dual flash LED outputs  Drive up to total 1.
5A or 0.
75A per channel  1s time out in Flash Mode to protect LED  High efficiency up to 93% (1A, Flash Mode)  2MHz step-up converter  Independent Flash Mode enable and Torch Mode enable pins  Torch Mode dimming via PWM control  Integrated thermal regulation control  LED open/short protection  Over-voltage protection  Cycle-by-cycle inductor current limit  Pb-free package: DFN-14 (2mm×3mm)  -40C° ~ +85C° temperature range APPLICATIONS  Mobile phones  Smart phones and PDAs  Digital still cameras TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit (Torch Mode curr...


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