
Integrated Silicon Solution
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.
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