A8731
Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver
Data sheet
zContact Allegro Marketing
Features
zPrimary side sense technology
zDual-trigger option
z3 × 3 10 pin TDFN package
Applications
zCell phone camera modules
Description
The Allegro® A8731 Xenon photoflash charger IC is designed to meet the needs of ultra-low power, small form factor cameras,
particularly camera-phones.
The charge time is adjustable by setting the charge current limit from 0.4 to 1.2 A maximum. By using primary-side voltage sensing, the
need for a secondary-side resistive voltage divider is eliminated. This has the additional benefit of reducing leakage currents on the
secondary side of the transformer. To extend battery life, the A8731 features very low supply current draw-typically 0.01 µA in
shutdown mode and 10 µA in standby mode. The A8731 has a flash dual trigger IGBT driver.
The A8731 is available in a 10-contact 3 mm × 3 mm TDFN/MLP package with a 0.75 nominal overall package height, and an exposed
pad for enhanced thermal performance.
Application Circuit
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Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be
expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
Copyright © 2009 Allegro MicroSystems, Inc. • 115 Northeast Cutoff, Worcester, MA 01606 USA • Phone: 1.508.853.5000 •
Fax: 1.508.853.7895
Complete Part Numbers
Part Number Package Type RoHS
Compliant Part Composition/
RoHS Data Temperature Comments Samples Distributor Stock
A8731EEJTR-T 10-lead MLP Yes view data -40 °C to 85 °C new Contact Local Sales Representative
or check distributor stock
Check Stock
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