A8735: Ultra Small Mobile Phone Xenon Photoflash Capacitor Charger with IGBT Driver

These parts are discontinued.  Samples are no longer available. For new customers or new applications, please contact Allegro. Date of status change: December 2, 2013.

The Allegro A8735 is a Xenon photoflash charger IC designed to meet the needs of ultra low power, small form factor cameras, particularly camera phones. 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 A8735 features very low supply current draw (0.5 µA max in shutdown mode). The IGBT driver also has internal gate resistors for minimum external component count. The charge and trigger voltage logic thresholds are set at 1 VHI(min) to support applications implementing low-voltage control logic.

The A8735 is available in an 8-contact 2 mm × 2 mm DFN/MLP package with a 0.60 maximum overall package height, and an exposed pad for enhanced thermal performance. It is lead (Pb) free with 100% matte tin leadframe plating.

DATASHEETS
SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • Ultra small 2 × 2 DFN/MLP-8 package
  • Low quiescent current draw (0.5 µA max. in shutdown mode)
  • Primary-side output voltage sensing; no resistor divider required
  • Fixed 1 A peak current limit
  • 1V logic (VHI(min)) compatibility
  • Integrated IGBT driver with internal gate resistors
  • Optimized for mobile phone, 1-cell Li+ battery applications
  • Zero-voltage switching for lower loss
  • >75% efficiency
  • Charge complete indication
  • Integrated 50 V DMOS switch with self-clamping protection

The A8735 is available in an 8-contact 2 mm × 2 mm DFN/MLP package (suffix EE) with a 0.60 maximum overall package height, and an exposed pad for enhanced thermal performance. It is lead (Pb) free with 100% matte tin leadframe plating.

EE-DFN 8 lead with exposed pad

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Product Image Functional Block Diagram Typical Applications

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A8735EEETR-T 8-lead DFN -40°C to 85°C Yes View Data Discontinued Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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