A8733: Mobile Phone Xenon Photoflash Capacitor Charger with IGBT Driver

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.

Date of status change: December 10, 2012.

Recommended substitution: For existing customer transition, and for new customers or new applications, contact Allegro Sales.

The Allegro® A8733 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 0.6 to 1.8 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 A8733 features very low supply current draw—typically 0.0 µA in shutdown mode.

The A8733 has a system enable pin to prevent accidental activation of CHARGE or TRIGGER signals The charge and trigger voltage logic thresholds are set at 1.1 VHI (min) to support applications implementing low voltage control logic.

The A8733 is available in a 10-contact 3 mm × 3 mm DFN package with a 0.75 mm nominal overall package height, and an exposed pad for enhanced thermal performance.

Applications

  • Mobile phone flash
  • Digital and film camera flash
DATASHEETS
SAMPLE & BUY

Astrorep Inc. (Allegro およびサンケン半導体、サンケン電源)
141 John Street, Suite 300
Babylon, NY 11702
電話: (631)422-2500
ファックス: (631)422-2504
Web: www.astrorepinc.com
電子メール: 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
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  • Low quiescent current draw (0.01 µA in shutdown mode)
  • Primary-side output voltage sensing; no resistor divider required
  • User-adjustable current limit from 0.6 to 1.8 A
  • 1.1µV logic (VHI(min)) compatibility
  • Integrated IGBT driver
  • System enable input
  • Optimized for mobile phone, 1-cell Li+ battery applications
  • Zero-voltage switching for lower loss
  • >75% efficiency
  • Regulation feature to maintain the output voltage
  • Charge complete indication
  • Integrated 40 V DMOS switch

The A8733 is available in a 10-contact 3 mm × 3 mm DFN/ MLP package (suffix EJ) with a 0.75 nominal overall package height, and an exposed pad for enhanced thermal performance.

EJ TDFN with exposed pad 10 contact

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Typical Application (2 of 2) Typical Application (1 of 2) Functional Block Diagram

部品番号の仕様およびライフサイクル ステータス

Part Number Package Type Temperature RoHS
適合
部品構成 /
RoHS データ
Comments Samples 代理店の
在庫確認
A8733EEJTR-T 10-lead DFN -40°C to 85°C Y データを見る 生産中止
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