Xenon Photoflash Charger ICs feature integrated IGBT driver.
Press Release Summary:
Housed in 3 x 3 mm 10-lead MLP package, Series A843X features selectable primary-peak current settings, integrated 40 V MOSFET, and charge-complete indication. Flyback converter employs algorithm to rapidly charge photoflash capacitor to desired voltage. Models A8436 and A8438 offer 3-level, pin-selectable current limit and low-leakage feedback scheme, while Model A8439 features 8-level digitally programmable current limit and continuous-output monitoring scheme.
Original Press Release:
Allegro Microsystems Inc. Introduces Small, Flexible, Low-Cost Xenon Photoflash Charger ICs
Worcester, MA, Aug. 31, 2005 - Allegro MicroSystems, Inc. announces the release of the A8436, A8438 and A8439 Xenon Photoflash Capacitor Charger ICs with integrated IGBT driver. With selectable primary-peak current settings, an integrated 40 V MOSFET and a small 3x3 10-lead MLP package, the A8436/38/39 provide fast charge time and charge-complete indication with superior performance.
The A843x family provides a highly integrated solution for Xenon photoflash applications and features a flyback converter with an internal 40 V DMOS switch and IGBT driver. The flyback converter employs a proprietary algorithm to rapidly charge the photoflash capacitor to desired voltage. The IGBT driver features high switching speed and high drive current capability to allow efficiency switching during red-eye reduction flash mode. This device can be operated from a single Li+ battery or 2 x NiMH/alkaline batteries. When 2 x NiMH alkaline batteries are used, the device uses the IGBT drive supply as the internal bias supply.
The A8436 and A8438 feature three-level pin-selectable current limit and low-leakage feedback scheme. The A8439 features eight-level digitally programmable current limit and continuous-output monitoring scheme.
With end applications including digital cameras, camera phones and Xenon photoflash modules, the A8436/38/39 are supplied in a 3 mm x 3 mm x 0.75 mm MLP-10L package and have a eight- to 12-week leadtime to market. Pricing for 10,000 units is $0.61.
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With more than 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, including free samples of our products, can be found at www.allegromicro.com.
