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Power Management ICs,

Power Management ICs: XENON Photoflash Cap Charger with IGBT Driver

when this product is updated

A8724
Photoflash Capacitor Charger with Flexible Current Limit and 55 V Power DMOS Switch

Data sheet

• Contact Allegro Marketing

Features

• Wide battery voltage range: 1.5 to 11 V
• Low quiescent current draw (1 µA max in shutdown mode)
• Flexible current limit:
  • External resistor sets default current (0.7 to 1.5 A)
  • Optional single-wire current limit programming through CHARGE pin
• Rugged and compact design:
  • Integrated 55 V DMOS switch
  • ISET open/short protection
  • Open diode/secondary winding protection
  • 3 mm × 3 mm footprint
• Charge Complete indication
• Flexible IGBT driver with separate sink and source

Applications

• Digital and film camera flash
• Digital video camera flash

Description

The A8724 provides a robust Xenon photoflash solution for a wide range of cameras. Its wide battery voltage specifications allow designers to use a common device for camera using 2 or 4 cell Alkaline batteries as well as 1 or 2 cell Lithium ion batteries. Its 55 V rated integrated power switch provides ample design margin, even for the 2 cell Lithium ion battery designs.

The A8724 features a flexible current limit scheme. The current limit is set by an external resistor at ISET, allowing designers to optimize the camera performance. The A8724 is protected against open circuit and short circuit condition on the ISET pin. Once the current limit is set, it can be optionally programmed as a percentage of the set current through a single wire interface, through the CHARGE pin.

The A8724 features an integrated flexible IGBT gate driver, with independent source and sink pins.

The A8724 is available in a 10-contact 3 mm × 3 mm MLP/ TDFN package. This small, low profile (0.75 mm) package is ideal for space-constrained applications. It is lead (Pb) free, with 100% matte-tin leadframe plating.

Application Circuit

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A8724EEJTR-T	10-lead MLP	Yes	view data	-40 °C to  85 °C	new	Contact Marketing Representative

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.