This part is discontinued. Samples are no longer available.
Date of status change: March 4, 2013.
Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales.
The A8425 charges photoflash capacitors for digital cameras, camcorders, and DSC combos. An integrated 55 V DMOS switch drives the transformer in a flyback topology optimized for 2-cell Li+ battery input. An integrated IGBT driver with separate source and sink pins allows high performance red-eye reduction implementation.
The A8425 offers programmable peak switch current limit from 1.0 to 3.2 A, continuously adjustable using a resistor to ground. A proprietary control scheme optimizes the capacitor charging time. Low quiescent current and low shutdown current further improve system efficiency and extend battery life.
The A8425 is available in 16-contact 3 mm × 3 mm TQFN packages. This small, very thin profile (0.75 mm nominal overall height) package is ideal for space-constrained applications. It is lead (Pb) free, with 100% matte-tin leadframe plating.
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.