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A8439

Allegro MicroSystems
Part Number A8439
Manufacturer Allegro MicroSystems
Description Photoflash Capacitor Charger
Published Mar 14, 2007
Detailed Description www.DataSheet4U.com A8439 Photoflash Capacitor Charger with IGBT Driver and Refresh Features and Benefits ▪ ▪ ▪ ▪ ▪ ▪ ...
Datasheet PDF File A8439 PDF File

A8439
A8439

Overview
www.
DataSheet4U.
com A8439 Photoflash Capacitor Charger with IGBT Driver and Refresh Features and Benefits ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries Adjustable output voltage Auto-refresh >75% efficiency Eight-level, digitally-programmable current limit Charge complete indication Integrated IGBT driver with trigger No primary-side Schottky diode needed Low-profile package (0.
75 mm nominal height) Description The A8439 is a highly integrated IC that charges photoflash capacitors for digital and film cameras.
An integrated MOSFET switch drives the transformer in a flyback topology.
It also features an integrated IGBT driver that facilitates the flash discharge function and saves board space.
The CHARGE pin enables the A8439 and starts the charging of the output capacitor.
When the designated output voltage is reached, the A8439 stops the charging until the CHARGE pin is toggled again, or when output voltage falls below 90% of the designated value.
Pulling th...


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