AS3635 datasheet(2/21 Pages) AMSCO

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AS3635

Xenon Flash Driver with 5V IGBT Control

www.austriamicrosystems.com/AS3635

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Datasheet

1 General Description

The AS3635 is a highly integrated photoflash charger

with build in IGBT driver.

A build in 5V charge-pump guaranties constant IGBT

drive at any battery voltage. The build in timer turns off

the charge-pump 20 seconds after charging.

In circuit fuse trimming allows to set the voltage on the

photoflash capacitor to ±3% accuracy.

The AS3635 is available in a space-saving WL-CSP

package measuring only 1.5mm x 1.5mm and operates

over the -30ºC to +85ºC temperature range.

Warning: Lethal voltages are present on applications

using AS3635! Do not operate without train-

ing to handle high voltages.

Figure 1. Typical Operating Circuit

2 Key Features

Build in 5V charge-pump for IGBT gate drive

Photoflash voltage accuracy programmable to ±3%

(in circuit One Time Programmable - OTP)

Trip voltage accuracy ±1.5%

Small Size 1.5mm x 1.5mm x 0.6mm

PCB: No microvias need

Average input current < 320mA

Few external components

- No Schottky-Diode needed

- No output voltage divider needed

Reliable Flash on/off for IGBT timing.

Charge time < 4sec @ Vbat>2.7V, CFLASH =22µF

Charge complete indicator

Undervoltage lockout

Available in a tiny WL-CSP Package

3x3 balls 0.5mm pitch, 1.5x1.5mm package size

3 Applications

Xenon Flash driver for mobile phones, PDA and DSC

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AS3635

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