A8436EEJTR-T

A8436EEJTR-T Datasheet

A8436 Photoflash Capacitor Charger with IGBT Driver

Part	Datasheet
A8436EEJTR-T	A8436EEJTR-T (pdf)

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A8436 Photoflash Capacitor Charger with IGBT Driver Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change December 10, 2012 Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales. NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. A8436 Photoflash Capacitor Charger with IGBT Driver Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries Adjustable output voltage >75% efficiency Three levels of switch current limit A Fast charge time Charge complete indication Integrated IGBT driver with trigger No primary-side Schottky diode needed Low-profile packages Packages: TDFN/MLP suffix EJ 10-pin, 3 mm x 3 mm nominal overall height MSOP suffix LZ 10-pin, 3 mm x 3 mm maximum overall height Approximate Scale 1:1 The A8436 is a highly integrated IC that charges photoflash capacitors for digital and film cameras. It also features an integrated IGBT driver that facilitates the flash discharge function and saves board space. To charge the photoflash capacitor, the A8436 integrates a 40 V, DMOS switch that drives the transformer in a flyback topology, allowing optimized design with tight coupling and high efficiency. A proprietary control scheme optimizes the capacitor charging time. Low quiescent current and low shutdown current further improve system efficiency and extend battery life. Three levels of switch current limit are provided and A. The level is determined by configuring the ILIM pin as grounded, floating, or pulled up to IC supply voltage, respectively. The CHARGE pin enables the A8436 and starts the charging of the output capacitor. When the designated output voltage is reached, the A8436 stops the charging until the CHARGE pin is toggled again. Pulling the CHARGE pin low stops charging. The pin is an open-drain indicator of when the designated output voltage is reached. TheA8436 can be used with twoAlkaline/NiMH/NiCAD or one single-cell Li+ battery connected to the transformer primary. Connect the VIN pin to a to V supply, which can be either the system rail or the Li+ battery, if used. The A8436 is available in a very low profile mm 10terminal 3 mm x3 mm MLP/TDFN package, making it ideal for space-constrained applications, as well as an MSOP. They are lead Pb free, with 100% matte-tin leadframe plating. VBIAS to V Two Alkaline/NiMH/NiCAD or one Li+ battery or to V VBATT VOUT One Li+ battery VBATT or to V VOUT C1 uF C2 uF 100 k7 10 k7 A N.C. VIN ILIM DONE A8436 CHARGE 10 k7 TRIGGER IGBTDRV 10 k7 To IGBT Gate COUT

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A8436 Photoflash Capacitor Charger with IGBT Driver

Discontinued Product

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.

Date of status change December 10, 2012

Recommended Substitutions:

For existing customer transition, and for new customers or new applications, contact Allegro Sales.

NOTE For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative.

A8436 Photoflash Capacitor Charger with IGBT Driver

Power with 1 Li+ or 2 Alkaline/NiMH/NiCAD batteries Adjustable output voltage >75% efficiency Three levels of switch current limit A Fast charge time Charge complete indication Integrated IGBT driver with trigger No primary-side Schottky diode needed Low-profile packages

Packages:

TDFN/MLP suffix EJ 10-pin, 3 mm x 3 mm nominal overall height

MSOP suffix LZ 10-pin, 3 mm x 3 mm maximum overall height

Approximate Scale 1:1

The A8436 is a highly integrated IC that charges photoflash capacitors for digital and film cameras. It also features an integrated IGBT driver that facilitates the flash discharge function and saves board space.

To charge the photoflash capacitor, the A8436 integrates a 40 V, DMOS switch that drives the transformer in a flyback topology, allowing optimized design with tight coupling and high efficiency. A proprietary control scheme optimizes the capacitor charging time. Low quiescent current and low shutdown current further improve system efficiency and extend battery life.

Three levels of switch current limit are provided and A. The level is determined by configuring the ILIM pin as grounded, floating, or pulled up to IC supply voltage, respectively.

The CHARGE pin enables the A8436 and starts the charging of the output capacitor. When the designated output voltage is reached, the A8436 stops the charging until the CHARGE pin is toggled again. Pulling the CHARGE pin low stops charging. The pin is an open-drain indicator of when the designated output voltage is reached.

TheA8436 can be used with twoAlkaline/NiMH/NiCAD or one single-cell Li+ battery connected to the transformer primary. Connect the VIN pin to a to V supply, which can be either the system rail or the Li+ battery, if used.

The A8436 is available in a very low profile mm 10terminal 3 mm x3 mm MLP/TDFN package, making it ideal for space-constrained applications, as well as an MSOP. They are lead Pb free, with 100% matte-tin leadframe plating.

VBIAS to V

Two Alkaline/NiMH/NiCAD or one Li+ battery
or to V

VBATT

VOUT

One Li+ battery VBATT or to V

VOUT

C1 uF

C2 uF
100 k7
10 k7

A N.C.

VIN ILIM

DONE

A8436

CHARGE
10 k7

TRIGGER

IGBTDRV
10 k7

To IGBT Gate

COUT

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A8436EEJTR-T Datasheet file may be downloaded here without warranties.

Datasheet ID: A8436EEJTR-T 516077