A8737EEJTR-T

A8737EEJTR-T Datasheet

Allegro | Product | A8737 and A8738 Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver

Part	Datasheet
A8737EEJTR-T	A8737EEJTR-T (pdf)

Related Parts	Information
A8738EEJTR-T	A8738EEJTR-T

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Allegro \| Product \| A8737 and A8738 Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver Home / Products / Part Numbers / A8737 and A8738 A8737 and A8738 Xenon Photoflash Drivers with Fixed IGBT Gate Driver Data sheet z Contact Allegro Marketing z Primary side sense technology z Fixed IGBT Drive Voltage 3 V or 5 V z 3 x 3 10 pin TDFN package z Cell phone camera modules The A8737 and A8738 Xenon photoflash charger ICs are designed to meet the needs of ultra-low power, small form factor cameras, particularly camera-phones. These devices integrate a fixed regulator to precisely control the IGBT flash current over a wide range of battery voltages. The A8737 provides regulated 5 V, and the A8738 provides 3 V, gate drive. The IGBT driver also has separate source and sink connections, for flexibility in controlling IGBT rise and fall times. The charge current time is adjustable by setting the charge current limit from to A maximum. By using primary side voltage sensing, the need for a secondary-side resistive voltage divider is eliminated. This has the additional benefit of reducing leakage currents on the secondary side of the transformer. To extend battery life, the A8737 and A8738 feature very low supply current draw-typically µA maximum in shutdown mode. The charge and trigger voltage logic thresholds are set at VHI min to support applications implementing low voltage control logic. The devices are available in a 10-contact, 3 mm x 3 mm MLP/TDFN package with exposed pad for enhanced thermal performance. It is lead Pb free, with 100% matte-tin leadframe plating. For an even smaller PCB footprint, a wafer-level chip scale package WLCSP option is available contact factory for availability . Functional Block Diagram 9/14/2009 Allegro \| Product \| A8737 and A8738 Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver Complete Part Numbers RoHS Part Composition/ Part Number Package Type Compliant RoHS Data Temperature Comments Samples A8737EEJTR-T 10-lead MLP Yes view data -40 °C to 85 °C new Contact Local Sales Representative or check distributor stock A8738EEJTR-T 10-lead MLP Yes view data -40 °C to 85 °C new Contact Local Sales Representative or check distributor stock Distributor Stock Check Stock Check Stock 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. Copyright 2009 Allegro MicroSystems, Inc. • 115 Northeast Cutoff, Worcester, MA 01606 USA • Phone • Fax: 9/14/2009

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Allegro | Product | A8737 and A8738 Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver

Home / Products / Part Numbers / A8737 and A8738

A8737 and A8738 Xenon Photoflash Drivers with Fixed IGBT Gate Driver

Data sheet
z Contact Allegro Marketing
z Primary side sense technology z Fixed IGBT Drive Voltage 3 V or 5 V z 3 x 3 10 pin TDFN package
z Cell phone camera modules

The A8737 and A8738 Xenon photoflash charger ICs are designed to meet the needs of ultra-low power, small form factor cameras, particularly camera-phones.

These devices integrate a fixed regulator to precisely control the IGBT flash current over a wide range of battery voltages. The A8737 provides regulated 5 V, and the A8738 provides 3 V, gate drive. The IGBT driver also has separate source and sink connections, for flexibility in controlling IGBT rise and fall times.

The charge current time is adjustable by setting the charge current limit from to A maximum. By using primary side voltage sensing, the need for a secondary-side resistive voltage divider is eliminated. This has the additional benefit of reducing leakage currents on the secondary side of the transformer. To extend battery life, the A8737 and A8738 feature very low supply current draw-typically µA maximum in shutdown mode.

The charge and trigger voltage logic thresholds are set at VHI min to support applications implementing low voltage control logic.

The devices are available in a 10-contact, 3 mm x 3 mm MLP/TDFN package with exposed pad for enhanced thermal performance. It is lead Pb free, with 100% matte-tin leadframe plating. For an even smaller PCB footprint, a wafer-level chip scale package WLCSP option is available contact factory for availability .

Functional Block Diagram
9/14/2009

Allegro | Product | A8737 and A8738 Mobile Phone Xenon Photoflash Driver with IGBT Gate Driver

Complete Part Numbers

RoHS Part Composition/

Part Number Package Type Compliant RoHS Data

Temperature Comments

Samples

A8737EEJTR-T 10-lead MLP Yes
view data
-40 °C to 85 °C new

Contact Local Sales Representative or check distributor stock

A8738EEJTR-T 10-lead MLP Yes
view data
-40 °C to 85 °C new

Contact Local Sales Representative or check distributor stock

Distributor Stock

Check Stock Check Stock

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.

Copyright 2009 Allegro MicroSystems, Inc.
• 115 Northeast Cutoff, Worcester, MA 01606 USA
• Phone
• Fax:
9/14/2009

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 A8737EEJTR-T Datasheet file may be downloaded here without warranties.

Datasheet ID: A8737EEJTR-T 516095