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Related Links:

Datasheets:
A3942: Quad High-Side Gate Driver for Automotive Applications (PDF)

Selection Guides:
Automotive ICs,

Power Motor Drivers

when this product is updated

Press Releases:
A3942: Allegro MicroSystems, Inc. Introduces a New Four-Channel High-Side MOSFET Control/Driver IC

A3942
Quad High-Side Gate Driver for Automotive Applications

Features

• Drives four N-channel high-side MOSFETS
• Charge pump for 100% duty cycle operation
• Serial and discrete inputs
• SPI port for control and fault diagnostics
• 4.5 to 60 V input voltage range
• Sleep function for minimum power drain
• Thin profile 38-lead TSSOP with internally fused leads for enhanced thermal dissipation
• Lead (Pb) free
• Device protection features:
  • Short-to-ground detection (latched)
  • Short-to-battery protection (latched)
  • Open load detection (latched)
  • VDD undervoltage lockout
  • VCP undervoltage lockout
  • Thermal monitor

Description

The A3942 is a highly-integrated gate driver IC that can drive up to four N-Channel MOSFETs in a high-side configuration. The device is designed to withstand the harsh environmental conditions and high reliability standards of automotive applications.

Serial Peripheral Interface (SPI) compatibility makes the device easily integrated into existing applications. The MOSFETs in such applications are typically used to drive gasoline or diesel engine management actuators, transmission actuators, body control actuators and other general-purpose automotive or industrial loads. In particular, the A3942 is suited for driving glow plugs, valves, solenoids, and other inductive loads in engine management and transmission systems.

The device is available in a 38-lead thin (1.20 mm maximum overall height) TSSOP package with six pins that are fused internally to provide enhanced thermal dissipation (package LG). It is lead (Pb) free with 100% matte tin leadframe plating.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A3942KLG-T	38-lead TSSOP	Yes	view data	-40 °C to  125 °C	new	Contact Local Sales Representative or check distributor stock
A3942KLGTR-T	38-lead TSSOP	Yes	view data	-40 °C to  125 °C	new	Contact Local Sales Representative or check distributor 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.