A3942 Datasheet | Allegro MicroSystems

Quad High-Side Gate Driver for Automotive Applications Features AND BENEFITS - 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 PACKAGE: 38 pin TSSOP (suffix LG) 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) patibility 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. Not to scale 3942-DS, Rev. 9 MCO-0000663 Typical Application System Control Logic CP1 CP2 VDD IREF VREG CP3 CP4 VCP VBB D1 FAULTZ G1...