A3942KLGTR-T Datasheet, PDF (1/20 Pages) Allegro MicroSystems – A3942KLGTR-T for Automotive Applications

A3942
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)
▫ V_DD undervoltage lockout
▫ V_CP 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) 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.
Approximate Scale 1:1
3942-DS, Rev. 5
Typical Application
V_DD
System
Control
Logic
CP1 CP2
VDD
IREF
VREG
CP3 CP4
VCP
VBB
D1
FAULTZ _A3942
G1
SDO
S1
SDI
D2
CSZ
SCLK
G2
S2
RESETZ
ENB
D3
IN1
G3
IN2
S3
IN3
D4
IN4
G4
GND GND GND GND GND GND S4
V_BAT