Datasheet > A3944

A3944

更新时间： 2024-11-07 12:51:19

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
31页	601K
描述
Automotive, Low-Side FET Pre-Driver

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A3944 数据手册

A3944

Automotive, Low-Side FET Pre-Driver

Description

Features and Benefits

• 6 channels

• Drives logic-level N-channel MOSFETs

• 50 mA gate drive current

• Short and open detection

• High voltage (50 V) drain feedback inputs

The A3944 is a programmable 6 channel low-side MOSFET

pre-driver suitable for use in automotive applications. Each

channel is controllable by a combination of parallel and serial

inputs and provides sufficient gate drive current to allow

PWM control up to 10 kHz, depending on the MOSFET gate

• Programmable fault timers and thresholds per channel

• UVLO and thermal warning circuitry

charge.

Each channel provides independent fault diagnostics for short

to ground and open load when in the off-state, and short to

battery when in the on-state. A short to battery can disable

the output until reset or for a programmable retry time. Each

channelprovidesindependentlyprogrammablefaultthresholds

and blanking times.

• Serial or parallel gate drive control

• Highly configurable, through SPI compatible interface

• Compact TSSOP package

Applications:

• Automotive ECU

• Automotive high-side actuators

Inadditiontochannelstatecontrol,channelfaultmasking,fault

thresholds and fault timers are programmed through the SPI

compatible serial interface. The serial interface also provides

read back of the fault status for each channel.

Package: 28-pin TSSOP with exposed

thermal pad (suffix LP)

Digital inputs and outputs are compatible with 3.3 V and 5 V

supplies.

The A3944 is supplied in a 28 lead TSSOP package (suffix

LP) with an exposed thermal pad. The package is lead (Pb)

free with 100% matte-tin leadframe plating.

Not to scale

Typical Application Diagram

Parallel

Controller

A3944

SPI

A3944-DS, Rev. 1

12 3 4 5 6 7...31

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