Datasheet > A4935_13

A4935_13

更新时间： 2022-04-12 15:24:47

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
25页	450K
描述
Automotive 3-Phase MOSFET Driver

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A4935_13 数据手册

A4935

Automotive 3-Phase MOSFET Driver

Features and Benefits

Description

▪ High current 3-phase gate drive for N-channel MOSFETs

▪ Cross-conduction protection with adjustable dead time

▪ Top-off charge pump for 100% PWM

▪ Charge pump for low supply voltage operation

▪ Uncommitted current sense amplifier

▪ 5.5 to 50 V supply voltage range

The A4935 is a 3-phase controller for use with N-channel

external power MOSFETs and is specifically designed for

automotive applications.

A unique charge pump regulator provides full (>10 V) gate

drive for battery voltages down to 7 V and allows the A4935

to operate with a reduced gate drive, down to 5.5 V.

▪ Compatible with 3.3 V and 5 V logic

▪ Extensive diagnostic outputs

▪ Low-current sleep mode

A bootstrap capacitor is used to provide the above-battery

supply voltage required for N-channel MOSFETs.An internal

charge pump for the high-side drive allows DC (100% duty

cycle) operation.

Full control over all six power FETs in the 3-phase bridge is

provided,allowingmotorstobedrivenwithblockcommutation

or sinusoidal excitation. The power FETs are protected from

shoot-through by integrated crossover control and resistor-

adjustable dead time.

Package: 48-pin LQFP with exposed

thermal pad (suffix JP)

Bridge current can be measured using an integrated current

sense amplifier. This is an uncommitted differential amplifier

with a below-ground common mode range allowing it to be

used in low-side current sense applications. Gain and offset

are defined by external resistors.

Continued on the next page…

Not to scale

Typical Application

VBAT

A8450

Regulator

3-Phase

BLDC

Motor

Control

A4935

DSP

Micro-

controller

Diagnostics

Current Sense

4935-DS, Rev. 4

12 3 4 5 6 7...25

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