Datasheet > A3985

A3985

更新时间： 2024-11-24 03:16:35

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
15页	447K
描述
Digitally Programmable Dual Full-Bridge MOSFET Driver

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A3985 数据手册

A3985

Digitally Programmable

Dual Full-Bridge MOSFET Driver

Features and Benefits

Description

▪ Serial interface for full digital control

▪ Dual full-bridge gate drive for N-channel MOSFETs

▪ Dual 6-bit DAC current reference

▪ Operation over 12 to 50 V supply voltage range

▪ Synchronous rectification

The A3985 is a flexible dual full-bridge gate driver suitable

for driving a wide range of higher power industrial bipolar 2-

phase stepper motors or 2-phase brushless dc motors. It can

also be used to drive two individual torque motors or solenoid

actuators.MotorpowerisprovidedbyexternalN-channelpower

MOSFETs at supply voltages from 12 to 50 V.

▪ Cross-conduction protection

▪ Adjustable mixed decay

▪ Fixed off-time PWM current control

▪ Low-current idle mode

Full digital control is provided by two serially-accessible

registers that allow programming of off-time, blank-time,

dead-time, mixed decay ratios, synchronous rectification,

master clock source selection, and division ratio and idle

mode. All internal timings are derived from a master clock

that can be generated on-chip or provided by an external

clock such as the system clock of the master controller. A

programmable divider allows for a wide range of external

system clock frequencies.

Package: 38 pin TSSOP (suffix LD)

The internal fixed off-time PWM current-control timing is

programmed via the serial interface to operate in slow, fast,

andmixedcurrent-decaymodes.Thedesiredload-currentlevel

and direction is set via the serial port with a direction bit and

two 6-bit linear DACs in conjunction with a reference voltage.

The seven bits of control allow maximum flexibility in torque

Continued on the next page…

Approximate size

Typical Application

3985-DS

12 3 4 5 6 7...15

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与A3985相关器件

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A3985SLD-T	ALLEGRO	获取价格	Digitally Programmable Dual Full-Bridge MOSFET Driver
A3985SLDTR-T	ALLEGRO	获取价格	Digitally Programmable Dual Full-Bridge MOSFET Driver
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A3986_12	ALLEGRO	获取价格	Dual Full-Bridge MOSFET Driver with Microstepping Translator
A3986SLD-T	ALLEGRO	获取价格	Dual Full-Bridge MOSFET Driver with Microstepping Translator
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