A3958SLBTR

更新时间： 2024-01-12 13:02:55

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
10页	380K
描述
DMOS Full-Bridge PWM Motor Driver

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A3958SLBTR 数据手册

A3958

DMOS Full-Bridge PWM Motor Driver

Features and Benefits

▪ ±2 A, 50 V continuous output rating

▪ Low r_DS(on)outputs (270 mΩ, typical)

Description

Designed for pulse width modulated (PWM) current control of

DC motors, theA3958 is capable of continuous output currents

▪ Programmable mixed, fast, and slow current-decay modes

▪ Serial interface controls chip functions

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO and thermal-shutdown circuitry

▪ Crossover-current protection

to ±2 A and operating voltages to 50 V. Internal fixed off-time

PWM current-control timing circuitry can be programmed via

a serial interface to operate in slow, fast, and mixed current-

decay modes.

PHASE and ENABLE input terminals are provided for use

in controlling the speed and direction of a DC motor with

externally applied PWM-control signals. The ENABLE input

can be programmed via the serial port to PWM the bridge in

fast or slow current decay. Internal synchronous rectification

control circuitry is provided to reduce power dissipation during

PWM operation.

Packages:

Internal circuit protection includes thermal shutdown with

hysteresis, and crossover-current protection. Special power-up

sequencing is not required.

Package B, 24-pin DIP

with exposed tabs

The A3958 is supplied in a choice of two power packages, a

24-pin plastic DIP with exposed thermal tabs (package suffix

‘B’), and a 24-pin SOIC with internally fused pins (package

suffix‘LB’).Inbothcases,thepowerpinsareatgroundpotential

and need no electrical isolation. Each package type is lead (Pb)

free, with 100% matte tin leadframe.

Package LB, 24-pin SOIC

with internally fused pins

Not to scale

Functional Block Diagram

VDD

LOGIC

SUPPLY

LOAD

SUPPLY

CHARGE PUMP

BANDGAP

VREG

CHARGE

PUMP

UNDER-

VOLTAGE &

BANDGAP

REGULATOR

VDD

FAULT DETECT

CREG

TSD

CONTROL LOGIC

OUT

MODE

PHASE

ENABLE

OUT

SENSE

ZERO

CURRENT

DETECT

FIXED OFF

BLANK

DECAY

OSC

PROGRAMMABLE

PWM TIMER

CURRENT

SENSE

SLEEP

MODE

CLOCK

DATA

STROBE

REFERENCE

BUFFER &

DIVIDER

SERIAL

PORT

RANGE

REF

VREF

RANGE

Dwg. FP-048

29319.31F

12 3 4 5 6 7...10

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与A3958SLBTR相关器件

型号	品牌	描述	获取价格	数据表
A3958SLBTR-T	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3958SLB-TTR	ALLEGRO	Brushless DC Motor Controller, 2A, NMOS, PDSO24, LEAD FREE, BATWING, PLASTIC, SOIC-24	获取价格
A3959	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3959SB	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3959SB-T	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格
A3959SLB	ALLEGRO	DMOS FULL-BRIDGE PWM MOTOR DRIVER	获取价格