A3958

更新时间： 2024-11-29 22:38:47

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
12页	177K
描述
DMOS FULL-BRIDGE PWM MOTOR DRIVER

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中文翻译

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数据手册

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A3958 数据手册

3958

DMOS FULL-BRIDGE PWM

MOTOR DRIVER

Designed for pulse-width modulated (PWM) current control of dc

motors, the A3958SB and A3958SLB are capable of continuous output

currents 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.

A3958SLB

VREG

CP2

CP1

RANGE

CONNECTION

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.

PHASE

OSC

21 OUT

BB 20 LOAD SUPPLY

GROUND

SENSE

GROUND

LOGIC SUPPLY

ENABLE

DATA

OUT

Internal circuit protection includes thermal shutdown with

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

sequencing is not required.

CONNECTION

MODE

CLOCK

REF

The A3958SB/SLB is supplied in a choice of two power

packages, a 24-pin plastic DIP with a copper batwing tab (package

suffix ‘B’), and a 24-lead plastic SOIC with a copper batwing tab

(package suffix ‘LB’). In both cases, the power tab is at ground

potential and needs no electrical isolation.

STROBE

Dwg. PP-069

Note that the A3958SLB(SOIC) and A3958SB

(DIP) do not share a common terminal

assignment.

FEATURES

ABSOLUTE MAXIMUM RATINGS

2 A, 50 V Continuous Output Rating

Load Supply Voltage, V_BB.................. 50 V

Output Current, I_OUT........................ 2.0 A

Logic Supply Voltage, V_DD................ 7.0 V

Input Voltage, V_IN.... -0.3 V to V_DD+ 0.3 V

Sense Voltage, V_S............................ 0.5 V

Reference Voltage, V_REF.................. 2.7 V

Package Power Dissipation (T_A= 25°C), P_D

A3958SB ................................. 3.1 W*

A3958SLB ............................... 2.2 W*

Operating Temperature Range,

I Low r_DS(on)Outputs (270 mΩ, Typical)

I Programmable Mixed, Fast, and Slow Current-Decay Modes

I Serial Interface Controls Chip Functions

I Synchronous Rectification for Low Power Dissipation

I Internal UVLO and Thermal-Shutdown Circuitry

I Crossover-Current Protection

T_A............................... -20°C to +85°C

Junction Temperature,

T_J............................................ +150°C

Storage Temperature Range,

T_S............................. -55°C to +150°C

Always order by complete part number:

Output current rating may be limited by duty cycle,

ambient temperature, and heat sinking. Under any

set of conditions, do not exceed the specified

current rating or a junction temperature of 150°C.

Part Number

A3958SB

Package

R_θJA

R_θJT

24-pin batwing DIP

24-lead batwing SOIC

40°C/W

56°C/W

6°C/W

* Per SEMI G42-88 Specification.

A3958SLB

12 3 4 5 6 7...12

中文翻译

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与A3958相关器件

型号	品牌	获取价格	描述	数据表
A3958SB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLBTR	ALLEGRO	获取价格	DMOS Full-Bridge PWM Motor Driver
A3958SLBTR-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB-TTR	ALLEGRO	获取价格	Brushless DC Motor Controller, 2A, NMOS, PDSO24, LEAD FREE, BATWING, PLASTIC, SOIC-24
A3959	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3959SB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3959SB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER

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