A3966SLB

更新时间： 2024-11-16 22:21:15

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
12页	201K
描述
DUAL FULL-BRIDGE PWM MOTOR DRIVER

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A3966SLB 数据手册

3966

DUAL FULL-BRIDGE PWM

MOTOR DRIVER

The A3966SA and A3966SLB are designed to drive both windings of a

two-phase bipolar stepper motor. Each device includes two H-bridges

capable of continuous output currents of 650 mA and operating voltages to

30 V. Motor winding current can be controlled by the internal fixed-fre-

quency, pulse-width modulated (PWM), current-control circuitry. The peak

load current limit is set by the user’s selection of a reference voltage and

current-sensing resistors. Except for package style and pinout, the two

devices are identical.

A3966SLB

OUT

PHASE

ENABLE

The fixed-frequency pulse duration is set by a user-selected external

RC timing network. The capacitor in the RC timing network also determines

a user-selectable blanking window that prevents false triggering of the PWM

current-control circuitry during switching transitions.

LOGIC

GROUND

SENSE

13 GROUND

12 SENSE

OUT

11 OUT

To reduce on-chip power dissipation, the H-bridge power outputs have

been optimized for low saturation voltages. The sink drivers feature Allegro’s

patented Satlington™ output structure. The Satlington outputs combine the

low voltage drop of a saturated transistor and the high peak current capability

of a Darlington.

LOAD

SUPPLY

LOGIC

SUPPLY

REFERENCE

REF

Dwg. PP-066-1

For each bridge, a PHASE input controls load-current polarity by

selecting the appropriate source and sink driver pair. For each bridge, an

ENABLE input, when held high, disables the output drivers. Special power-

up sequencing is not required. Internal circuit protection includes thermal

shutdown with hysteresis, ground-clamp and flyback diodes, and crossover-

current protection.

ABSOLUTE MAXIMUM RATINGS

Load Supply Voltage, V_BB...................... 30 V

Output Current, I_OUT(peak) ........... 750 mA

(continuous) .............................. 650 mA

Logic Supply Voltage, V_CC.................... 7.0 V

Input Voltage, V_in........ -0.3 V to V_CC+ 0.3 V

Sense Voltage, V_S................................ 1.0 V

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

A3966SA ..................................... 2.08 W*

A3966SLB ................................... 1.87 W*

Operating Temperature Range,

The A3966SA is supplied in a 16-pin dual in-line plastic package. The

A3966SLB is supplied in a 16-lead plastic SOIC with copper heat sink tabs.

The power tab is at ground potential and needs no electrical isolation.

FEATURES

650 mA Continuous Output Current

I 30 V Output Voltage Rating

I Internal Fixed-Frequency PWM Current Control

I Satlington™ Sink Drivers

I User-Selectable Blanking Window

I Internal Ground-Clamp & Flyback Diodes

I Internal Thermal-Shutdown Circuitry

I Crossover-Current Protection and UVLO Protection

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

Junction Temperature,

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

Storage Temperature Range,

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

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.

Always order by complete part number:

Part Number

A3966SA

Package

R_θJA

R_θJC

38°C/W

—

R_θJT

—

* Per SEMI G42-88 Specification, Thermal Test Board

Standardization for Measuring Junction-to-Ambient

Thermal Resistance of Semiconductor Packages.

16-pin DIP

60°C/W

67°C/W

A3966SLB

16-lead batwing SOIC

6°C/W

12 3 4 5 6 7...12

中文翻译

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A3966SLB 替代型号

型号	品牌	替代类型	描述	数据表
A3966SLB-T	ALLEGRO	完全替代	DUAL FULL-BRIDGE PWM MOTOR DRIVER
A3966SA	ALLEGRO	完全替代	DUAL FULL-BRIDGE PWM MOTOR DRIVER

与A3966SLB相关器件

型号	品牌	获取价格	描述	数据表
A3966SLB-T	ALLEGRO	获取价格	DUAL FULL-BRIDGE PWM MOTOR DRIVER
A3966SLBTR	ALLEGRO	获取价格	Stepper Motor Controller, 0.75A, BIPolar, PDSO16, PLASTIC, SOIC-16
A3966SLBTR-T	ALLEGRO	获取价格	DUAL FULL-BRIDGE PWM MOTOR DRIVER
A3967	ALLEGRO	获取价格	MICROSTEPPING DRIVER WITH TRANSLATOR
A3967SLB	ALLEGRO	获取价格	MICROSTEPPING DRIVER WITH TRANSLATOR
A3967SLB-T	ALLEGRO	获取价格	MICROSTEPPING DRIVER WITH TRANSLATOR
A3967SLBTR	ALLEGRO	获取价格	Stepper Motor Controller, 0.85A, PDSO24, SOIC-24
A3967SLBTR-T	ALLEGRO	获取价格	Microstepping Driver with Translator
A3967SLB-TTR	ALLEGRO	获取价格	Stepper Motor Controller, 0.85A, PDSO24, LEAD FREE, SOIC-24
A3968	ALLEGRO	获取价格	Dual Full-Bridge PWM Motor Driver

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