A3964SB Allegro Microsystems Inc, A3964SB Datasheet

A3964SB

Manufacturer Part Number

A3964SB

Description

IC MOTOR DRIVER PWM DUAL 24-DIP

Manufacturer

Allegro Microsystems Inc

Datasheets

1.A3964SB.pdf (8 pages)

2.A3964SB.pdf (10 pages)

Specifications of A3964SB

Applications

Stepper Motor Driver

Number Of Outputs

Current - Output

±800mA

Voltage - Load

5 V ~ 30 V

Voltage - Supply

4.75 V ~ 5.25 V

Operating Temperature

-20°C ~ 85°C

Mounting Type

Through Hole

Package / Case

24-DIP (0.300", 7.62mm)

Operating Current

85mA

Operating Temperature Classification

Commercial

Package Type

PDIP

Operating Supply Voltage (min)

4.75V

Operating Supply Voltage (max)

5.25V

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

A3964SB

Manufacturer:

ALLEGRO/雅丽高

Quantity:

20 000

Current page: 1 of 10
Download datasheet (95Kb)

3964

DUAL FULL-BRIDGE

PWM MOTOR DRIVER

Load Supply Voltage, V

Output Current, I

Logic Supply Voltage, V

Logic Input Voltage Range,

Sense Voltage, V

Reference Output Current,

Package Power Dissipation,

Operating Temperature Range,

Junction Temperature, T

Storage Temperature Range,

* 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.

† Fault conditions that produce excessive junction

temperature will activate the device’s thermal shutdown

circuitry. These conditions can be tolerated but should

be avoided.

ABSOLUTE MAXIMUM RATINGS

GROUND

ENABLE

SENSE

SUPPLY

PHASE

OUT

REF(IN)

LOAD

(continuous) . . . . . . . . . . . . .

REF(OUT)

. . . . . . . . . . . . . . . . . . . . See Graph

. . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . .

. . . . . . . . . . . -0.3 V to V

. . . . . . . . . . . . . . . . . . 1.0 mA

A3964SLB

OUT

. . . . . . . . . . . . . . . 1.0 V

(10 s) . . . . . .

. . . . . . . +150˚C†

. . . . . . . . . 33 V

. . . . . . . . . 7.0 V

-55˚C to +150˚C

-20˚C to +85˚C

DUAL FULL-BRIDGE PWM MOTOR DRIVER

800 mA*

Dwg. PP-047-1

OUT

LOGIC

SUPPLY

GROUND

PHASE

ENABLE

SENSE

GROUND

+ 0.3 V

REF(OUT)

1.0 A*

3964

bipolar stepper motors, the A3964SB and A3964SLB are capable of

continuous output currents to 800 mA and operating voltages to 30 V.

Internal fixed off-time PWM current-control circuitry can be used to

regulate the maximum load current to a desired value. An internal

precision voltage reference is provided to improve motor peak-current

control accuracy. The peak load current limit is set by the user’s

selection of an external resistor divider and current-sensing resistors.

RC timing networks. 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 transi-

tions. This eliminates the need for two external RC filter networks on

the current-sensing comparator inputs.

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

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

cial power-up sequencing is not required. Internal circuit protection

includes thermal shutdown with hysteresis, transient-suppression

diodes, and crossover-current protection.

sink tabs; A3964SLB is supplied in a 20-lead plastic SOIC with copper

heat sink tabs. The power tabs are at ground potential and need no

electrical isolation.

FEATURES

Always order by complete part number:

Part Number

A3964SB

A3964SLB

30 V Output Voltage Rating

Internal PWM Current Control, Saturated Sink Drivers

Internally Generated, Precision 2.5 V Reference

Internal Transient-Suppression Diodes

Internal Thermal-Shutdown Circuitry

Crossover-Current Protection, UVLO Protection

800 mA Continuous Output Current Rating

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

The fixed off-time pulse duration is set by user-selected external

For each bridge the PHASE input controls load current polarity by

The A3964SB is supplied in a 24-pin plastic DIP with copper heat

Package

24-Pin DIP

20-Lead Wide-Body SOIC

Related parts for A3964SB

A3964SB Summary of contents

Page 1

... Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover-current protection. The A3964SB is supplied in a 24-pin plastic DIP with copper heat sink tabs; A3964SLB is supplied in a 20-lead plastic SOIC with copper 1.0 A* heat sink tabs. The power tabs are at ground potential and need no electrical isolation ...

Page 2

... CONNECT. 150 Dwg. GP-049-4 CONNECT. FUNCTIONAL BLOCK DIAGRAM (A3964SLB pinning shown 2.5 V REFERENCE V REF(IN 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1997 Allegro MicroSystems, Inc. A3964SB CONNECT. OUT 2 23 OUT SENSE SENSE 1 21 OUT 4 OUT 2A 1A ...

Page 3

DUAL FULL-BRIDGE PWM MOTOR DRIVER ELECTRICAL CHARACTERISTICS & 1000 Ground (unless noted otherwise) S Characteristic Output Drivers Load Supply Voltage Range Output Sustaining Voltage Output Leakage Current Output ...

Page 4

DUAL FULL-BRIDGE PWM MOTOR DRIVER ELECTRICAL CHARACTERISTICS & 1000 Ground (unless noted otherwise) (cont.) Characteristic Symbol Control Logic Logic Supply Voltage Range Logic Input Voltage Logic Input Current Reference Output Voltage ...

Page 5

... DUAL FULL-BRIDGE PWM MOTOR DRIVER FUNCTIONAL DESCRIPTION Internal PWM Current Control. The A3964SB and A3964SLB contain a fixed off-time pulse-width modulated (PWM) current-control circuit that can be used to limit the load current to a desired value. The peak value of the current limiting ( set by the selection of an external ...

Page 6

DUAL FULL-BRIDGE PWM MOTOR DRIVER where the series resistance of the OFF T T LOAD load the motor supply voltage and t BB specified in the electrical characteristics table. When ...

Page 7

DUAL FULL-BRIDGE PWM MOTOR DRIVER If desired, the reference input voltage can be filtered by placing a capacitor from REF IN return for this capacitor as well as R dent from the high-current power-ground trace to avoid changes in ...

Page 8

... NOTES: 1. Webbed lead frame. Leads 6, 7, 18, and 19 are internally one piece. 2. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor’s option within limits shown. 4. Lead thickness is measured at seating plane or below. A3964SB Dimensions in Inches (controlling dimensions) 13 NOTE 0.100 BSC 1 ...

Page 9

DUAL FULL-BRIDGE PWM MOTOR DRIVER 0.2992 0.2914 0.020 0.013 0.0926 0.1043 0.0040 20 7.60 7.40 0.51 1 0.33 2.65 2.35 0.10 NOTES: 1. Webbed lead frame. Leads 5, 6, 15, and 16 are internally one piece. 2. Lead spacing ...

Page 10

DUAL FULL-BRIDGE PWM MOTOR DRIVER Function INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS 3-Phase Controller/Drivers Hall-Effect Latched Sensors 2-Phase Hall-Effect Sensor/Controller Hall-Effect Complementary-Output Sensor 2-Phase Hall-Effect Sensor/Driver 2-Phase Hall-Effect Sensor/Driver Hall-Effect Complementary-Output Sensor/Driver 3-Phase Back-EMF Controller/Driver 3-Phase Controller/DMOS Driver 3-Phase ...

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