A3962SLB Allegro Microsystems Inc, A3962SLB Datasheet

A3962SLB

Manufacturer Part Number

A3962SLB

Description

Manufacturer

Allegro Microsystems Inc

Datasheet

1.A3962SLB.pdf (8 pages)

Specifications of A3962SLB

Lead Free Status / Rohs Status

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3962

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

† Fault conditions that produce excessive junction

ABSOLUTE MAXIMUM RATINGS

GROUND

ENABLE

SENSE

SUPPLY

PHASE

cycle, ambient temperature, and heat sinking.

Under any set of conditions, do not exceed the

specified current rating or a junction tempera

ture of 150˚C.

temperature will activate the device’s thermal

shutdown circuitry. These conditions can be

tolerated but should be avoided.

OUT

REF(IN)

LOAD

REF OUT

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

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

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

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

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

OUT

SENSE

. . . . . . . . . .

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

. . . . . . . +150˚C†

. . . . . . . . . 30 V

. . . . . . . . . 7.0 V

-55˚C to +150˚C

-20˚C to +85˚C

DUAL FULL-BRIDGE PWM MOTOR DRIVER

Dwg. PP-047-1

OUT

LOGIC

SUPPLY

GROUND

PHASE

800 mA*

SENSE

GROUND

ENABLE

REF(OUT)

+ 0.3 V

3962

bipolar stepper motors, the A3962SLB is 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.

heat sink tabs. The power tab is at ground potential and needs no

electrical isolation.

FEATURES

Always order by complete part number: A3962SLB .

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

Automotive Capable

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 A3962SLB is supplied in a 20-lead plastic SOIC with copper

Related parts for A3962SLB

A3962SLB Summary of contents

Page 1

... Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover-current protection. The A3962SLB is supplied in a 20-lead plastic SOIC with copper heat sink tabs. The power tab is at ground potential and needs no electrical isolation. + 0.3 V ...

Page 2

DUAL FULL-BRIDGE PWM MOTOR DRIVER 2.5 2.0 1 C/W JA 1.0 0 100 TEMPERATURE in C FUNCTIONAL BLOCK DIAGRAM AND TYPICAL BIPOLAR STEPPER MOTOR APPLICATION MOTOR SUPPLY OUT 1A OUT 1B ENABLE ...

Page 3

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

Page 4

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

Page 5

... DUAL FULL-BRIDGE PWM MOTOR DRIVER FUNCTIONAL DESCRIPTION Internal PWM Current Control. The A3962SLB contains 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 current-sensing ...

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A3962SLB Allegro Microsystems Inc, A3962SLB Datasheet

A3962SLB

Specifications of A3962SLB

Available stocks

Related parts for A3962SLB

A3962SLB Summary of contents

Page 1

Page 2

Page 3

Page 4

Page 5

Page 6

Page 7

Page 8

Related keywords