Full-Bridge DMOS PWM Motor Drivers

A4952 and

A4953

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Terminal List Table

Name

Number

Function

A4952

A4953

FLTn

1

–

Fault output, active low

GND

10

1

Ground

IN1

4

3

Logic input 1

IN2

3

2

Logic input 2

LSS

8

7

Power return – sense resistor connection

OUT1

7

6

DMOS full bridge output 1

OUT2

9

8

DMOS full bridge output 2

PAD

–

–

Exposed pad for enhanced thermal dissipation

RTRY

2

–

Logic input

VBB

6

5

Load supply voltage

VREF

5

4

Analog input

Pin-out Diagrams

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Unit

Load Supply Voltage

40

V

Logic I/O Voltage Range

–0.3 to 6

V

FLTn Sink Current

10

mA

–0.3 to 6

V

Sense Voltage (LSS pin)

–0.5 to 0.5

V

Motor Outputs Voltage

–2 to 42

V

Output Current

Duty cycle = 100%

2

A

Transient Output Current

6

A

Operating Temperature Range

Temperature Range E

–40 to 85

°C

Maximum Junction Temperature

150

°C

Storage Temperature Range

–55 to 150

°C

Selection Guide

Part Number

Packing

A4952ELYTR-T

4000 pieces per 13-in. reel

A4953ELJTR-T

3000 pieces per 13-in. reel

Characteristic

Symbol

Test Conditions*

Value

Unit

Package Thermal Resistance

LJ package, on 4-layer PCB based on JEDEC standard

35

ºC/W

62

ºC/W

LY package, on 4-layer PCB based on JEDEC standard

48

ºC/W

60

ºC/W

*Additional thermal information available on the Allegro website.

8

7

6

5

1

2

3

4

OUT2

LSS

OUT1

VBB

GND

IN2

IN1

VREF

PAD

FLTn

RTRY

IN2

IN1

VREF

GND

OUT2

LSS

OUT1

VBB

1

2

3

4

5

10

9

8

7

6

PAD

LJ Package (A4953)

LY Package (A4952)