Datasheet > A5988GJPTR-1-T

A5988GJPTR-1-T

更新时间： 2024-09-20 01:03:51

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
14页	748K
描述
Quad 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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A5988GJPTR-1-T 数据手册

A5988

Quad DMOS Full-Bridge PWM Motor Driver

FEATURES AND BENEFITS

DESCRIPTION

• 40 V output rating

• 4 full bridges

• Dual stepper motor driver

• High-current outputs

• 3.3 and 5 V compatible logic

• Synchronous rectification

• Internal undervoltage lockout (UVLO)

• Thermal shutdown circuitry

• Crossover-current protection

• Overcurrent protection

• Low-power sleep mode

• Low-profile QFN package

TheA5988isaquadDMOSfull-bridgedrivercapableofdriving

up to two stepper motors or four DC motors. Each full-bridge

output is rated up to 1.6 A and 40 V. The A5988 includes fixed

off-time pulse-width modulation (PWM) current regulators,

alongwith2-bitnonlinearDACs(digital-to-analogconverters)

that allow stepper motors to be controlled in full, half, and

quarter steps, and DC motors in forward, reverse, and coast

modes. The PWM current regulator uses theAllegro^™patented

mixed decay mode for reduced audible motor noise, increased

step accuracy, and reduced power dissipation.

Internal synchronous rectification control circuitry is provided

to improve power dissipation during PWM operation.

Protection features include thermal shutdown with hysteresis,

undervoltagelockout(UVLO)andcrossover-currentprotection.

Special power-up sequencing is not required.

PACKAGES

TheA5988issuppliedintwopackages,EVandJP,withexposed

power tabs for enhanced thermal performance. The EV is a

6 mm × 6 mm, 36-pin QFN package with a nominal overall

package height of 0.90 mm. The JP is a 7 mm × 7 mm 48-pin

LQFP. Both packages are lead (Pb) free, with 100% matte-tin

leadframe plating.

Package EV, 36-pin QFN

0.90 mm nominal height

with exposed thermal pad

Package JP, 48-pin LQFP

with exposed thermal pad

Not to scale

0.1 µF

50 V

V_MOTOR32 V

50 V

0.22 µF

50 V

100 µF

50 V

* JP package only

FAULTn*

PHASE1

I01

OUT1A

OUT1B

OUT2A

OUT2B

I11

PHASE2

I02

Bipolar Stepper Motors

I12

Microprocessor

OUT3A

OUT3B

OUT4A

OUT4B

PHASE3

I03

A5988

I13

PHASE4

I04

SENSE2

I14

R_S2

R_S1

R_S3

R_S4

VREF1

VREF2

VREF3

VREF4

SLEEPn

SENSE1

SENSE3

SENSE4

V_REF

Figure 1: Typical Application Circuit

A5988-DS, Rev. 1

12 3 4 5 6 7...14

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