Datasheet > A5985GETTR-T

A5985GETTR-T

更新时间： 2024-09-20 01:17:51

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
26页	594K
描述
DMOS Microstepping Driver with Translator

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中文翻译

获取价格

数据手册

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A5985GETTR-T 数据手册

A5985

DMOS Microstepping Driver with Translator

and Overcurrent Protection

FEATURES AND BENEFITS

DESCRIPTION

• Drop-in replacement for A4988

• Proprietary Adaptive Percent Fast Decay option

• Low R_DS(on)outputs

• Single supply

• Microstepping up to 32 microsteps per full step

• Full torque step modes

The A5985 is a complete microstepping motor driver with

built-in translator for easy operation. It is designed to operate

bipolar stepper motors from full-step up to 1/32 step modes.

Step modes are selectable by MSx logic inputs. It has an output

drive capacity of up to 40 V and ±2 A.

• Short-to-ground protection

• Shorted load protection

• Short-to-battery protection

• Fault output

• Low current Sleep mode, < 10 µA

• Thin profile QFN

• Thermal shutdown circuitry

• Synchronous rectification for low power dissipation

• Internal UVLO

A5985 introduces a proprietary Adaptive Percent Fast Decay

(APFD) algorithm to optimize the current waveform over a

widerangeofstepperspeedsandsteppermotorcharacteristics.

APFD adjusts on-the-fly the amount of fast decay during a

PWM cycle to keep current ripple at a low level over the

various operating conditions. This adaptive feature improves

performance of the system resulting in reduced audible motor

noise, reduced vibration, and increased step accuracy.

The translator is the key to the easy implementation of the

A5985. Simply inputting one pulse on the STEP input drives

the motor one microstep. There are no phase sequence tables,

highfrequencycontrollines,orcomplexinterfacestoprogram.

The A5985 interface is an ideal fit for applications where a

complex microprocessor is unavailable or is overburdened.

• Crossover-current protection

APPLICATIONS

• Video Security Cameras • Robotics

• Printers

• Scanners

• ATM

• POS

Internalsynchronousrectificationcontrolcircuitryisprovided

to improve power dissipation during PWM operation. Internal

circuit protection includes: thermal shutdown with hysteresis,

undervoltage lockout (UVLO), and crossover-current

protection. Special power-on sequencing is not required.

Continued on the next page…

5 V

0.1 µF

5 kΩ

ROSC CP1

CP2 VCP

VBB1

VBB2

SLEEP

100 µF

STEP

MS1

Microcontroller or

Controller Logic

OUT1A

MS2

MS3

A5985

OUT1B

SENSE1

DIR

ENABLE

RESET

5 V

OUT2A

VREF

OUT2B

5 kΩ

SENSE2

nFAULT

GND

PAD

Typical Application Diagram

5985-DS

12 3 4 5 6 7...26

中文翻译

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