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A3955SLBTR-T

更新时间： 2024-02-21 14:58:16

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
13页	423K
描述
Full-Bridge PWM Microstepping Motor Driver

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数据手册

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A3955SLBTR-T 数据手册

A3955

Full-Bridge PWM Microstepping Motor Driver

Note the A3955SB (DIP) and the A3955SLB

(SOIC) are electrically identical and share a

common terminal number assignment.

Terminal Functions

Terminal

Name

PFD

Description

(Percent Fast Decay) The analog input used to set the current-decay mode.

REF

(V_REF) The voltage at this input (along with the value of R_Sand the states of DAC inputs

D₀, D₁, and D₂) set the peak output current.

The parallel combination of external resistor R_Tand capacitor C_Tset the off time for the

PWM current regulator. C_Talso sets the blanking time.

4-5

GROUND

Return for the logic supply (V_CC) and load supply (V_BB); the reference for all voltage

measurements.

LOGIC SUPPLY (V_CC) Supply voltage for the logic circuitry. Typically = 5 V.

PHASE

D₂

The PHASE input determines the direction of current in the load.

(DATA₂) One-of-three (MSB) control bits for the internal digital-to-analog converter.

(DATA₁) One-of-three control bits for the internal digital-to-analog converter.

One-of-two output load connections.

D₁

OUT_A

SENSE

Connection to the sink-transistor emitters. Sense resistor R_Sis connected between this

point and ground.

12-13

GROUND

Return for the logic supply (V_CC) and load supply (V_BB); the reference for all voltage

measurements.

D₀

(DATA₀) One-of-three (LSB) control bits for the internal digital-to-analog converter.

One-of-two output load connections.

OUT_B

LOAD SUPPLY (V_BB) Supply voltage for the load.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

1...3 4 567 8 9...13

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