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A3955SLBTR-T

更新时间： 2024-02-08 08:37:52

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

ELECTRICAL CHARACTERISTICS (continued) at T_A= 25°C, V_BB= 5 V to 50 V, V_CC= 4.5 V to

5.5 V (unless otherwise noted. )

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Control Circuitry

Logic Supply Voltage Range

Reference Voltage Range

UVLO Enable Threshold

UVLO Hysteresis

V_CC

Operating

4.5

0.5

3.35

0.30

—

5.0

—

5.5

2.5

4.05

0.60

V_REF

Operating

V_CC= 0 → 5 V

3.70

0.45

Logic Supply Current

I_CC(ON)

I_CC(OFF)

V_IN(1)

V_IN(0)

I_IN(1)

D₀= D₁= D₂= 0.8 V

—

Logic Input Voltage

Logic Input Current

2.0

—

0.8

V_IN= 2.0 V

—

<1.0

<-2.0

—

μA

I_IN(0)

V_IN= 0.8 V

—

-200

—

Mixed-Decay Comparator

Trip Points

V_PFD

Slow Current-Decay Mode

Mixed Current-Decay Mode

Fast Current-Decay Mode

3.5

1.1

—

3.1

0.8

±20

—

Mixed-Decay Comparator

Input Offset Voltage

V_IO(PFD)

—

Mixed-Decay Comparator

Hysteresis

∆V_IO(PFD)

5.0

Reference Input Current

Reference Divider Ratio

I_REF

V_REF/V_S

—

V_REF= 0 V to 2.5 V

at trip, D₀= D₁= D₂= 2 V

1.0 V < V_REF2.5 V

0.5 V < V_REF1.0 V

V_REF= 0 V

—

3.0

—

±5.0

—

μA

—

Digital-to-Analog Converter

Accuracy*

±3.0

±4.0

±5.0

—

Current-Sense Comparator

Input Offset Voltage*

V_IO(S)

—

Step Reference

Current Ratio

SRCR

D₀= D₁= D₂= 0.8 V

—

D₀= 2 V, D₁= D₂= 0.8 V

D₀= 0.8 V, D₁= 2 V, D₂= 0.8 V

D₀= D₁= 2 V, D₂= 0.8 V

D₀= D₁= 0.8 V, D₂= 2 V

D₀= 2 V, D₁= 0.8 V, D₂= 2 V

19.5

38.2

55.5

70.7

83.1

D₀= 0.8 V, D₁= D₂= 2 V

D₀= D₁= D₂= 2 V

—

92.4

100

—

Continued next page…

* The total error for the V_REF/V_Sfunction is the sum of the D/A error and the current-sense comparator input offset voltage.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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