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A3955SLBTR-T

更新时间： 2024-02-11 08:23:37

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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A3955SLBTR-T 数据手册

A3955

Full-Bridge PWM Microstepping Motor Driver

Description (continued)

Internalcircuitprotectionincludesthermalshutdownwithhysteresis, and a 16-lead plastic SOIC with internally fused pins (suffix ‘LB’).

transient-suppression diodes, and crossover-current protection. For both package styles, the thermally enhanced pins are at ground

Special power-up sequencing is not required.

potential and need no electrical isolation. Both packages are lead

The A3955 is supplied in a choice of two power packages; a 16-pin (Pb) free, with leadframe plating 100% matte tin.

dual-in-line plastic package with copper heat-sink tabs (suffix ‘B’),

Selection Guide

Part Number

A3955SB-T

A3955SLB-T

A3955SLBTR-T

Packing

Package

25 per tube

47 per tube

1000 per reel

16-pin DIP with exposed thermal tabs

16-pin SOICW with internally fused pins

Absolute Maximum Ratings

Characteristic

Symbol

V_BB

Notes

Rating

Units

Load Supply Voltage

Logic Supply Voltage

V_CC

7.0

–0.3 to V_CC+ 0.3

1.0

Logic/Reference Input Voltage Range

Sense Voltage

V_IN

V_S

Output current rating may be limited by duty cycle, ambient

temperature, and heat sinking. Under any set of conditions, do

not exceed the speciﬁed current rating or a junction tempera-

ture of 150°C.

Output Current, Continuous

I_OUT

±1.5

Package Power Dissipation

P_D

T_A

See graph

–20 to 85

Operating Ambient Temperature

Range S

ºC

Fault conditions that produce excessive junction temperature

will activate the device’s thermal shutdown circuitry. These

conditions can be tolerated but should be avoided.

Maximum Junction Temperature

Storage Temperature

T_J(max)

150

ºC

stg

–55 to 150

Thermal Characteristics

Characteristic

Symbol

Test Conditions*

Value

Units

B Package, single-layer PCB, 1 in². 2-oz. exposed copper

ºC/W

Package Thermal Resistance, Junction

to Ambient

R_θJA

LB Package, 2-layer PCB, 0.3 in². 2-oz. exposed copper each

side

ºC/W

Package Thermal Resistance, Junction

to Tab

R_θJT

*Additional thermal information available on Allegro website.

= 6.0°C/W

θJT

SUFFIX 'B', R

= 43°C/W

θJA

SUFFIX 'LB', R

= 67°C/W

θJA

100

125

150

TEMPERATURE IN °C

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

123 4 5 6 7...13

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