A4985 데이터 시트보기 (PDF) - Allegro MicroSystems

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A4985

DMOS Microstepping Driver with Translator And Overcurrent Protection

Allegro MicroSystems 

A4985

DMOS Microstepping Driver with Translator

And Overcurrent Protection

THERMAL CHARACTERISTICS may require derating at maximum conditions

Characteristic

Symbol

Test Conditions*

ES package; estimated, on 4-layer PCB, based on JEDEC standard

Package Thermal Resistance

RθJA ET package; estimated, on 4-layer PCB, based on JEDEC standard

LP package; on 4-layer PCB, based on JEDEC standard

Value Units

37 ºC/W

32 ºC/W

28 ºC/W

*In still air. Additional thermal information available on Allegro Web site.

Maximum Power Dissipation, PD(max)

5.5

5.0

4.5

4.0 R

3.5

3.0

QJA = 32 ºC/W

R

R

QJA = 28 ºC/W

2.5

2.0

QJA = 37 ºC/W

1.5

1.0

0.5

0.0

20 40 60 80 100 120 140 160 180

Temperature (°C)

Allegro MicroSystems, Inc.

5

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

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