A3985SLDTR-T View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

MFG CO.

A3985SLDTR-T

Digitally Programmable Dual Full-Bridge MOSFET Driver

Allegro MicroSystems 

Prev 11 12 13 14 15

A3985

Pin-out Diagram

Digitally Programmable

Dual Full-Bridge MOSFET Driver

C2A 1

GH2A 2

S2A 3

GL2A 4

NC 5

VREG 6

VBB 7

GL1A 8

S1A 9

GH1A 10

C1A 11

C1B 12

GH1B 13

S1B 14

GL1B 15

LSS1 16

SENSE1 17

NC 18

ENABLE 19

Bridge 2

Control

Serial

Interface

Bridge 1

Control

38 C2B

37 GH2B

36 S2B

35 GL2B

34 NC

33 LSS2

32 SENSE2

31 WC

30 SDO

29 SDI

28 STR

27 SCK

26 NC

25 VDD

24 NC

23 OSC

22 NC

21 REF

20 GND

Terminal List Table

Number

Name

1

C2A

2

GH2A

3

S2A

4

GL2A

5

NC

6

VREG

7

VBB

8

GL1A

9

S1A

10

GH1A

11

C1A

12

C1B

13

GH1B

14

S1B

15

GL1B

16

LSS1

17

SENSE1

18

NC

19

ENABLE

20

GND

21

REF

22

NC

23

OSC

24

NC

25

VDD

26

NC

27

SCK

28

STR

29

SDI

30

SDO

31

WC

32

SENSE2

33

LSS2

34

NC

35

GL2B

36

S2B

37

GH2B

38

C2B

Description

Phase 2 bootstrap capacitor drive A connection

Phase 2 high-side gate drive A

Phase 2 motor connection A

Phase 2 low-side gate drive A

No internal connection

Regulator decoupling capacitor connection

Motor supply voltage

Phase 1 low-side gate drive A

Phase 1 motor connection A

Phase 1 high-side gate drive A

Phase 1 bootstrap capacitor drive A connection

Phase 1 bootstrap capacitor drive B connection

Phase 1 high-side gate drive B

Phase 1 motor connection B

Phase 1 low-side gate drive B

Phase 1 low-side source connection

Phase 1 bridge current sense input

No internal connection

Output enable

Ground

Reference voltage

No internal connection

External clock input, ROSC resistor connection

No internal connection

Logic supply voltage

No internal connection

Serial Data Clock

Serial Data Strobe

Serial Data Input

Serial Data Output

Write Configuration Enable

Phase 2 bridge current sense input

Phase 2 low-side source connection

No internal connection

Phase 2 low-side gate drive B

Phase 2 motor connection B

Phase 2 high-side gate drive B

Phase 2 bootstrap capacitor drive B connection

Allegro MicroSystems, Inc.

14

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

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