3-Phase Power MOSFET Controller for Automotive Applications

A3935

11

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

Number

Name

Function

1

CSP

Current-sense input, positive-side

2

VDSTH

DC input, drain-to-source monitor threshold voltage

3

LSS

Gate-drive source return, low-side

4

GLC

Gate-drive C output, low-side

5

SC

Load phase C input

6

GHC

Gate-drive C output, high-side

7

CC

Bootstrap capacitor C

8

GLB

Gate-drive B output, low-side

9

SB

Load phase B input

10

GHB

Gate-drive B output, high-side

11

CB

Bootstrap capacitor B

12

GLA

Gate-drive A output, low-side

13

SA

Load phase A input

14

GHA

Gate-drive A output, high-side

15

CA

Bootstrap capacitor A

16

VREG

Gate drive supply, positive

17

VDRAIN

Kelvin connection to MOSFET high-side drains

18

VBOOST Boost supply output

Number

Name

Function

19

BOOSTS Boost switch, source

20

BOOSTD Boost switch, drain

21

GND

Ground, dc supply returns, negative

22

VBAT

Battery supply, positive

23

UVFLT

VBAT undervoltage fault output

24

OVFLT

VBAT overvoltage fault output

25

¯F¯¯A¯¯U¯¯L¯¯T¯

Active-low fault output, primary

26

ALO

Gate control input A, low-side

27

AHI

Gate control input A, high-side

28

BHI

Gate control input B, high-side

29

BLO

Gate control input B, low-side

30

CLO

Gate control input C, low-side

31

CHI

Gate control input C, high-side

32

ENABLE

Gate output enable

33

OVSET

DC input, overvoltage threshold setting for VBAT

34

CSOUT

Current-sense amplifier output

35

VDD

Logic supply, nominally +5 V

36

CSN

Current-sense input, negative-side

Pin-out Diagram

CB

GLA

SA

GHA

CA

VREG

VDRAIN

VBOOST

ALO

FAULT

OVFLT

UVFLT

VBAT

GND

BOOSTD

BOOSTS

5

6

7

8

9

10

11

12

13

14

15

16

17

18

4

3

32

31

30

29

28

33

34

LSS

GLC

SC

GHC

CC

GLB

SB

GHB

CSOUT1

OVSET

ENABLE

CHI

CLO

BLO

BHI

2

1

35

36

23

22

21

20

19

24

25

26

27

CSP

VDSTH

CSN

VDD

AHI

Terminal List