High Voltage 3-Phase Motor Driver

SCM1106M

3

SCM1100M

VBB

RS

CFO

RFO

CBOOT

18

17

20

19

21

22

23

24

10

9

12

11

13

14

15

16

2

1

4

3

5

6

7

8

31

32

33

28

29

30

25

26

27

Drive

Circuit

UV

Detect

Drive

Circuit

Level

Shift

Input

Logic

&

Shoot

Through

Prevention

UV

Detect

O.C.

Protect

HVIC1

HO

HS

LO

LS

VB

VCC

HIN

LIN

COM

FO

CFO

Drive

Circuit

UV

Detect

Drive

Circuit

Level

Shift

Input

Logic

&

Shoot

Through

Prevention

UV

Detect

O.C.

Protect

HVIC2

HO

HS

LO

LS

VB

VCC

HIN

LIN

COM

FO

CFO

Drive

Circuit

UV

Detect

Drive

Circuit

Level

Shift

Input

Logic

&

Shoot

Through

Prevention

UV

Detect

O.C.

Protect

HVIC3

HO

HS

LO

LS

VB

VCC

HIN

LIN

COM

FO

CFO

CN

VFO

M

CBOOT

CBOOT

Vcc

CS

Typical Application Diagram

NOTE:

▪ To use the OCP circuit, an external shunt resistor, RS, is needed. The RS value can be obtained from the formula:

▪ To avoid malfunction, the wiring between the LS and COM pins should be as short as possible.

▪ To prevent surge destruction, put a 0.01 to 1 μF snubber capacitor, CS, in parallel with the electrolytic capacitor.

▪ To prevent surge destruction, put a 18 to 20 V Zener diode between the VCC and COM pins.

▪ To prevent surge malfunction, put a 0.01 to 0.1 μF ceramic capacitor between the VCC and COM pins and the VB and HS

pins.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com