High Voltage 3 Phase Motor Driver

SCM1106M

3

SCM 1106 M

VBB

VCC

RS

CFO

RFO

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

HVIC 1

Drive

Circuit

UV

Detect

Drive

Circuit

Level

Shift

Input

Logic

&

Shoot

Through

Prevention

UV

Detect

O.C.

Protect

HVIC 2

Drive

Circuit

UV

Detect

Drive

Circuit

Level

Shift

Input

Logic

&

Shoot

Through

Prevention

UV

Detect

O.C.

Protect

HVIC 3

CN

VFO

M

CBOOT1

HO

HS1

LO

LS1

U

VBB

VB1

VCC1

HIN1

LIN1

COM1

FO1

CFO1

CBOOT2

HO

HS2

LO

LS2

V

VBB

VB2

VCC2

HIN2

LIN2

COM2

FO2

CFO2

CBOOT3

HO

HS3

LO

LS3

W

VBB

VB3

VCC3

HIN3

LIN3

COM3

FO3

CFO3

NOTE:

▪ All of the input pins are connected to GND with internal pull-down resistors rated at 100 kΩ, however, an external pull-down

resistor may be required to secure stable condition of the inputs if high impedance conditions are applied to them.

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

.

▪ A blanking timer is built-in to mask the noise generated on RS at turn-on.

▪ The external electrolytic capacitors should be placed as close to the IC as possible, in order to avoid malfunctions from

external noise interference. Put a ceramic capacitor in parallel with the electrolytic capacitor if further reduction of noise

susceptibility is necessary.

Typical Application Diagram

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com