Pin Assignment

No. 7391-3/6

LB11651

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Top view

LB11651

Truth Table

X: H or L

PHASE

BRAKE

ST

PWM

OA

OB

Operating mode

H

L

H

H

H

L

Forward

L

L

H

H

L

H

Reverse

X

L

H

L

OFF

OFF

Output off

X

H

H

X

H

H

Brake

X

X

L or OPEN

X

OFF

OFF

Standby mode (circuits off)

Pin Functions

Pin No.

Pin

Pin function

1

OA

Output

14

OB

Output

4

VHS

High side current sensing (Insert an external resistor between VM and VHS. When the voltage across this resistor reaches 0.5 V,

the outputs are turned off.)

2

VLS

Low side current sensing (Insert an external resistor between VLS and ground. When the voltage across this resistor reaches

0.5 V, the outputs are turned off.)

7

C

Connection for an external filter capacitor that prevents incorrect operation of the current sensing output shutdown and thermal

shutdown circuits.

3

VM

Motor system power supply

5

Logic system power supply

9

PHASE

Forward/reverse switching pin

10

BRAKE

Brake control input. A high input switches the IC to brake mode.

6

ST

Standby mode control. The IC operates in standby mode when this pin is low or open.

8

PWM

PWM input. High: on

Low: off

12

R

11

GND

Ground

13

DiGND

Lower side regeneration diode ground connection