4

HIP4020

FIGURE 1. TYPICAL MOTOR CONTROL APPLICATION CIRCUIT SHOWING DIRECTIONAL AND BRAKING CONTROL

B1

B2

ENB

A1

A2

ENA

V+

OUTA

OUTB

BRAKE

ON

OFF

DIRECTION

ENABLE

(LOGIC

GROUND)

LOAD

ILF

Q1

Q3

Q2

Q4

D1

D3

D4

D2

CONTROL

LOGIC A

V-

CONTROL

LOGIC B

TRUTH TABLE

SWITCH DRIVER A

SWITCH DRIVER B

INPUTS

OUTPUT

INPUTS

OUTPUT

A1

A2

ENA

OUTA

B1

B2

ENB

OUTB

HL

H

OH

L

L

H

OH

LL

H

OL

H

L

H

OL

HH

H

OL

L

H

H

OL

LH

H

OL

H

H

H

OL

XX

L

Z

XX

L

Z

L = Low logic level; H = High logic level

Z = High Impedance (off state)

OH = Output High (sourcing current to the output terminal)

OL = Output Low (sinking current from the output terminal)

X = Don’t Care

SWITCHING WAVEFORMS

50%

50%

50%

50%

10%

90%

10%

90%

FIGURE 2.