KA3027D2 Просмотр технического описания (PDF) - Fairchild Semiconductor

Номер в каталоге

Компоненты Описание

производитель

KA3027D2

4-Channel Motor Driver

Fairchild Semiconductor 

KA3027D2

5. TRAY MOTOR DRIVE CIRCUIT

1) Rotational Direction Control

- The forward and reverse rotational direction is controlled by FWD (pin

24) and REV (pin 25) inputs. Conditions are as follows.

- Vr(Power reference voltage) is (VM34-VBE) / 2

Input

FWD

REV

H

H

H

L

L

H

L

L

DO4+

Vr

H

L

Vr

Output

DO4-

Vr

L

H

Vr

State

Brake

Forward

Reverse

Brake

3

DO4+ M

2

DO4-

23 CTL

D

D

LEVEL SHIFT

M. S. C

S. W

IN

FWD

24

IN

REV

25

2) Motor Speed Control

- The motor speed is proportional to the differential voltage between the pin3(DO4+) and the pin2(DO4-).

- By applying the voltage to the pin23 of CTL, the motor speed can be controlled and it is linearly proportional to the

applied control voltage.

- When both VM3,4 and Vcc are 5V, and the applied control voltage is higher than 4V, the motor speed is not proportional

to the control voltage but the motor speed becomes constant.

- If the pin23 is opened, the motor torque becomes maximum.

- The maximum output swing is 3.8V, when VM3,4 and Vcc are 5V.

9

Share Link: