FAN8042 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN8042

5-CH Motor Driver

Fairchild Semiconductor 

6. Tray, Changer,panel Motor Drive Part

out 1

M

out 2

25

26

D

D

LEVEL SHIFT

CTL

M.S.C

15

S.W

IN

FWD

16

IN

REV

17

6.5V

V(out1,out2)

0

3.25V

VCTL

• Rotational direction control

The forward and reverse rotational direction is controlled by FWD (pin16) and REV (pin17) and the input conditions are as

follows.

INPUT

OUTPUT

FWD

REV

OUT 1

OUT 2

State

H

H

Vp

Vp

Brake

H

L

H

L

Forward

L

H

L

H

Reverse

L

L

-

-

High impedance

• Where Vp(Power reference voltage) is approximately about 3.75V at PVCC2=8V according to equation (1).

• Motor speed control (When SVCC=PVCC2=8V)

- The almost maximum torque is obtained when the VCTL is open.

- If the voltage of the pin15 is 0V, the motor will not operate.

- When the control voltage of the pin15 is between 0 and 3.25V, the differential output voltage(V(out1,out2)) is about two

times of control voltage. Hence, the control to the differential output gain is two.

- When the control voltage is greater than 3.25V, the output voltage is saturated at the 6.5V because of the output swing

limitation.

14

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