KA9259D(KA9259HD)

9

• The external circuit is composed of the transistor(PNP), KSB772 and a capacitor(C1), 100

µF, and the capacitor is used as a

ripple eliminator and should have a good temperature characteristics.

4. Loading Motor Driver

4.1 Truth table and Operation

• The input voltages of (5V and 0V) or (0V and 5V) pairs are applied to the input pin #9 and #14 respectively.

• When the input voltages are applied to the input pin #9 and #14, then the output of the comparator is decided depends on the

input voltage status.

• As shown in the above diagram, the difference voltage,

∆V, is applied to the both terminals of the motor. The direction of

the motor is decided by the voltage difference, +

∆V and −∆V.

• The output characteristics is as follows,

- If pin # 9=5V and #14=0V, then pin # 15=+

∆V and #16= −∆V, hence the motor turn in forward direction.

- If pin # 9=0V and #14=5V, then pin # 15=

−∆V and #16=+∆V, hence the motor turn in reverse direction.

- If pin # 9=5V and #14=5V, then

∆V=0V, hence the motor stop.

- If pin # 9=0V and #14=0V, then

∆V=0V, hence the motor stop.

4.2 Loading Motor Speed Control

• If the torque of the loading motor is too low when it is used with the pin #20 open, then it should used as the above diagram.

• The desired torque could be obtained by selecting the appropriate resistor R as shown in the left diagram.

• If it is necessary, the zener diode can be used as in the right diagram.

INPUT

OUTPUT

PIN9(DI5.1)

PIN14(DI5.2)

PIN15(DO5.1)

PIN16 (DO5.2)

State

LLL

L

Brake

HLH

L

Forward

L

H

L

H

Reverse

HH

L

L

Brake

3

2

,

]

[

5

5

.

2

2

)

3

2

1

(

R

R

Where

V

V

R

R

V

REFBG

OUT

=

=

×

=

+

=

Q1

Q2

Q3

Q4

21

Buffer

Buffer

Loading Motor Driver

15

16

13

9

14

M

Level

Shift

Speed

Control

Circuit

Input

Control

Logic

DI5.1

DI5.2

20

VCC

R

D

∆V

∆V