KA3082B 参数 Datasheet PDF下载

KA3082

3. Logic Switch Circuit

SV

CC

V2

6

Q7

Q6

Q5

V

CTL

7.4V

4

V1

5

Q4

This circuit define reference voltage of output.

When pin #5 is “H” and pin #6 is “L”,

- V1 = V

ZD

+ V

BEQ4

+ V

BEQ5

·

=

·

8.9V

- V2 = V

BEQ 7

+ V

SATQ6

·

=

·

0.87V

V1 and V2 are related with the output voltage of the motor and change according to the voltage of pin #4 (V

CTL

).

4. Drive Output Circuit

P

VCC

V1

Q1

Q4

V2

Q2

R1

V

O1

R

L

M

Q5

R2

V

O2

Q3

Q6

V

1

= 8.9V

V

2

= 0.87V

V

O1

= V

1

- V

BEQ1

- V

BEQ2

V

O2

= V

Q6SAT

V

O

= V

O1

- V

O2

= V

1

- V

BEQ1

- V

BEQ2

- V

Q6SAT

I

RL

= (V

O1

- V

O2

) / R

L

8