BD7960FM

Optical disc ICs

2/10

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Block diagram

Level shift

GND1

47k

47k

Level shift

Level shift

LD

CONT2

LD

CONT1

Level shift

T.S.D

MUTE

CH1

CH3

CH2

CH4

47k

47k

100

FR

Control

logic

RF

Control

logic

CH5

CH6

47k

47k

−+

−+

47k

47k

−

−

+

+

−+

BIAS

18

17

16

15

14

13

10

11

12

7

8

9

6

5

4

3

2

1

19

20

21

22

23

24

27

26

25

30

29

28

31

32

33

34

35

36

The resistance values are indicated in

Ω.

(CH1~4)

(POWGND)

(CH1~4)

(CH5/CH6)

GND2

(POWGND)

(CH5/CH6)

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Pin descriptions

Pin No.

Pin name

Function

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

GND2

OUT5

−

OUT5

+

IN5FWD

IN5REV

IN6REV

IN6FWD

MUTE

RESET

OPIN1

−

OP1OUT

OPIN2

−

OP2OUT

OUT2

−

OUT2

+

OUT1

−

OUT1

+

POW GND (loading driver unit)

Loading driver (CH5) output

−

Loading driver (CH5) output

+

Loading driver (CH5) FWD input

Loading driver (CH5) REV input

Loading driver (CH6) REV input

Loading driver (CH6) FWD input

BTL driver mute terminal

Reset output terminal

CH1 opamp negative input

CH1 opamp output

CH2 opamp negative input

CH2 opamp output

Supply voltage (BTL driver unit)

BTL driver (CH2) output

−

BTL driver (CH2) output

+

BTL driver (CH1) output

−

BTL driver (CH1) output

+

Pin No.

Pin name

Function

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

OUT3

+

OUT3

−

OUT4

+

OUT4

−

LDCONT2

LDCONT1

GND1

OPOUT

OPIN

−

OPIN

+

OPIN4

−

OP4OUT

OPIN3

−

OP3OUT

OUT6

+

OUT6

−

BIAS

BTL driver (CH3) output

+

BTL driver (CH3) output

−

BTL driver (CH4) output

+

BTL driver (CH4) output

−

Loading driver (CH6) voltage setting terminal

Loading driver (CH5) voltage setting terminal

POW GND (BTL driver unit)

Opamp output

Opamp negative input

Supply voltage (loading driver unit)

Opamp positive input

CH4 opamp negative input

CH4 opamp output

CH3 opamp negative input

CH3 opamp output

Loading driver (CH6) output

+

Loading driver (CH6) output

−

BIAS terminal

∗ Symbol of + and − (output of BTL driver) means polarity to opamp output pin.

For example if Opamp output voltage is H, BTL driver

+output is H, −output is L