BD7902CFS

Optical disc ICs

4/17

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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

19

20

21

22

23

24

25

26

27

HU

+

HU

−

HV

+

HV

−

HW

+

HW

−

HB

PGND1

U

SPVM1

V

GND

GND

GND

GND

GND

PGND2

W

SPVM2

SPRNF

FG

CTL1

CTL2

SPIN

DGND

LDIN

VC

Hall amp. U positive input

Hall amp. U negative input

Hall amp. V positive input

Hall amp. V negative input

Hall amp. W positive input

Hall amp. W negative input

Hall bias

Spindle driver power ground 1

Spindle driver output U

Spindle driver power supply 1

Spindle driver output V

GND

GND

GND

GND

GND

Spindle driver power ground 2

Spindle driver output W

Spindle driver power supply 2

Spindle driver current sense

Frequency generator output

Driver logic control input 1

Driver logic control input 2

Spindle driver input

PWM block pre-ground

Loading driver input

Reference voltage input

Pin No.

Pin name

Function

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

SLIN1

SLIN2

SLVDD

SLRNF1

SLRNF2

SLGND

SLO2

−

SLO2

+

SLO1

−

SLO1

+

AGND

GND

GND

GND

GND

GND

AVM

FCO

−

FCO

+

TKO

−

TKO

+

LDO

−

LDO

+

TKIN

FCIN

Sled driver 1 input

Sled driver 2 input

Sled driver PowerMOS pre-supply

Sled driver 1 current sense

Sled driver 2 current sense

Sled driver power ground

Sled driver 2 negative output

Sled driver 2 positive output

Sled driver 1 negative output

Sled driver 1 positive output

Ground

GND

GND

GND

GND

GND

Actuator driver block power supply

Focus driver negative output

Focus driver positive output

Tracking driver negative output

Tracking driver positive output

Loading driver negative output

Loading driver positive output

BTL pre and Loading power supply

Tracking driver input

Focus driver input

PWM block control power supply

∗ Positive/negative of the output terminals are determined in reference to those of the input terminals.