BD7904FS 데이터 시트보기 (PDF) - ROHM Semiconductor
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BD7904FS Datasheet PDF : 18 Pages
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Optical disc ICs
BD7904FS
!Pin descriptions
Pin No. Pin name
Function
Pin No. Pin name
Function
1
HU+
Hall amp. U positive input
28 REGGND Regulator block ground
2
HU−
Hall amp. U negative input
29
TKOPI Tracking driver OP-AMP-input
3
HV+
Hall amp. V positive input
30 TKOPO Tracking driver OP-AMP output
4
HV−
Hall amp. V negative input
31
AVM Actuator driver block power supply
5
SPVM1 Spindle driver power supply 1
32
FCOPI Focus driver OP-AMP-input
6
HW+ Hall amp. W positive input
33 FCOPO Focus driver OP-AMP output
7
HW− Hall amp. W negative input
34
FCO− Focus driver negative output
8
CTL1 Driver logic control input 1
35
FCO+ Focus driver positive output
9
CTL2 Driver logic control input 2
36
TKO− Tracking driver negative output
10
U
Spindle driver output U
37
TKO+ Tracking driver positive output
11
V
Spindle driver output V
38
AGND Ground
12
GND GND
39
GND GND
13
GND GND
40
GND GND
14
GND GND
41
GND GND
15
GND GND
42
GND GND
16
GND GND
43
GND GND
17
PGND Spindle driver power ground
44
VCC
BTL pre and Loading power supply
18
W
Spindle driver output W
45
LDO− Loading driver negative output
19
VC
Reference voltage input
46
LDO+ Loading driver positive output
20
SPIN Spindle driver input
47
SLO− Sled driver negative output
21 SPRNF Spindle driver current sense
48
SLO+ Sled driver positive output
22
HB
Hall bias
49
SLVDD Sled driver PowerMOS pre-supply
23 SPVM2 Spindle driver power supply 2
50 SLOPO Sled driver OP-AMP output
24
DGND PWM block pre-ground
51
SLOPI Sled driver OP-AMP- input
25
DVCC PWM block control power supply
52
SLRNF Sled driver current sense
26 REGOUT Regulator output voltage pin
53
LDIN Loading driver input
27 REGNF Regulator return pin
54
FG
∗ Positive/negative of the output terminals are determined in reference to those of the input terminals.
Frequency generator output
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