FAN8741 Fairchild Semiconductor, FAN8741 Datasheet - Page 20

• Manufacturer Part Number: FAN8741
• Manufacturer: Fairchild Semiconductor

FAN8741/FAN8742 Rev. 1.0.1
Typical Application Circuits(FAN8741G example)
R_hall1,R_hall2
Component
RSL1,RSL2
R1~R7
RSP
Bypass electrolytic capacitors(47~100 F) are recommended at power supply inputs.
Reference value
R1
R2
R3
Tilt actuator
0.33
10k
100
1
Tracking
Loading
actuator
actuator
motor
Focus
VDD (5V)
R4
R5
R6
R7
PVCC3(5~12V)
PVCC1(5~12V)
PVCC2(5~12V)
SVCC1(5V)
12
16
17
11
13
14
15
18
19
20
23
24
10
21
22
25
27
1
3
4
5
6
8
9
26
28
2
7
DGND
VCP
CP2
CP1
SVCC1
FG
DIR
SPIN
VDD
IN3
IN4
PGND5
DO4
DO4+
PVCC3
DO3
DO3+
DO2
DO2+
DO1
DO1+
PGND4
IN1
IN2
PVCC1
PVCC2
SLIN1
SLIN2
Rcs at sled driver. (I_limit=0.5A,Gain=0.5A/V@R6,R7 are 10k
Rcs at spindle driver. (I_limit=1.5A,Gain=1.5A/V@R1 is 10k
Gain scaling resistors. Please refer to 12,13,14 pages.
20
PGND1
PGND2
PGND3
MUTE1
MUTE2
SVCC2
SGND
RSP1
RSP2
RSL1
RSL2
SL1+
SL2+
SL1
SL2
HW+
HW
VM1
VM2
HU+
HU
REF
HV+
HV
VH
W
U
V
40
53
50
49
46
45
42
41
38
37
56
54
52
51
48
47
44
43
39
36
34
33
32
30
55
35
31
29
Hall bias resistors
RSL1
(SVCC2! ! ! ! PVCC1,2,3)
Remark
SVCC2(5~12V)
R_hall2
(for spindle,12V)
RSP
RSL2
HALL-U
HALL-V
HALL-W
M
(for sled, 5~12V)
VM1
BLDC Motor
Sled(stepping)
VM2
3-Phase
Motor
0.1 F
R_hall1
5V
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