BA6780 查看數據表（PDF） - ROHM Semiconductor
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BA6780 Datasheet PDF : 14 Pages
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Optical disc ICs
zMeasurement circuit
BA6780
II2 A
2
Vr2
1
SW-2
F2
A IF2
R2
A IR2
18
17
16
15
VIN
1/2
GOVERNOR DRIVER
FWD/REV CONTROLLER
THERMAL
SHUT DOWN
BA6780 / BA6780FP-Y
VIN
10µF
2
3
1
SW-3
2
3
1
0.6Ω
9Ω
V
2
VO2
SW-5
1
14
13
12
11
10
10k
DETECTOR
10k
10k
10k
10k
DRIVE BUFFER
10k
10k
Vref
3.2k
10k
10k 10k
10k
Vref
Vref
Vref
Vref
V/I
VEE
REVERSIBLE DRIVER
FWD/REV CONTROLLER
IOUT
VIN
1
2
3
4
40k 40k
VCC
VEE
Vref
5
20k
17.1k VEE
VCC
Vconst
6
7
2
IL1 A
SW-1
1
Vr1
A IF1
F1
A IR1
R1
Vreg V
A IQ
Ireg
VCC
Fig.1
DRIVE BUFFER
8
9
V
VO1
1
2
SW-4
IL1
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