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參數(shù)資料
| 型號： | BD7905BFS |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 6CH Power Driver for CD-ROM, DVD-ROM |
| 中文描述： | 6路功率驅(qū)動器為CD - ROM，DVD - ROM光碟 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 202K |
| 代理商： | BD7905BFS |
BD7905BFS
Optical disc ICs
!
Table of measure circuit switches position 3
(V
CC
=SPV
M
=SLV
M
=12V, DV
CC
=AV
M
=5V, V
C
=1.65V, RL (SL) =8
+
47
μ
H, RL (SP) =2
+
47
μ
H, RL (ACT, LD) =8
,
SLRNF=0.5
, SPRNF=0.22
, H
=2.5V, HU
+
=2.6V, HV
+
=HW
+
=2.4V)
INPUT
VIN
1
2
RL SP
SL
IL
12/17
VIH
VIL
VOFFT
VOHFT
VOLFT
GVFT
1.65V
1.65V
±
0.25V
1.65V
3.3V
(0V)
0V
(3.3V)
H
L
H
H
H
H
H
L
H
H
H
H
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
Designation
SWITCH
CTL
Measure
point
Conditions
20log |(VO
VOFFT) /
±
0.25)|
IL
=
500mA
IL
=
500mA
20log |(VO
VOFFT) /
±
0.25)|
Check active at "H"
=
2.0
Check stand-by at "L"
=
0.5
IL
=
500mA
IL
=
500mA
IQVC
IQVC
VO
5
OUT
+
(
)
OUT
+
(
)
VO
VO
12
OUT
+
(
)
OUT
+
(
)
VO
CTL1, CTL2
VMV
C
VMV
CC
1.65V
1.65V
H
H
H
H
1
1
1
1
1
1
1
1
Check all output at V
C
=
0.7V
Check all output at V
CC
=
3.8V
OUTPUT
OUTPUT
CTL1, CTL2
VOFLD
VOHLD
VOLLD
GVLD
±
0.25V
1.65V
3.3V
(0V)
0V
(3.3V)
L
L
L
L
H
H
H
H
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
2
Actuator driver block
Loading driver block
!
Circuit operation
1. Driver control terminal 1 and 2 (pin22 and pin23)
All the drivers and spindle-drive braking mode and input output gain can be switched on/off by inputting combinations
of H-level signal (higher than 2V) and L-level signal (lower than 0.5V) to these terminals.
CTL1
(Pin22)
CTL2
(Pin23)
L
L
H
L
H
CTL1
(Pin22)
CTL2
(Pin23)
SPIN
>
V
C
input output gain (spindle driver)
SPIN
<
V
C
L
H
245mArms/V (Typ.)
1.5Arms/V (Typ.)
H
H
Forward-rotation
mode
Reverse-rotation
braking mode
Short-circuit braking
mode
Forward-rotation
mode
... ON ... OFF
1)
2)
3)
4)
Spindle
Sled
Focus
Tracking
Loading
1) Standby mode
The IC is brought into standby state, and its power dissipation can be limited.
2) Drivers muting
All the output channels except the loading are muted and their outputs are turn off.
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