1/3
Structure
Product series
Type
Characteristic
特
長
Silicon Monolithic Integrated Circuit
7ch Power Driver for CD,DVD±RW,DVD-RAM
BD7776ARFS
・3-phase-sensor-less
system, therefore don’t need three hall sensors.
・Output
current detection resister is not necessary with internally
equipped detection circuit.
○Absolute
maximum ratings
Parameter
POWER MOS Power supply voltage
Preblock/BTL powerblock Power supply voltage
PWM control block Power supply voltage
Power dissipation
Operating temperature range
Storage temperature
Junction temperature
Symbol
SPVM,SLVM
Vcc, AVM,LDVM
DVcc
Pd
Topr
Tstg
Tjmax
Limits
15
#1
Unit
V
V
V
15
7
1.5
＃2
W
℃
℃
℃
-20½70
-55½150
150
#1 POWER MOS output terminals (29½32, 35½37pin) is contained.
#2 PCB (70mm×70mm×1.6mm,occupied copper foil is less than 3%,glass epoxy standard board) mounting.
Reduce power by 12mW for each degree above 25℃.
○Recommended
operating conditions (Ta=-20½+70℃)
(Set the power supply voltage taking allowable dissipation into considering)
Parameter
Spindle driver powerblock power supply voltage
Sled motor driver powerblock power supply voltage
Preblock power supply voltage
Loading driver power block power supply voltage
Actuator driver powerblock power supply voltage
PWM control block power supply voltage
Spindle driver output current
Actuator/sled motor/loading motor driver output current
Symbol
SPVM
SLVM
Vcc
LDVM
AVM
DVcc
Iosp
Ioo
MIN
－
－
10.8
4.3
4.3
4.3
－
－
TYP
Vcc
#3
Vcc
#3
12
5.0
5.0
5.0
1.0
0.5
MAX
－
－
13.2
Vcc
#3
5.5
5.5
2.5
#4
0.8
Unit
V
V
V
V
V
V
A
A
#3 Set the same supply voltage to SPVM,SLVM and Vcc．
#4 The current is guaranteed 3.5A in case of the Short-circuit braking mode and the current which is turned on/off
in a duty-ratio of less than 1/10 with a maximum on-time of 5msec.
This product isn’t designed for protection against radioactive rays.
Status of this document
The Japanese version of this document is the formal specification.
A customer may use this translation version only for a reference to help reading the formal version.
If there are any differences in translation version of this document , formal version takes priority.
REV. A
○Electrical
characteristics
(Unless otherwise noted, Ta=25℃, Vcc=SPVM=SLVM=12V, DVcc=AVM=LDVM=5V, VC=1.65V, RL=8Ω, RLSP=2Ω)
2/3
Parameter
Quiescent current 1
Quiescent current 2
Quiescent current 3
Standby-on current1
Standby-on current 2
Input dead zone (one side)
Input output gain
Output ON resistor
Output limit current
PWM frequency
Input dead zone (one side)1
Input dead zone (one side)2
Input output gain H
Input output gain L
Output ON resistor
Output limit current
PWM frequency
Output offset voltage
Symbol
IQ1
IQ2
IQ3
IST1
IST2
VDZSL
gmSL
RONSL
ILIMSL
fsl
VDZSP1
VDZSP2
gmSPH
gmSPL
RONSP
ILIMSP
fsp
VOFF
VOHF
GVFH
GVFL
VOFT
VOHT
GVT
VOFTL
VOHTL
GVTL
VOFLD
VOLD1
VOLD2
GVLD
VMVC
VMVcc
MIN.
－
－
－
－
－
0
0.75
－
0.85
－
20
20
2.3
0.46
－
1.3
－
-20
－
19.6
13.6
-20
－
19.6
-50
－
19.6
-50
－
－
15.5
0.4
3.45
TYP.
14
7
6.5
0
0
20
1.0
2.2
1.0
100
55
220
3.0
0.6
1.1
1.55
167
0
0.7
21.6
15.6
0
0.7
21.6
0
0.7
21.6
0
0.6
1.9
17.5
0.7
3.85
MAX.
25
12
11
100
100
80
1.25
3.0
1.15
－
90
450
3.7
0.74
1.7
1.8
－
20
1.6
23.6
17.6
20
1.6
23.6
50
1.6
23.6
50
1.6
3.5
19.5
1.0
4.25
Unit
mA
mA
mA
μA
μA
mV
A/V
Ω
A
kHz
mV
mV
A/V
A/V
Ω
A
kHz
mV
V
dB
dB
mV
V
dB
mV
V
dB
mV
V
V
dB
V
V
IL=500mA
IL=500mA
IL=500mA
VLRPM=L
VLRPM=L
Condition
Vcc（When Loading OFF）
Vcc（When Loading ON）
DVcc
Vcc
DVcc
RSLLIM=3kΩ
IL=500mA
RSLLIM=3kΩ
Circuit
current
Sled motor
driver block
VLRPM=H
RSPLIM=1.3kΩ, VLRPM=L
RSPLIM=1.3kΩ, VLRPM=H
IL=500mA
RSPLIM=1.3kΩ
Spindle
driver block
Focus
driver block
Output saturation Voltage
Voltage gain H
Voltage gain L
Output offset voltage
Output saturation Voltage
Voltage gain
Output offset voltage
Output saturation Voltage
Voltage gain
Output offset voltage
Output saturation Voltage 1
Output saturation Voltage 2
Voltage gain
VC drop-muting
Vcc drop-muting
VLRPM=H
Tracking
driver block
Tilt
driver block
Loading
driver block
IL=500mA、LDVM=5V
IL=500mA、LDVM=12V
Others
○Package
outlines
PRODUCT NUMBER
A
BD776RFS
LOT NO.
HTSSOP-A44R (UNIT : mm)
REV. A
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
ROHM
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www.rohm.com
Copyright ©
2007 ROHM CO.,LTD.
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Appendix1-Rev2.0
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