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Structure
Silicon Monolithic Integrated Circuit
Product series
7ch Power Driver for CD,DVD±RW,DVD-RAM
Type
BD7776ARFS
Characteristic
特
長
・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
Symbol
Limits
15
Unit
POWER MOS Power supply voltage
SPVM,SLVM
Preblock/BTL powerblock Power supply voltage
Vcc, AVM,LDVM
15
V
PWM control block Power supply voltage
DVcc
7
V
1.5
V
#1
Power dissipation
Pd
＃2
W
Operating temperature range
Topr
-20～70
℃
Storage temperature
Tstg
-55～150
℃
Junction temperature
Tjmax
150
℃
#1 POWER MOS output terminals (29～32, 35～37pin) 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=-20～+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
Symbol
MIN
TYP
MAX
Unit
SPVM
SLVM
Vcc
LDVM
AVM
DVcc
Iosp
－
－
10.8
4.3
4.3
4.3
－
Vcc#3
Vcc#3
12
5.0
5.0
5.0
1.0
－
－
13.2
Vcc #3
5.5
5.5
2.5#4
V
V
V
V
V
V
A
Ioo
－
0.5
0.8
A
Actuator/sled motor/loading motor driver output current
#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
2/3
○Electrical characteristics
(Unless otherwise noted, Ta=25℃, Vcc=SPVM=SLVM=12V, DVcc=AVM=LDVM=5V, VC=1.65V, RL=8Ω, RLSP=2Ω)
Parameter
Circuit
current
Sled motor
driver block
Symbol
MIN.
TYP.
MAX.
Unit
Quiescent current 1
IQ1
－
14
25
mA
Quiescent current 2
IQ2
－
7
12
mA
Vcc（When Loading ON）
Quiescent current 3
IQ3
－
6.5
11
mA
DVcc
Standby-on current1
IST1
－
0
100
μA
Vcc
Standby-on current 2
IST2
－
0
100
μA
DVcc
Input dead zone (one side)
VDZSL
0
20
80
mV
Input output gain
gmSL
0.75
1.0
1.25
A/V
RSLLIM=3kΩ
Output ON resistor
RONSL
－
2.2
3.0
Ω
IL=500mA
Output limit current
ILIMSL
0.85
1.0
1.15
A
RSLLIM=3kΩ
fsl
－
100
－
kHz
Input dead zone (one side)1
VDZSP1
20
55
90
mV
VLRPM=L
Input dead zone (one side)2
VDZSP2
20
220
450
mV
VLRPM=H
Input output gain H
gmSPH
2.3
3.0
3.7
A/V
RSPLIM=1.3kΩ, VLRPM=L
Input output gain L
gmSPL
0.46
0.6
0.74
A/V
RSPLIM=1.3kΩ, VLRPM=H
Output ON resistor
RONSP
－
1.1
1.7
Ω
IL=500mA
Output limit current
ILIMSP
1.3
1.55
1.8
A
RSPLIM=1.3kΩ
fsp
－
167
－
kHz
Output offset voltage
VOFF
-20
0
20
mV
Output saturation Voltage
VOHF
－
0.7
1.6
V
Voltage gain H
GVFH
19.6
21.6
23.6
dB
VLRPM=L
Voltage gain L
GVFL
13.6
15.6
17.6
dB
VLRPM=H
Output offset voltage
VOFT
-20
0
20
mV
Output saturation Voltage
VOHT
－
0.7
1.6
V
GVT
19.6
21.6
23.6
dB
Output offset voltage
VOFTL
-50
0
50
mV
Output saturation Voltage
VOHTL
－
0.7
1.6
V
GVTL
19.6
21.6
23.6
dB
Output offset voltage
VOFLD
-50
0
50
mV
Output saturation Voltage 1
VOLD1
－
0.6
1.6
V
IL=500mA、LDVM=5V
Output saturation Voltage 2
VOLD2
－
1.9
3.5
V
IL=500mA、LDVM=12V
Voltage gain
GVLD
15.5
17.5
19.5
dB
PWM frequency
Spindle
driver block
PWM frequency
Focus
driver block
Tracking
driver block
Tilt
driver block
Loading
driver block
Others
Condition
Vcc（When Loading OFF）
Voltage gain
Voltage gain
VC drop-muting
VMVC
0.4
0.7
1.0
V
Vcc drop-muting
VMVcc
3.45
3.85
4.25
V
IL=500mA
IL=500mA
IL=500mA
○Package outlines
BD776RFS
A
PRODUCT NUMBER
LOT NO.
HTSSOP-A44R (UNIT : mm)
REV. A
3/3
○Block diagram / Application circuit
FG
FG
100k
SPGND
5V
V
Logic
W
BEMF
DETECTER CURR.
LEVEL
SHIFT
Vin/1600
U
SPVM
12V
C_COM
C_OUT
OSC
SLO2-
PRE
Logic
SLO2+
FF
SLLIM
LEVEL
SHIFT
Vin/533
SLIN2
PRE
Logic
SLO1-
LEVEL
SHIFT
Vin/533
FF
SLIN1
SLO1+
CURR.
FEED
Io/533
RSLLIM
3kΩ
SLIN2
CURR.
LIMIT
SLVM
12V
SPIN
SPIN
CURR.
FEED
Io/533
SLGND
12V
RSPLIM
1.3kΩ
CURR.
FEED
Io/1600
COM
M
SPLIM
LIMIT
SLIN1
STBY
BRAKE
CONTROL
CTL2
CTL2
CTL1
CTL1
Vcc
VC
5/12V
LDVM
VC
80kΩ
80kΩ
LRPM
LRPM
LDO-
40kΩ
74kΩ
T.S.D.
74kΩ
LDO+
80kΩ
160kΩ
26.5kΩ
160kΩ
26.5kΩ
AGND
TLO-
160kΩ
TLO+
5V
80kΩ
DVcc
26.5kΩ
160kΩ
26.5kΩ
PRT
RST
PRTFLG
PRT
FLG
PROTECT
26.5kΩ
160kΩ
PRTRST
100k
TKO-
LDIN
160kΩ
160kΩ
TKO+
5V
LDIN
26.5kΩ
26.5kΩ
TLIN
160kΩ
26.5kΩ
160kΩ
26.5kΩ
TKIN
FCO-
160kΩ
160kΩ
FCO+
5V
160kΩ
TLIN
TKIN
26.5kΩ
26.5kΩ
FCIN
26.5kΩ
AVM
REV. A
FCIN
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.
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Appendix1-Rev2.0
