1/3
Structure
Product series
Type
Function
特
長
Silicon Monolithic Integrated Circuit
PWM Driver for combi drive
BD7791FUV
・3-phase-sensor-less
system, therefore don’t need three hall sensors
for spindle motor driver.
・Stability
high-speed start from the state of the stop for spindle motor driver.
○Absolute
maximum ratings
Parameter
Power MOS supply voltage
Control circuit power supply voltage
Maximum driver output current
Power dissipation
Operating temperature range
Storage temperature range
Joint part temperature
Symbol
PVcc
Vcc
IoMAX
Pd
Topr
Tstg
Tjmax
3
Limits
6
6
＃1
1.37
＃2
-30½85
-55½150
150
Unit
V
V
A
W
℃
℃
℃
#1 The current is guaranteed 3.0A in case of the current is turned on/off in a duty-ratio of less than 1/10 with a maximum
on-time of 5ms and when short brake.
#2 PCB (70mm×70mm×1.6mm,occupied copper foil is less than 3%,glass epoxy standard board) mounting.
Reduce power by 11.0 mW for each degree above 25℃.
○Recommended
operating conditions(Ta=-30½+85℃)
〔Set
the power supply voltage taking allowable dissipation into considering〕
Parameter
Power MOS supply voltage
Control circuit power supply voltage
Symbol
PVcc
Vcc
MIN
4.0
4.0
TYP
5.0
5.0
MAX
5.5
5.5
Unit
V
V
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=PVcc=5V, Vref=1.25V, RL(ACT,STP,LOAD)=8Ω+47μH, RL(SP)=2Ω+47μH, RNF=0.2Ω,
CTL1,2=3.3V, GVSW=0V, VIN1,2,3,4,5,6=OPEN, VCOM=OPEN, VCCOM=OPEN, VCOUT=OPEN)
Parameter
Symbol
MIN.
TYP. MAX.
Unit
Condition
Quiescent current
ICC
－
8
20
mA
CTL1,2=H
Current in standby mode
IST
－
－
0.2
mA
CTL1,2=L
Input dead zone (one side)
VDZACT1,2,3
－
－
3
mV
Output offset voltage
VOO1,2,3
-50
－
50
mV
Voltage gain 1, 2
Voltage gain 1 (CH1,2,3)
GVC1_1,2,3
15.5
17.5
19.5
dB
External input resistor 10kΩ
Voltage gain 2 (CH1,2)
GVC2_1,2
10
12
14
dB
Extern al input resistor 10kΩ, GVSW=H
Output On resistor（top and bottom）
RON1,2,3
－
1.2
1.8
Ω
Io=500mA
PWM frequency
f1,2,3CH
215
310
405
kHz
Voltage gain 1, 2
Input dead zone (one side)
VDZ4,5
10
30
50
mV
Output offset voltage
VOO4,5
-50
－
50
mV
Voltage gain
GVC4,5
15.5
17.5
19.5
dB
Output On resistor（top and bottom）
RON4,5
－
1.6
2.4
Ω
Io=500mA
PWM frequency
f4,5CH
215
310
405
kHz
Input dead zone (one side)
VDZ6
20
60
100
mV
CTL1=H, CTL2=L
Output offset voltage
VOO6
-50
－
50
mV
CTL1=H, CTL2=L
Voltage gain
GVC6
15.5
17.5
19.5
dB
CTL1=H, CTL2=L
Output On resistor（top and bottom）
RON6
－
1.8
2.7
Ω
Io=500mA, CTL1=H, CTL2=L
PWM frequency
f6CH
215
310
405
kHz
CTL1=H, CTL2=L
Input dead zone of gm1(one side)
VDZSP1
2
30
100
mV
Input dead zone of gm2(one side)
VDZSP2
6
90
300
mV
GVSW=M
Input dead zone of gm3(one side)
VDZSP3
10
150
500
mV
GVSW=H
Input output gain 1
gm1
0.88
1.1
1.32
A/V
Input output gain 2
gm2
0.28
0.36
0.44
A/V
GVSW=M
Input output gain 3
gm3
0.17
0.22
0.27
A/V
GVSW=H
Output On resistor（top and bottom）
RONSP
－
0.6
1.4
Ω
Io=500mA
Output limit voltage
VLIMSP
0.18
0.22
0.26
V
PWM frequency
fSP
－
167
－
kHz
Vref drop mute ON threshold voltage
VMVref
－
0.7
1.0
V
Vcc drop mute ON threshold voltage
VMVccD
3.2
3.6
4.0
V
CTL1 L voltage
VCTL1L
0
－
1.0
V
CTL1 H voltage
VCTL1H
2.0
－
3.3
V
CTL2, GVSW L voltage
VCTL2L, VGVL
0
－
1.0
V
CTL2, GVSW M(Hi-z) voltage
VCTL2M, VGVM
1.6
－
2.0
V
OPEN（Hi-z）is also available.
CTL2, GVSW H voltage
VCTL2H, VGVH
2.6
－
3.3
V
L
gm1
M（Hi-z）
gm2
GVC1_1,2
H
gm3
GVC2_1,2
Circuit
current
Actuator
driver
block
Steppin
g driver
block
Loading
driver
block
Spindle
driver
block
Others
GVSW
Spindle gain mode
CH1,2 gain mode
CTL1
CTL2
Brake mode
SPINDLE Output
CH1,2,3 Output
CH4,5 Output
CH6 Output
L
―
Hi-Z
Hi-Z
Hi-Z
Hi-Z
L
M
ACTIVE
Hi-Z
Hi-Z
Hi-Z
Short brake
H
ACTIVE
ACTIVE
ACTIVE
Hi-Z
L
Hi-Z
Hi-Z
ACTIVE
ACTIVE
H
M（Hi-z）
Reverse brake
ACTIVE
Hi-Z
Hi-Z
Hi-Z
H
ACTIVE
ACTIVE
ACTIVE
Hi-Z
Please supply the middle level voltage for CTL2 when using it in the mode of CTL1=L and CTL2=M.
○Package
outlines
BD7791FUV
LOT No.
(UNIT : mm)
REV. A
3/3
○Block
diagram / Application circuit
The external constants concerning CH1,2 are values optimized in case 4Ω+47μH is assumed as a load, and those concerning CH3
are values optimized in case 4Ω+10μH is assumed as a load.
PVcc1
10kΩ
IN1
Logic
270Ω
0.1μ F
CNF1
NF amp
VO1F
Pre
driver
POWER
MOS
VO1R
5V
10kΩ
IN2
Logic
270Ω
VO2F
Pre
driver
POWER
MOS
VO2R
0.1μ F
CNF2
NF amp
10kΩ
IN3
Logic
150Ω
VO3F
Pre
driver
POWER
MOS
VO3R
0.047μ F
CNF3
NF amp
OSC
IN6
Logic
Pre
driver
POWER
MOS
VO6F
VO6R
PGND1
NF amp
PVcc3
VO4F
Logic
Pre
driver
POWER
MOS
M
VO4R
5V
IN4
0.033μ F
CNF4
NF amp
IN5
Logic
VO5F
Pre
driver
POWER
MOS
VO5R
PGND3
0.033μ F
CNF5
NF amp
OSC
5V
100kΩ
FG
OSC
INSP
BEMF
DETECTER
LIMIT
Logic
Pre
driver
POWER
MOS
COUT
CCOM
COM
PVcc21
PVcc22
U
V
W
5V
RNF1
RNF2
GVSW
CTL1
CTL2
TEST1
TEST2
TEST3
Vref
GND
STBY/BMSW
T.S.D.
Vcc
22μ F
5V
RNF=0.2Ω
GVSW
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.
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2007 ROHM CO.,LTD.
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