bd6761fs ROHM Co. Ltd., bd6761fs Datasheet - Page 8

• Manufacturer Part Number: bd6761fs
• Description: Motor Driver Ic Series For Printers Three-phase Brushless Motor Pre-driver For Paper Feed Us
• Manufacturer: ROHM Co. Ltd.

⑯
② ③
⑧
⑪
⑰
⑩
Capacitor, diode for the
protection between the
output FET drain and
source
See P. 20/24.
CL voltage smoothing
low pass filter
See P. 20/24.
2)BD6761FS
Output FET gate
voltage stabilization
resistor
See P. 21/24.
Resistor for setting
the current limit
See P. 20/24.
Capacitor for Hall
noise elimination
See P. 20/24.
Capacitor for setting
the peak hold
See P. 20/24.
BD6761FS pin function
No.
①
10
12
13
14
15
16
11
MOS FET
1
2
3
4
5
6
7
8
9
Pin name
WHG
WLG
UHG
VHG
HW+
ULG
VLG
HU+
HV+
HW-
GND
HU-
CP1
HV-
CL
PH
0.1μF
0.1μF
0.12Ω
0.1μF
RNF
M
GND pin
CP1 pin
U-phase high-side FET gate pin
U-phase low-side FET gate pin
V-phase high-side FET gate pin
V-phase low-side FET gate pin
W-phase high-side FET gate pin
W-phase low-side FET gate pin
Motor current detection pin
Peak hold pin
Hall signal input pin
Hall signal input pin
Hall signal input pin
Hall signal input pin
Hall signal input pin
Hall signal input pin
MOS
MOS
MOS
FET
FET
FET
1k
R2
HW
HU
HV
470pF
200Ω
(200Ω
～1kΩ)
0.033μF
(0.01μF～0.1μF)
0.01μF
0.01μF
0.01μF
WHG
GND
UHG
VHG
WLG
HW+
16pin
ULG
VLG
HU+
CP1
HV+
HW-
HU-
Function
1pin
HV-
PH
CL
PEAK
HOLD
BOOSTER
CURRENT
Fig.13 BD6761FS Block Diagram
LIMIT
VCL2
S
R
Q
Q
SENSE AMP
CURRENT
DETECT
EDGE
TSD
VCL1
8/24
REGURATOR
REGURATOR
DETECT
SLEW
No.
10.5V
RATE
10.5V
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
OUTPUTOFF
UVLO
COMP
TORQUE
AMP
FGSOUT
Pin name
GENERATOR
FGOUT
TRAIANGLE
CPOUT
FGIN+
FGIN-
VREG
CNF
RCP
VCC
WAVE
RFE
CFE
CP2
DEC
ACC
F/R
VG
CHARGE
SHORT
BRAKE
PUMP
CFE current control pin
PWM frequency control pin
Phase compensation pin
Forward/reverse rotation switching pin
Deceleration signal input pin
Acceleration signal input pin
CPOUT current control pin
Charge pump output /
Torque control signal input pin
VREG pin
FG input + pin
FG input - pin
FG output pin
FGS output pin
VCC pin
Boost pin
CP2 pin
FGSOUT
32pin
17pin
CP2
VG
VCC
FGOUT
FGIN-
FGIN+
VREG
CPOUT
RCP
ACC
DEC
F/R
CNF
CFE
RFE
82kΩ
(1kΩ～100kΩ)
R2
1000pF (500pF～2000pF)
(50kΩ～100kΩ)
10kΩ
C4
100kΩ
0.33μF
470pF
0.1μF
50kΩ
0.1μF
(0.01μF~0.1μF)
0.01μF
(0.01μF～0.1μF)
0.1μF
820Ω
0.022μ
1kΩ
10μF
470pF
1500pF
R1
C2
0.47μF
100kΩ
C3
C1
R3
0.22μF
Function
⑭
⑫
⑦
⑥
⑮
⑬
⑤
④
R1
200Ω(200Ω～1kΩ)
Resistor for setting FG
amplifier gain and the
capacitor for the filter
See P. 20/24.
Capacitor for preventing
VREG oscillation
See P. 20/24.
For setting Hall
input level
See P. 20/24.
Capacitor, resistor for
setting the charge pump
See P. 21/24.
Capacitor for setting the
phase compensation
See P. 21/24.
External
setting PWM frequency
See P. 20/24.
Capacitor for setting
VG current capacity
See P. 20/24.
Capacitor for VCC pin
noise elimination
See P. 20/24.
FGSOUT pull-up
resistor
See P. 22/24.
constant
for