bd6761fs ROHM Co. Ltd., bd6761fs Datasheet - Page 7

• 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.

●Block diagram, Application circuit diagram, and Pin function
⑨
1)BA6680FS
⑫
BA6680FS pin function
Resistor for setting FG
amplifier gain and the
capacitor for the filter
See P. 20/24.
Capacitor for setting VG current capacity
See P. 20/24.
Capacitor for setting
OSC frequency
See P. 20/24
No.
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
2.2μF
C1
Pin name
⑮
VREG
WHG
0.47μF
UHG
VHG
WLG
OSC
ULG
VLG
VCC
HU+
GND
CP2
CP1
1500pF
HU-
Capacitor, resistor
for setting the
charge pump
See P. 21/24
VG
CL
(50pF～200pF)
④
820Ω
R1
100pF
C2
82kΩ
COSC
R2
GND pin
Limit 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
VCC pin
Oscillator pin
Boost pin
CP2 pin
CP1 pin
VREG pin
Hall signal input pin
Hall signal input pin
CP1
OSC
FGsout
FGout
FGin-
FGin+
OSC
(0.01μF～0.1μF)
ACC
0.01μF
13.5kΩ
DEC
⑤
CP2
Charge
External constant for
setting PWM frequency
See P. 20/24.
Pump
RCP
0.1μF
100kΩ
Function
VG
Resistor for setting Hall input level
See P. 20/24.
CPo ｄ
C4
R3
(200Ω～1kΩ)
0.1μF
⑥
R2
0.01μF
Rref
TSD
200Ω
PWM
C3
Fig. 12 BD6680FS Block Diagram
Rfe
100ｋΩ)
50kΩ
(50kΩ
H
H
H
W-
～
W
W+
⑪ ⑬
Hall AMP
Cfe
100p
(50pF～100pF)
Capacitor for setting the
phase compensation of
low pass filter for CL
voltage smoothing
Capacitor
See P. 20/24 and 21/24.
H
H
H
V-
V
V+
1000pF
7/24
CNF
No.
21
22
23
24
26
28
31
32
17
18
19
20
25
27
29
30
H
H
H
U-
U
U+
Pin name
CL
470pF
FGsout
FGout
CPout
FGin+
HW+
FGin-
ACC
RCP
CNF
HV+
HW-
DEC
Pref
HV-
Rfe
Cfe
1kΩ
⑩
VCC
Capacitor for Hall input noise elimination
See P. 20/24.
Hall signal input pin
Hall signal input pin
Hall signal input pin
Hall signal input pin
FG input + pin
FG input - pin
FG output pin
FGs output pin
Deceleration signal input pin
Acceleration signal input pin
CPout current control pin
Charge pump output pin
PWM control signal input pin
Cfe current control pin
PWM frequency control pin
Phase compensation pin
Regurater
6V/10.5V
0.12Ω
RNF
⑧
Resistor for
setting the current
limit
See P. 20/24
GND
VREG
WHG
UHG
WLG
VHG
ULG
VLG
0.1μF
(0.01μF
～0.1μF)
10μF
1kΩ
RDS035
RDS035
RDS035
(200Ω～1kΩ)
L03
L03
L03
200Ω
Function
R1
⑯
Output gate
voltage
stabilization
resistor
See P. 21/24
⑭
Capacitor for VCC pin noise
elimination
See P. 21/24
⑥ ⑦
③
0.1μF
0.1μF
0.1μF
Capacitor for the protection
between the output FET
drain and source
See P. 20/24.
M
Capacitor for setting
the Hall input level
and preventing VREG
oscillation
See P. 20/24.
①
RDS035L03