bd6761fs ROHM Co. Ltd., bd6761fs Datasheet - Page 9

• 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.

⑪
⑧
③
⑯
⑦
⑤
⑥
⑩
⑥
PWM frequency external
constant
See P. 20/24.
3)BD6762FV
Capacitor for the protection
between the output FET
drain and source
See P. 20/24.
For setting Hall input level
See P. 20/24.
For setting Hall input level
See P. 20/24.
RF voltage smoothing low
pass filter
See P. 20/24.
Resistor for setting the
current limit
See P. 20/24.
Output FET gate voltage
stabilization resistor
See P. 21/24.
Capacitor for preventing
VREG oscillation
See P. 20/24.
Capacitor for Hall noise
elimination
See P. 20/24.
BD6762FV pin function
No.
10
12
13
14
15
16
17
18
19
20
11
1
2
3
4
5
6
7
8
9
①
Pin name
MOS FET
VREG
WHG
UHG
VHG
WLG
HW+
ULG
VLG
CFE
RFE
HU+
GND
HV+
HW-
HU-
HV-
RF
W
U
V
GND pin
Motor current detection pin
U-phase high-side FET gate pin
Protection pin for U-phase high-side FET GS breakdown voltage
U-phase low-side FET gate pin
V-phase high-side FET gate pin
Protection pin for V-phase high-side FET GS breakdown voltage
V-phase low-side FET gate pin
W-phase high-side FET gate pin
Protection pin for W-phase high side FET GS breakdown voltage
W-phase low-side FET gate pin
Internal power supply 5 V output pin
PWM frequency control pin
CEF charge/discharge current control 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
0.1μF
0.1μF
M
0.1μF
0.1Ω
RNF
MOS
MOS
MOS
R1
R2
VCO
VCO
VCO
FET
FET
FET
1000pF (500pF～2000pF)
20k (20kΩ～100kΩ)
HW
HU
HV
0.01μF
0.01μF
0.01μF
1kΩ
470pF
(0.01μF~0.1μF)
0.1μF
VCC
5k (2kΩ～10kΩ)
2k (1kΩ～5kΩ)
Function
VREG
WHG
GND
UHG
VHG
WLG
HW+
ULG
VLG
CFE
RFE
HU+
HV+
HW-
HU-
HV-
RF
W
U
V
GENERATOR
TRAIANGLE
REGURATOR
WAVE
Fig.14 BD6762FV Block Diagram
9/24
GENERATOR
CLK
No.
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
21
22
DAC3
VCO
SPEED DISCRIMINTOR
Pin name
FGSOUT
DIVIDER
INTOUT
FGOUT
120/SL
ST/SP
DOUT
POUT
FGIN+
CLKIN
INTIN
FGIN-
BOOSTER
VCC
LPF
CP2
CP1
SB
VG
FR
LP
LD
PHASE COMP
PLL
LD
LP
Start/Stop pin
Forward/reverse rotation switching pin
Short brake pin
120°/slope switching pin
FG amplifier input + pin
FG amplifier input - pin
FG amplifier output pin
FGS output pin
Reference CLK input pin
VCO system loop filter connection pin
PLL output pin
Speed discriminator output pin
Integration amplifier input pin
Integration amplifier output pin
Motor lock protection time setting pin
Motor rotation number lock detection pin
VCC pin
Step-up voltage output pin
Capacitor connection pin (to CP1)
Capacitor connection pin (to CP2)
FGSOUT
FGOUT
DOUT
POUT
FGIN+
120/SL
ST/SP
INTOUT
INTIN
CLKIN
FGIN-
CP1
VCC
LPF
CP2
0.1μF
R6 220kΩ
SB
FR
VG
LD
LP
R4
20kΩ
390kΩ
1kΩ～100kΩ
C9 0.33μF
1kΩ～100kΩ
R2
C7 0.22μF (0.1μF～1μF)
10kΩ
10kΩ
C8 0.33μF
0.01μF (0.01μF～0.1μF)
4.7kΩ 0.1μF
10μF
R1
150pF
C2
C6 0.47μF
R5
1MΩ
C5 0.047μF
R7 2kΩ
C1
Function
1μF
⑫
④
Capacitor for setting VG
current capacity
See P. 20/24.
⑭
Resistor for setting FG
amplifier gain and the
capacitor for the filter
See P. 20/24.
FGSOUT pull-up resistor
Capacitor for VCC pin
noise elimination
See P. 21/24.
⑲
Integration amplifier
external constant
See P. 21/24.
LPF external constant
See P. 21/24.
⑱
⑳
Capacitor for the
motor lock detection
time
See P. 21/24.
Speed lock
detection pull-up
resistor
⑫