BD6761FV Просмотр технического описания (PDF) - ROHM Semiconductor
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BD6761FV Datasheet PDF : 23 Pages
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BD6761FS,BD6762FV
Technical Note
2)BD6762FV
⑩
RF voltage smoothing low
pass filter
See P. 18/22.
0.1Ω
⑧
Resistor for setting the current
limit
0.1µF
See P. 18/22.
③
Capacitor for the protection
between the output FET drain
and source
See P. 18/22.
0.1µF
M
①
RNF
470pF
1kΩ
MOS
FET
VCO
MOS
FET
VCO
GND
RF
UHG
U
ULG
VHG
V
VLG
PRE
DRIVER
LOGIC
0.1µF
MOS FET
⑮
Output FET gate voltage
stabilization resistor
See P. 19/22.
⑦
Capacitor for preventing
VREG oscillation
See P. 18/22.
⑤
PWM frequency external
constant
See P. 18/22.
⑥
For setting Hall input level
See P. 18/22.
⑨
Capacitor for Hall noise
elimination
See P. 18/22.
⑥
For setting Hall input level
See P. 18/22.
MOS
FET
VCO
WHG
W
WLG
(0.01µF~0.1µF)
0.1µF
VREG
1000pF (500pF ~ 2000pF)
CFE
RFE
20k (20kΩ ~ 100kΩ)
REGURATOR
TRIANGULAR
OSCILLATOR
VCC
R1
5k (2kΩ ~ 10kΩ)
0.01µF
HU
HU+
HU-
HV+
0.01µF
HV
HV-
HALL
COMP
0.01µF
HW
HW+
HW-
R2
2k (1kΩ ~ 5kΩ)
CLK
OSCILLATOR
BOOSTER
LD
LP
DAC3
VELOCITY
DISCRIMINATOR
PLL
VCO
PHASE
COMPARISON
DIVIDER
④
Capacitor for setting VG
current capacity
See P. 18/22.
CP1
CP2
VG
0.1µF
0.01µF (0.01µF ~ 0.1µF)
⑬
10µF
Capacitor for ⑫VCC pin
noise elimination
See P. 19/22.
VCC
1kΩ ~ 100kΩ
LD
Speed lock
detection pull-up
10kΩ
resistor
C7 0.22µF (0.1µF ~ 1µF)
LP
⑰
INTOUT
R6 220kΩ
INTIN
C5 0.047µF
C6 0.47µF
Capacitor for the
motor lock detection
time
See P. 19/22.
R4
20kΩ
DOUT
R5
⑱
1MΩ
Integration amplifier
external constant
See P. 19/22.
POUT
C8 0.33µF
LPF
C9 0.33µF
CLKIN
R7 2kΩ
⑲
LPF external constant
See P. 19/22.
1kΩ ~ 100kΩ
FGSOUT
10kΩ
FGSOUT pull-up resistor
R2
FGOUT
390kΩ
C2
150pF
FGIN-
FGIN+
4.7kΩ 0.1µF
R1 C1
1µF
⑪
120/SL
Resistor for setting FG
SB
amplifier gain and the
capacitor for the filter
See P. 18/22.
FR
ST/SP
Fig.10 BD6762FV Block Diagram
BD6762FV pin Function
No. Pin name
Function
No. Pin name
Function
1 GND GND pin
21 ST/SP Start/Stop pin
2
RF Motor current detection pin
22
FR Forward/reverse rotation switching pin
3 UHG U-phase high-side FET gate pin
23
SB Short brake pin
4
U
Protection pin for U-phase high-side
FET GS breakdown voltage
24 120/SL 120°/slope switching pin
5 ULG U-phase low-side FET gate pin
25 FGIN+ FG amplifier input + pin
6 VHG V-phase high-side FET gate pin
26 FGIN- FG amplifier input - pin
7
V
Protection pin for V-phase high-side
FET GS breakdown voltage
27 FGOUT FG amplifier output pin
8 VLG V-phase low-side FET gate pin
28 FGSOUT FGS output pin
9 WHG W-phase high-side FET gate pin
29 CLKIN Reference CLK input pin
10
W
Protection pin for W-phase high side
FET GS breakdown voltage
30 LPF VCO system loop filter connection pin
11 WLG W-phase low-side FET gate pin
31 POUT PLL output pin
12 VREG Internal power supply 5 V output pin
32 DOUT Speed discriminator output pin
13 CFE PWM frequency control pin
33 INTIN Integration amplifier input pin
14 RFE CEF charge/discharge current control pin 34 INTOUT Integration amplifier output pin
15 HU+ Hall signal input pin
35
LP Motor lock protection time setting pin
16 HU- Hall signal input pin
36
LD Motor rotation number lock detection pin
17 HV+ Hall signal input pin
37 VCC VCC pin
18 HV- Hall signal input pin
38 VG Step-up voltage output pin
19 HW+ Hall signal input pin
39 CP2 Capacitor connection pin (to CP1)
20 HW- Hall signal input pin
40 CP1 Capacitor connection pin (to CP2)
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7/22
2010.06 - Rev.A
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