BA6664FME2 View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
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BA6664FME2 Datasheet PDF : 18 Pages
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BA6859AFP-Y,BA6664FM,BD6671FM
Technical Note
3)BD6671FM
200Ω
H1
1000pF
H1+ Hall comp
EXOR
H1-
H2+
＋
＋
－
Hall Amp
PWM
+ Comp
-
H2
H2-
＋
1000pF
－
H3+
+
-
TSD
H3
H3-
1000pF
＋
－
200Ω
Vcc
GSW
FIN
Gain
control
+
-
OSC
Matrix
U-Pre
Driver
FG3
FG
Hall VH
bias
VM
※2
A1
RNF 0.5Ω
A2
FIN
Driver
GND
0.1 µ F
CP1
CP2
Charge
Pump
VG
0.1 µF
CNF
0.047µF
Vcc MODE
Vcc
10 µ F
Matrix
L -Pre
Driver
UVLO
＋
Curre nt Limit Comp －
＋
DQ
CK QB
－
Current
Sense AMP
CL
REVERSE
DETECT
PS
Torque
AMP ＋
－
RNF1
A3
RNF2 10kΩ
PS
0.01µ F
Vcc
EC
servo
ECR signal
VM
1.65V
100 µ F
※1
※ 1 Set capacitor between VM and GND, close as possible to the IC.
※2 To prevent from concentration of current routes, make the wiring
impedance values from the power supply equal as possible.
Fig.8 BD6671FM Block Diagram
BD6671FM Pin Function
Pin No Pin name
Function
1
H1+ Hall signal input pin
2
H1- Hall signal input pin
3
H2+ Hall signal input pin
4
H2- Hall signal input pin
5
H3+ Hall signal input pin
6
H3- Hall signal input pin
7
GSW Gain switching pin
8
GND GND
9
CP1
Charge pump capacity connection
pin 1
10
CP2
Charge pump capacity connection
pin 2
11
VG Charge pump output pin
12
CNF
Capacitor connection pin for phase
compensation
13
MODE Brake mode switching pin
14
VCC Power supply pin
*Heat radiation FIN: GND
Pin No Pin name
Function
15
VM Motor power supply pin
16
ECR Output voltage control reference pin
17
EC Output voltage control pin
18
PS Power-saving pin
19
RNF2
Resistance connection pin for output
current detection
20
A3 Output pin
21
RNF1
Resistance connection pin for output
current detection
22
A2 Output pin
23
RNF1
Resistance connection for output
current
24
A1 Output pin
25
VM Motor power supply pin
26
VH Hall bias pin
27
FG FG Output pin
28
FG3 FG3 Output pin
FIN
FIN GND
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7/17
2010.06 - Rev.A
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