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LB11870 データシート(PDF) 7 Page - ON Semiconductor

部品番号 LB11870
部品情報  Three-Phase Brushless Motor Driver
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メーカー  ONSEMI [ON Semiconductor]
ホームページ  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LB11870 データシート(HTML) 7 Page - ON Semiconductor

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LB11870
No.7256-7/14
Pin Functions
Pin No.
Symbol
Pin Description
Equivalent Circuit
3
1
46
OUT1
OUT2
OUT3
Motor drive output
44
GND3
Output block ground
37
38
VM1
VM2
Output block power supply and current
detection.
Insert the resistor Rf between this pin and
VCC1.
The output current will be limited to the current
value
IOUT = VRF/Rf.
39
VCC2
Upper diode cathode connection. Short this pin
to VCC1.
11
12
9
10
6
8
IN1+
IN1-
IN2+
IN2-
IN3+
IN3-
Hall element inputs.
The high state is when IN+ is greater than IN-,
and the low state is the reverse.
An amplitude of at least 100mVp-p (differential)
is desirable for the Hall element signal inputs. If
noise on the Hall signals is a problem, insert
capacitors between the IN+ and IN- inputs.
13
14
FGIN+
FGIN-
FG input.
If noise on the FG signal input is a problem,
connect a filter consisting of either a capacitor
or a capacitor and a resistor.
15
GND1
Control circuit block ground
16
GND2
SUBGND pin
17
PWM
Sets the PWM oscillator frequency.
Insert a capacitor between this pin and ground.
The PWM oscillator frequency is set to about
34kHz when a 680pF capacitor is used.
Continued on next page.
1
3
46
300
Ω
44
37
VCC1
38
39
VREG
300
Ω
8
300
Ω
11
9
6
12
10
VREG
300
Ω
14
300
Ω
13
VREG
200
Ω
17


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