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LB11870 Datasheet, PDF (7/14 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for Polygonal Mirror Motors | |||
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LB11870
Pin Functions
Pin No.
3
1
46
Pin
OUT1
OUT2
OUT3
Motor drive output
Function
44
GND3 Output block ground
Output block power supply and current detection.
37
VM1 Insert the resistor Rf between this pin and VCC1.
38
VM2 The output current will be limited to the current value
IOUT = VRF/Rf.
VCC1
Equivalent circuit
39
300â¦
38
37
1 3 46
39
VCC2 Upper diode cathode connection. Short this pin to VCC1.
VREG
11
IN1+ Hall element inputs.
12
IN1â The high state is when IN+ is greater than IN-, and the
9
IN2+ low state is the reverse.
10
IN2â
An amplitude of at least 100 mVp-p (differential) is
300â¦
desirable for the Hall element signal inputs. If noise on 6 9 11
6
IN3+ the Hall signals is a problem, insert capacitors between
8
IN3â the IN+ and INâ inputs.
44
300â¦
8 10 12
FG input.
13
FGIN+ If noise on the FG signal input is a problem, connect a
14
FGINâ filter consisting of either a capacitor or a capacitor and a
resistor.
VREG
300â¦
13
300â¦
14
15
GND1 Control circuit block ground
16
GND2 SUBGND pin
Continued on next page.
No. 7256 -7/14
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