LB11870 Datasheet, PDF (10/14 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for Polygonal Mirror Motors

LB11870
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Pin No. Symbol
Pin Description
32
S/S
Start/stop control input.
Low: 0 to 1.5V
High: 3.5V to VREG
Hysteresis: 0.5V
Low: start.
This pin goes to the high level when open.
VREG
33
CLK
Clock input.
Low: 0 to 1.5V
High: 3.5V to VREG
Hysteresis: 0.5V
fCLK = 10kHz (maximum)
If noise is a problem, use a capacitor to remove
that noise at this input.
VREG
34
BRSEL Deceleration switching control input.
Low: 0 to 1.5V
High: 3.5V to VREG
This pin goes to the high level when open.
Low: reverse torque control, High: free running.
An external Schottky barrier diode is required
on the output low side if reverse torque control
is used.
VREG
35
PH
RF waveform smoothing.
If noise on the RF waveform is a problem,
VREG
insert a capacitor between this pin and ground.
Equivalent Circuit
2kΩ
32
2kΩ
33
2kΩ
34
500Ω
35
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No.7256-10/14