LB1978V Datasheet, PDF (6/9 Pages) Sanyo Semicon Device – Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos

Continued from preceding page
Pin number Pin name
6
PW
LB1978V
Equivalent circuit
Vcc
7
PV
8
IV
9
VI
10
BRI
PGND
Vcc
SGND
Vcc
SGND
Vcc
6
7
1kΩ
8
1kΩ
9
1kΩ
SGND
Vcc
10
Pin function
CI pin waveform and reference voltage
comparator output pin.
Current buffer input/output pin.
Current-to-voltage converter comparator
input pin.
Voltage-to-current converter input pin.
Speed increases when VI pin voltage is
higher than reference voltage and
decreases when VI pin voltage is lower
than reference voltage.
Brake bias pin.
When S/S pin is Low and BR1 pin is 0.9V
or higher, brake drive pin BR2 goes ON.
SGND
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