LB1978 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1978

Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos

SANYO -> Panasonic 

Pin Description

Pin number Pin name

1

FC

2

OSC

3

COM

4

IRF

5

CI

LB1978V

Equivalent circuit

Vcc

1

PGND

Vcc

2

SGND

Vcc

PGND

Vcc

3

10kΩ

120µA

4

SGND

Vcc

25µA

5

SGND

Pin function

Oscillator and ripple suppression pin.

The higher the capacitance connected to

FG, the more effectively will ripple

components be suppressed.

Startup pulse cycle and drive switching

cycle setting pin.

Increased capacitance will result in higher

startup pulse cycle and drive switching

cycle.

Startup waveform detector offset setting

pin.

RCOM = 1 kΩ results in approx. 25 mV

offset at startup

Oscillator circuit and F-V servo circuit

internal current setting pin.

Speed adjustment pin using CR

oscillation based on FG pulse edge

detection.

Continued on next page

No. 6186-5/9

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