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LB1978 Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part # LB1978
Description  Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos
PDF  9 Pages
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB1978 Datasheet(HTML) 5 Page - Sanyo Semicon Device

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LB1978V
No. 6186-5/9
Pin number
1
2
3
4
5
Pin Description
Pin name
FC
OSC
COM
IRF
CI
Equivalent circuit
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
Vcc
PGND
1
Vcc
SGND
2
Vcc
PGND
3
10k
Ω
120
µA
Vcc
SGND
4
25
µA
Vcc
SGND
5



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