BU9729K Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Lista de partido

BU9729K

Segment-type LCD driver

ROHM Semiconductor 

Standard ICs

BU9729K

(5) LCD driver power supply

The LCD driver power supply is generated by the BU9729K. V1 = 2 · VC / 3, V2 = VC / 3 is generated internally.

VDD

VLCD

VC

VSS

Fig. 6 Example of power supply connection

(6) LCD drive circuit

The LCD drive circuit is configured of 4 common drivers and 18 segment drivers. When oscillation begins, any effec-

tive common output automatically outputs a selective waveform, while the others output non-selective waveforms.

Segment output automatically outputs drive waveforms, based on the display data and common counter. The com-

mon and segment output waveforms are shown in the following examples.

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