ML9042 datasheet(10/58 Pages) OKI

10 / 58 page

FEDL9042-01

OKI Semiconductor

ML9042-xx

10/58

Note 3:

Note 4:

The wire between OSCR3 and OSC2, or between OSCR5

and OSC2 should be as short as possible. Keep open

between OSC1 and OSCR3, or between OSC1 and OSCR5.

The wire between OSC1 and Rf and the wire between

OSC2 and Rf should be as short as possible.

Keep OSCR3 and OSCR5 open.

OSC1

OSCR3

OSC2

OSC1

OSCR5

OSC2

OSCR3

OSCR5

OSC1

OSCR5

OSC2

Rf = 85 kΩ±2%

OSCR3

Note 5:

tHW

tLW

VDD

fIN

waveform

VDD

Applied to the pulses entering from the OSC1 pin

fduty = tHW/(tHW + tLW) ×100 (%)

Note 6:

0.8VDD

Applied to the pulses entering from the OSC1 pin

0.8VDD

0.2VDD

trf

tff

Note 7:

The maximum value of the voltage multiplier input voltage should be set at 2.75 V, and the

minimum value of the voltage multiplier input voltage should be set by monitoring the voltage

of V0 in actual use so that the voltage multiplier output voltage meets the specification for the

bias voltage for driving LCD after contrast adjustment.

Note 8:

For 1/4 bias, V2 and V3B pins are short-circuited. V3A pin is open.

For 1/5 bias, V3A and V3B pins are short-circuited. V2 pin is open.

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