PCF8534 Просмотр технического описания (PDF) - Philips Electronics

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производитель

PCF8534

Universal LCD driver for low multiplex rat

Philips Electronics 

NXP Semiconductors

PCF8534

Universal LCD driver for low multiplex rates

BP0

BP1

Sn

Sn+1

state 1

state 2

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

VSS

VLCD

2VLCD/3

VLCD/3

0V

−VLCD/3

−2VLCD/3

−VLCD

VLCD

2VLCD/3

VLCD/3

0V

−VLCD/3

−2VLCD/3

−VLCD

Tframe

LCD segments

state 1

state 2

(a) Waveforms at driver.

(b) Resultant waveforms

at LCD segment.

mgl747

Fig 6.

Vstate1(t) = Vsn(t) − VBP0(t).

VON(rms) = 0.745 VLCD.

Vstate2(t) = V(sn)(t) − VBP1(t).

VOFF(rms) = 0.333 VLCD.

Waveforms for the 1:2 multiplex drive mode with 1⁄3 bias.

PCF8534_0

Preliminary datasheet

Rev. 00.05 — 20 February 2007

© NXP B.V. 2007. All rights reserved.

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