PCF8531 datasheet(34/44 Pages) NXP

34 / 44 page

PCF8531_4

Product data sheet

Rev. 04 — 13 June 2008

34 of 44

NXP Semiconductors

PCF8531

34 x 128 pixel matrix driver

VLCD = 7.5 V; VDD1 to VDD3 = 2.7 V; Tamb =27 °C;

no VLCD load.

VDD1 = 1.8 V; VDD2 and VDD3 = 2.5 V; external VLCD;

Tamb =27 °C; TC = 0; BS = 100; no VLCD load.

Fig 24. LCD supply voltage as a function of

temperature

Fig 25. Supply current as a function of LCD supply

voltage

−50

100

mgs479

TC0

TC1

TC6

VLCD

(V)

T (

°C)

TC7

246

mgs480

(

µA)

VLCD (V)

IDD

IDD(LCD)

VDD1 = 2.5 V; VDD2 and VDD3 = 2.5 V; external VLCD;

Tamb =27 °C; TC = 0; BS = 100; no VLCD load.

VDD1 = 1.8 V; VDD2 = 2.5 V; 2 × voltage multiplier;

Tamb =27 °C; TC = 0; BS = 111; no VLCD load.

Fig 26. Supply current as a function of frequency

Fig 27. Supply current as a function of LCD supply

voltage

020

mgs481

(

µA)

f (kHz)

IDD

IDD(LCD)

3.2

mgs482

3.4

3.6

3.8

IDD

(

µA)

VLCD (V)

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