TDA4856 datasheet(44/56 Pages) PHILIPS

44 / 56 page

1999 Jul 13

Philips Semiconductors

Product speciﬁcation

I2C-bus autosync deﬂection controller for

PC monitors

TDA4856

Fig.26 Activation of soft-down sequence via pin XRAY.

handbook, full pagewidth

MGS281

floating

X-ray latch triggered

VXRAY

VHUNLOCK

BDRV duty cycle

HDRV duty cycle

Vertical linearity error

Horizontal focus pre-correction

Fig.27 Definition of vertical linearity error.

(1) IVOUT =IVOUT1 − IVOUT2.

(2) I1 =IVOUT at VVCAP = 1.9 V.

(3) I2 =IVOUT at VVCAP = 2.6 V.

(4) I3 =IVOUT at VVCAP = 3.3 V.

Which means:

Vertical linearity error =

–

--------------

max

–

-------------- or

–

--------------





–

handbook, halfpage

(2)

(3)

(4)

IVOUT

(1)

(

µA)

+415

−415

VVCAP

MBG551

Fig.28 Definition of horizontal focus pre-correction.

handbook, halfpage

MGS282

(1)

(2)

tprecor = 450 ns

tprecor = 300 ns

(1) Line flyback pulse at HFLB (pin 1).

(2) Horizontal focus parabola at FOCUS (pin 32).

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