STV2001 datasheet(30/46 Pages) STMICROELECTRONICS

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STV2001

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Due to the large output stage voltage range (E/W

Pin Cushion, Keystone), the combination of the

tracking function, maximum vertical amplitude,

maximum or minimum vertical position and maxi-

mum gain on the DAC control may lead to output

stage saturation. This must be avoided by limiting

the output voltage with appropriate I2C register

values. For the E/W part and the dynamic horizon-

tal phase control part, a sawtooth-shaped differen-

tial current in the following form is generated:

∆I’ = k’ . (V

OUT - VDCMID).

Then

∆I and ∆I’ are added and converted into volt-

age for the E/W part.

Each of the two E/W components or the two dy-

namic horizontal phase control components may

be inhibited by their own I2C select bit.

EW output voltage is available at EWout pin direct-

ly. External buffer circuit is required to drive Dar-

lington pair transistor, which is sinking the DIODE

MODULATOR current in order to achieve EW cor-

rection. Additionally, an I2C controlled DC shift is

used for H-width.

The dynamic horizontal phase control drives the

H-position internally, moving the HFLY position on

the horizontal sawtooth in the range of

± 2.8 %T

both for side pin balance and parallelogram.

STV2001 数据表(PDF) 30 Page - STMicroelectronics