TDA9109N View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA9109N' PDF : 32 Pages View PDF
TDA9109/N
OPERATING DESCRIPTION (continued)
For the E/W part and the dynamic horizontal phase
control part, a sawtooth-shapeddifferential current
in the following form is generated :
DI’ = k’ ⋅ (VOUT - VDCMID)
Then ∆I and ∆I’ are added and converted into
voltage for the E/W part.
Each of the two E/W components or the two dy-
namic horizontal phase control ones may be inhib-
ited by their own I2C select bit.
The E/W parabola is available on Pin 24 via an
Figure 17 : Geometric Corrections Principle
emitter follower output stage which has to be bi-
ased by an external resistor (10kΩ to ground).
Since stable in temperature, the device can be DC
coupled with an external circuitry.
The vertical dynamic focus is combined with the
horizontal focus on Pin 10.
The dynamic horizontal phase control drives inter-
nally the H-position, moving the HFLY position on
the horizontal sawtooth in the range of ± 1.4% TH
both for side pin balance and parallelogram.
VDCMID (3.5V)
23
Vertical Ramp VOUT
2
Parabola
Generator
V.Focus
Amp
HORIZONTAL
DYNAMIC FOCUS
VDCMID
(3.5V)
EW Amp
Keystone
10
Dynamic Focus
24
EW Output
Sidepin Amp
VDCMID
(3.5V)
Parallelogram
III.6 - E/W
EWOUT = 2.5V + K1 (VOUT - VDCMID) + K2 (VOUT - VDCMID)2
K1 is adjustable by the keystone I2C register
K2 is adjustable by the E/W amplitude I2C register
III.7 - Dynamic Horizontal Phase Control
IOUT = K3 (VOUT - VDCMID) + K4 (VOUT - VDCMID)2
K3 is adjustable by the parallelogram I2C register
K4 is adjustable by the side pin balance I2C register
To Horizontal
Phase
Sidepin Balance
Output Current
23/32
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