TDA9112A datasheet(12/60 Pages) STMICROELECTRONICS

12 / 60 page

TDA9112A

12/60

Notes about horizontal section (continued)

Note 8: The tph(max) parameter is fixed by the application. For correct operation of asymmetry corrections through

dynamic phase modulation, this maximum must be reduced by maximum of the total dynamic phase required in

the direction leading to bending of corners to the right. Marginal situation is indicated by reach of VBotHPLL2C

low clamping level by waveform on pin HPLL2C. Also refer to Note 5 and Figure 6.

Note 9: All other dynamic phase corrections of picture asymmetry set to their neutral (medium) positions.

6.5 Vertical section

Table 2. Vertical section (Vcc = 12V, Tamb = 25°C)

Symbol

Parameter

Test Conditions

Value

Units

Min.

Typ.

Max.

AGC-controlled vertical oscillator sawtooth; VRefO = 8V

RL(VAGCCap)

Ext. load resistance on

VAGCCap pin(10)

∆V

amp/Vamp(R=∞) ≤1%

Ω

VVOB

Sawtooth bottom voltage on

VCap pin(11)

No load on VOscF pin(11)

VVOTref

Sawtooth top voltage internal ref-

erence

VVOT

Sawtooth top voltage on VCap

AGC loop stabilized

tVODis

Sawtooth Discharge time

CVCap=150nF

µs

fVO(0)

Free-running frequency

CVCap=150nF

100

fVOCapt

AGC loop capture frequency

CVCap=150nF

185

Sawtooth non-linearity(12)(17)

AGC loop stabilized (12)

0.5

Frequency drift of sawtooth

amplitude(18)(19)

AGC loop stabilized

fVOCapt(min)

≤f

VO≤fVO-

Capt(max)

200

ppm/Hz

Vertical output drive signal (on pin VOut); VRefO = 8V

Vmidref

Internal reference for vertical

sawtooth middle point

3.5

Vmid(VOut)

Middle point on VOut sawtooth

VPOS (Sad08h):(22)

x0000000b

x1000000b

x1111111b

VPOF (Sad1Eh):(21)

x0000000b

x1000000b

x1111111b

3.65

3.1

3.45

3.8

3.3

3.45

3.6

3.3

Vamp

Amplitude of VOut sawtooth

(peak-to-peak voltage)

VSIZE (Sad07h):(23)

x0000000b

x1000000b

x1111111b

VSAG (Sad1Dh):(20)

x0000000b

x1000000b

x1111111b

3.5

2.25

3.0

3.75

2.5

3.0

2.5

VoffVOut

Level on VOut pin at V-drive "off" I²C-bus bit VOutEn at 0

4.0

VOdev

∆

VOamp

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

VOamp

∆

VOamp

∆

⋅

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

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