TDA9115 datasheet(9/45 Pages) STMICROELECTRONICS

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TDA9115

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6.4 HORIZONTAL SECTION

Vcc = 12V, Tamb =25°C

Symbol

Parameter

Test Condit ions

Value

Units

Min.

Typ.

Max.

PLL1

IRO

Current load on RO pin

1.5

CCO

Capacitance on CO pin

390

fHO

Frequency of hor. oscillator

150

kHz

fHO(0)

Free-running frequency of hor. oscill. (1)

RRO=5.23kΩ,CCO=820pF

28.5

29.9

kHz

fHOCapt

Hor. PLL1 capture frequency (4)

fHO(0) = 28.5kHz

122

kHz

Temperature drift of free-running freq. (3)

-150

ppm/

°C

∆f

HO/∆VHO

Average horizontal oscillator sensitivity

fHO(0) = 28.5kHz

19.6

kHz/V

VHO

H. oscill. control voltage on pin HPLL1F VRefO=8V

1.4

6.0

VHOThrfr

Threshold on H. oscill. control voltage on

HPLL1F pin for tracking of EW with freq.

VRefO=8V

5.0

VHPosF

Control voltage on HPosF pin

HPOS (Sad01):

11111111b

10000000b

00000000b

2.60

3.30

3.85

2.8

3.4

4.0

3.05

3.55

4.15

VHOThrLo

Bottom of hor. oscillator sawtooth(6)

1.6

VHOThrHi

Top of hor. oscillator sawtooth(6)

6.4

PLL2

RIn(HFly)

Input impedance on HFly input (2)

V(HFly) >VThrHFly

300

500

700

Ω

IInHFly

Current into HFly input

At top of H flyback pulse

VThrHFly

Voltage threshold on HFly input

0.6

0.7

VS(0)

H flyback lock middle point(6)

No PLL2 phase modula-

tion

4.0

VBotHPLL2C

Low clamping voltage on HPLL2C pin(5)

1.6

VTopHPLL2C

High clamping voltage on HPLL2C pin(5)

3.75

4.0

4.25

tph(min)/TH

Min. advance of H-drive OFF before

middle of H flyback(7)

Null asym. correction

tph(max)/TH

Max. advance of H-drive OFF before

middle of H flyback(8)

Null asym. correction

H-drive outpu t on pin HOut

IHOut

Current into HOut output

Output driven LOW

tHoff/TH

Duty cycle of H-drive signal

Soft-start/S oft-stop value

Picture geometry corrections through PLL1 & PLL2

tHph/TH

H-flyback (center) static phase vs. sync

signal (via PLL1), see Figure 7

HPOS (Sad01):

11111111b

00000000b

+11

-11

HO 0

()

∆

HO 0

()

∆

⋅

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

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