STV6889 datasheet(10/56 Pages) STMICROELECTRONICS

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STV6889

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6.4 Horizontal section

Table 1. Horizontal section

( Vcc = 12V, Tamb = 25°C)

Symbol

Parameter

Test Conditions

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=5.23kW, 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

DfHO/DVHO

Average horizontal oscillator sensitivity

fHO(0) = 28.5kHz

20.2

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 (Sad01h):

11111111b

10000000b

00000000b

2.8

3.4

4.0

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

V(HFly) >VThrHFly

(2)

300

500

700

IInHFly

Current into HFly input

At top of H flyback pulse

VThrHFly

Voltage threshold on HFly input

0.5

0.6

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)

4.0

tph(min)

Min. advance of H-drive OFF before

middle of H flyback(7)

Null asym. correction

tph(max)

Max. advance of H-drive OFF before

middle of H flyback(8)

Null asym. correction

H-drive output on pin HOut

IHOut

Current into HOut output

Output driven LOW

tHoff

Duty cycle of H-drive signal

fH = 31kHz;

HDUTY (Sad00h):

x1111111b

x0000000b

Soft-start/Soft-stop value

fHO 0

()

fHO 0

()

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

/TH

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