TDA4841PS datasheet(15/60 Pages) PHILIPS

15 / 60 page

1999 Oct 25

Philips Semiconductors

Product speciﬁcation

I2C-bus autosync deﬂection controller for

PC monitors

TDA4841PS

CHARACTERISTICS

VCC = 12 V; Tamb =25 °C; peripheral components in accordance with Fig.1; unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Horizontal sync separator

INPUT CHARACTERISTICS FOR DC-COUPLED TTL SIGNALS: PIN HSYNC

Vi(HSYNC)

sync input signal voltage

1.7

−−

VHSYNC(sl)

slicing voltage level

1.2

1.4

1.6

tr(HSYNC)

rise time of sync pulse

−

500

tf(HSYNC)

fall time of sync pulse

−

500

tW(HSYNC)(min)

minimum width of sync pulse

0.7

−−µs

Ii(HSYNC)

input current

Vi(HSYNC) = 0.8 V

−−−200

µA

Vi(HSYNC) = 5.5 V

−−

µA

INPUT CHARACTERISTICS FOR AC-COUPLED VIDEO SIGNALS (SYNC-ON-VIDEO, NEGATIVE SYNC POLARITY)

VHSYNC

sync amplitude of video input

signal voltage

Rsource =50 Ω−

300

−

VHSYNC(AC,sl)

slicing voltage level

(measured from top sync)

Rsource =50 Ω

120

150

Vclamp(HSYNC)

top sync clamping voltage level

Rsource =50 Ω

1.1

1.28

1.5

Ich(HSYNC)

charge current for coupling

capacitor

Vi(HSYNC) >Vclamp(HSYNC)

1.7

2.4

3.4

µA

tW(HSYNC)(min)

minimum width of sync pulse

0.7

−−µs

Rsource(max)

maximum source resistance

duty cycle = 7%

−−

1500

Ω

Ri(diff)(HSYNC)

differential input resistance

during sync

−

−Ω

Automatic polarity correction for horizontal sync

horizontal sync pulse width

related to tH

−−

td(HPOL)

delay time for changing polarity

0.3

−

1.8

Vertical sync integrator

tint(V)

integration time for generation

of a vertical trigger pulse

fH = 15.625 kHz;

IHREF = 0.52 mA

µs

fH = 31.45 kHz;

IHREF = 1.052 mA

710

µs

fH = 64 kHz;

IHREF = 2.141 mA

3.9

5.7

6.5

µs

fH = 100 kHz;

IHREF = 3.345 mA

2.5

3.8

4.5

µs

Vertical sync slicer (DC-coupled, TTL compatible): pin VSYNC

Vi(VSYNC)

sync input signal voltage

1.7

−−

VVSYNC(sl)

slicing voltage level

1.2

1.4

1.6

Ii(VSYNC)

input current

0V<Vi(VSYNC) < 5.5 V

−−±10

µA

P(H)

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