TDA4851 Datasheet, PDF(10/17 Page) NXP Semiconductors – Horizontal and vertical deflection controller for VGA/XGA and autosync monitors

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TDA4851 Datasheet, PDF (10/17 Pages) NXP Semiconductors – Horizontal and vertical deflection controller for VGA/XGA and autosync monitors

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Philips Semiconductors

Horizontal and vertical deï¬ection controller

for VGA/XGA and autosync monitors

Preliminary speciï¬cation

TDA4851

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Horizontal output (open-collector)

Fig.6

output voltage LOW

tp/tH

tH duty factor

threshold to activate under voltage

protection

âtH

jitter of horizontal output

E/W output

I3 = 20 mA

I3 = 60 mA

horizontal output off â

5.6

horizontal output on â

5.8

f = 31 kHz

f = 64 kHz

f = 100 kHz

note 2

0.3 V

0.8 V

3.5 ns

1.9 ns

1.2 ns

V11

bottom output signal during mid-scan

(pin 11)

top output signal during ï¬yback

temperature coefï¬cient of output signal

E/W amplitude adjustment (parabola)

internally stabilized

Fig.7

1.05 1.2

4.2 4.5

1.35 V

4.8 V

250 10-6/K

V14

input voltage (pin 14)

I14

adjustment current

100% parabola

typically 28% parabola

â110

5.0

â120

â135 ÂµA

ÂµA

Notes to the characteristics

1. âIo/ât relative to value of Mode 3.

2. Parabola amplitude tracks with mode-dependent vertical amplitude but not with vertical amplitude adjustment.

Tracking can be achieved by a resistor from vertical amplitude potentiometer to pin 14.

November 1992

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