TDA4851 查看數據表（PDF） - Philips Electronics

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TDA4851

Horizontal and vertical deflection controller for VGA/XGA and autosync monitors

Philips Electronics 

Philips Semiconductors

Horizontal and vertical deflection controller

for VGA/XGA and autosync monitors

Preliminary specification

TDA4851

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Horizontal output (open-collector)

Fig.6

V3

output voltage LOW

tp/tH

tH duty factor

VP

threshold to activate under voltage

protection

∆tH

jitter of horizontal output

E/W output

I3 = 20 mA

I3 = 60 mA

−

−

−

−

42

45

horizontal output off −

5.6

horizontal output on −

5.8

f = 31 kHz

−

−

f = 64 kHz

−

−

f = 100 kHz

−

−

note 2

0.3 V

0.8 V

48

%

−

V

−

V

3.5 ns

1.9 ns

1.2 ns

V11

bottom output signal during mid-scan

(pin 11)

top output signal during flyback

temperature coefficient 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

−

−110

−

5.0

−120

0

−

V

−135 µA

−

µA

Notes to the characteristics

1. ∆Io/∆t 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

10

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