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TDA4850

Horizontal and vertical deflection controller for VGA/XGA and multi-frequency monitors

Philips Electronics 

Philips Semiconductors

Horizontal and vertical deflection controller

for VGA/XGA and multi-frequency monitors

Product specification

TDA4850

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX. UNIT

Vertical amplitude adjustment (in percent of output signal)

V13

I13

∆Io/∆t

input voltage

adjustment current

VGA mode-dependent pre-settings

activated by an external resistor on pin 7

Io max (100%)

Io min (typically 58%)

note 1; see Table 2

mode 1

mode 2

mode 3

mode 4

multi-frequency operation (VGA operation V7 < 50 mV

disabled)

−

5.0

−

V

−110 −120 −135 µA

−

0

−

µA

116.1 116.8 117.5 %

102.0 102.2 102.5 %

−

100 −

%

−

100 −

%

−

100 −

%

E/W output; note 2

V11

bottom output signal during mid-scan

(pin 11)

top output signal during flyback

TC

temperature coefficient of output signal

E/W amplitude adjustment (parabola); see Fig.4

V14

input voltage (pin 14)

I14

adjustment current

internally stabilized

1.05 1.2 1.35 V

4.1 4.35 4.6 V

−

−

250 10−6/K

−

5.0

−

V

100% parabola

−110 −120 −135 µA

typically 28% parabola −

0

−

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.

1997 Jun 05

11

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