Philips TDA4861 Manuel D’Utilisation

1997 Jan 20

8

Philips Semiconductors

Product specification

Vertical deflection power amplifier for
monitors

TDA4861

Fig.4  GUARD circuit application on vertical output.

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MEH362

8

VP3

VP

5

2.2 

Ω

3.3 k

Ω

220 k

Ω

>

1 k

Ω

22 

µ

F

BC548

GUARD output
HIGH = error

2N5819

BAX13

vertical

output

signal

Fig.5  Application for flyback voltage generation by doubling the supply voltage.

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MEH359

yoke

470

µ

F

0.1 

µ

F

5.25 mH

C2  100 

µ

F

470 

µ

F

1 M

Ω

150 k

Ω

270 

Ω

10 k

Ω

1.8 k

Ω

BAX13

−

7.8 V

R1

1 

Ω

1.8 k

Ω

5.6 

Ω

R2  240 

Ω

VP2

VP3

8

7

6

5

4

3

2

1

9

PCO

RPCO

VN

VP1

V-OUT

SUB

FLB

DIFFERENTIAL

INPUT

AMPLIFIER

VOLTAGE

STABILIZER

VERTICAL

DRIVER

from TDA4850

V-shift

+

9 V

VERTICAL

OUTPUT

THERMAL AND

SOAR

PROTECTION

FLYBACK

GENERATOR

FLYBACK

DRIVER

PULSE

CIRCUIT