1997 Jan 20 8

Philips Semiconductors Product specification
Vertical deflection power amplifier for
monitors TDA4861

APPLICATION INFORMATION

Fig.4 GUARD circuit application on vertical output.

handbook, full pagewidth
MEH362

TDA4861

8
VP3
VP
52.2 3.3 k
220 k
>1 k
22 µF
BC548
GUARD output
HIGH = error
2N5819
BAX13
vertical
output
signal

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

handbook, full pagewidth
MEH359
yoke
470
µF0.1 µF
5.25 mH
C2 100 µF
470 µF
1 M
150 k270 10 k
1.8 k
BAX13
7.8 V
R1
1
1.8 k
5.6
R2 240
VP2 VP3
87654321 9
PCO
RPCO
VN
VP1 V-OUT SUB FLB
DIFFERENTIAL
INPUT
AMPLIFIER
VOLTAGE
STABILIZER VERTICAL
DRIVER
from TDA4850
V-shift
+9 V
VERTICAL
OUTPUT
TDA4861 THERMAL AND
SOAR
PROTECTION
FLYBACK
GENERATOR
FLYBACK
DRIVER
PULSE
CIRCUIT