1997 Oct 27 3

Philips Semiconductors Product specification
Vertical deflection power amplifier for
monitors TDA4860

BLOCK DIAGRAM

Fig.1 Block diagram and application circuit with flyback supply voltage VP3 from an external source.

Deflection frequency range from 50 Hz to 100 Hz.

Assumed values:
Iyoke = 1.42 A.
Ryoke = 4.17 Ω+7%+∆R(T) = 6.12 Ω.
Lyoke = 5.25 mH.
R1= 1.0 Ω±1%.
Tamb =65°C.
Tj(max) = 105 °C.
Tyoke =75°C.
Pyoke = 1.2 W.
PIC = 1.8 W.
Ptot = 3.0 W.
tp FLB = typically 250 µs.
Attention: the heatsink of the IC must be isolated against ground; the cooling fin is connected to pin 6.
handbook, full pagewidth
MHA591
yoke
470
µF0.1 µF
470 µF
470 µF
1 MΩ
150 kΩ270 Ω
4.3 Ω10 kΩ
1.8 kΩ
BAX13
−8.1 V +52 V
R1
1 Ω
1.8 kΩ
5.6 Ω
VP2 VP3
87654321 9
PCO
RPCO
VN
VP1 V-OUT SUB FLB
DIFFERENTIAL
INPUT
AMPLIFIER
VOLTAGE
STABILIZER VERTICAL
DRIVER
from TDA4850
V-shift
+8.8 V
VERTICAL
OUTPUT
TDA4860 THERMAL AND
SOAR
PROTECTION
FLYBACK
GENERATOR
FLYBACK
DRIVER
PULSE
CIRCUIT