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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 V
P3
from an external source.
Deflection frequency range from 50 Hz to 100 Hz.
Assumed values:
I
yoke
= 1.42 A.
R
yoke
= 4.17 Ω +7%+∆R(T) = 6.12 Ω.
L
yoke
= 5.25 mH.
R
1
= 1.0 Ω±1%.
T
amb
=65°C.
T
j(max)
= 105 °C.
T
yoke
=75°C.
P
yoke
= 1.2 W.
P
IC
= 1.8 W.
P
tot
= 3.0 W.
t
p 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
µF
0.1 µF
470 µF
470 µF
1 MΩ
150 kΩ
270 Ω
4.3 Ω
10 kΩ
1.8 kΩ
BAX13
−
8.1 V
+
52 V
R1
1 Ω
1.8 kΩ
5.6 Ω
V
P2
V
P3
87654321 9
PCO
R
PCO
V
N
V
P1
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