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
µ
s.
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
µ
F
0.1
µ
F
470
µ
F
470
µ
F
1 M
Ω
150 k
Ω
270
Ω
4.3
Ω
10 k
Ω
1.8 k
Ω
BAX13
−
8.1 V
+
52 V
R1
1
Ω
1.8 k
Ω
5.6
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
+
8.8 V
VERTICAL
OUTPUT
TDA4860
THERMAL AND
SOAR
PROTECTION
FLYBACK
GENERATOR
FLYBACK
DRIVER
PULSE
CIRCUIT
