TDA8140 Datasheet, PDF (5/10 Pages) STMicroelectronics – HORIZONTAL DEFLECTION POWER DRIVER

Figure 3 : P.C. Board and Components Layout of the Figure 2 (1 : 1 scale)
STANDBY
TDA8140
R_f
D1
C_s
R_s
C_o
L_o
OUT
BU
R_b
R_o
C_b
C_a
+12V
COMPONENTS LIST FOR TYPICAL APPLICATION
CRT
Ca
Ro
Co
Lo
22"/26" 100°
47 µF
27 Ω 2W
220 µF
10 µH
14"/20" 90°
47 µF
27 Ω 1 W
220 µF
10 µH
CRT
Rb
Cb
Rs
Cs
22"/26" 100°
4.7 Ω
47 nF
0.15 Ω
1 nF
14"/20" 90°
4.7 Ω
47 nF
0.1 Ω
1 nF
APPLICATION INFORMATION
The conventional deflection system is shown in Figure 4. The driving circuit consists of a bipolar power
transistor driven by a transformer and a medium power element plus some passive components.
Figure 4 : Conventional Horizontal Deflection System for TVs
V_CC +
DRIVING CIRCUIT
I_B
I_C I_D
HORIZONTAL
TRANSFORMER
YOKE
DEFLECTION CIRCUIT
V _IN
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