TDA8145 Datasheet, PDF (3/5 Pages) STMicroelectronics – TV EAST/WEST CORRECTION CIRCUIT FOR SQUARE TUBES

TDA8145
ELECTRICAL CHARACTERISTICS (Tamb = 25^oC, VS = 26V, Vfr = 0, S1 and S2 in "a" position, refer
to the test circuit unless otherwise specified) (continued)
Symbol
Parameter
K1
Parabola Coefficient
(see Figure 2)
K2
∆V7 (*)
I₈
V_SATL
V_SATH
V_F
I_fr
Parabola Coefficient
(see Figure 2)
Current Source
Saturation Voltage
Saturation Voltage
Forward Voltage
Frame Sawtooth Current
Test Conditions
K₁
=
V_7A
V_7A
−
−
V_7B
V_7C
K₂
=
V_7A
V_7A
−
−
V_7C
V_7D
∆V₇ = V_7E – V_7F
S1 → b
I_o = 400 mA Sink
I_o = 100 mA Source
I_o = 400 mA
V_fr = 6.6 V_pp
S2 → b
S2 → c
S2 → d
Min. Typ. Max. Unit
0.26
0.70
– 40
40 mV
100
µA
1
2
V
S1 → b 0.8 1.5 V
S1 → b 1.2 1.7 V
66
µA
Figure 1 : Test Circuit
V_S
R7
R6
10kΩ
10kΩ
V_F
I_FR
7
6
V_SATH
2
a
V_FR
R2
S2
b
1 _TDA8145 5
R1
c
d
3
10kΩ
R3
11kΩ
4
8
V_REF
I_F
-I_O
R8
20kΩ
I_O
V_SATL
Figure 2 : Parabola Characteristics
b
a
S1
V₇ (V)
V_7A
V_7B
V_7C
V_7D
V_7E
-60
36
0 15 30
V_7F
60 I_FR (µA)
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