TDA8145_04 Datasheet, PDF (3/9 Pages) STMicroelectronics – TV EAST/WEST CORRECTION CIRCUIT FOR SQUARE TUBES

TDA8145
Table 3. ELECTRICAL CHARACTERISTICS
(T_amb = 25°C, V_S = 26V, V_fr = 0, S1 and S2 in "a" position, refer to the test circuit unless otherwise
specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
V_S
Supply Voltage
17 24 30
V
I_S
Supply Current
4.5 7
mA
V_REF Internal Reference Voltage
7.6 8.0 8.8
V
–I_REF Internal Reference Current
V_ref/R3
0.73
mA
V_7(A) ^(*) Pin 7 Output Voltage
I_fr = 0 µA
15.3 16.0 16.7 V
V_7(B) ^(*) Pin 7 Output Voltage
I_fr = 30 µA
15
V
K₁
Parabola Coefficient (see Figure 5)
-V----7----A-----^–-----V----7----B--
K₁ = ^{V7A – V7C}
0.26
K₂
Parabola Coefficient (see Figure 5)
-V----7----A-----^–-----V----7----C--
K₂ = ^{V7A – V7D}
0.70
∆V₇ ^(*)
∆V₇ = V_7E – V_7F,
– 40
40 mV
I₈
Current Source
S1 → b
100
µA
V_SATL Saturation Voltage
I_o = 400 mA Sink S2 → b
1
2
V
V_SATH Saturation Voltage
I_o = 100 mA Source S2 → c S1 → b
0.8 1.5
V
V_F
Forward Voltage
I_o = 400 mA S2 → d S1 → b
1.2 1.7
V
I_FR
Frame Sawtooth Current
V_fr = 6.6 V_PP
66
µA
Figure 4. 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
3
c
d
10kΩ
R3
11kΩ
4
8
V_REF
I_F
-I_O
R8
20kΩ
b
a
S1
I_O
V_SATL
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