TDA8145 Datasheet, PDF (2/5 Pages) STMicroelectronics – TV EAST/WEST CORRECTION CIRCUIT FOR SQUARE TUBES

TDA8145
SCHEMATIC DIAGRAM
TDA8145
CURRENT LIMITER
7
8
COMPARATOR AND OUTPUT STAGE
V_S - 3 V_BE
Q1
Q13
Q4
Q2
R5
1
OP1
Q5
V_REF
Q13
Q14
Q15
Q16
R2
Q17 Q18
D1
R5
OP2
R6
Q12
R7
Q21
R4
R3
Q19
Q20
R8
2
I_IN
Q7
V_S - 6 V_BE
Q6
Q11
D2
Q10
D3
Q8
Q9
R9
Z1
R10 R11 R12 R13
OP3
I_REF
Q22
6 +VS
5 OUTPUT
4 GND
FULL-WAVE RECTIFIER
PARABOLA NETWORK
CURRENT REFERENCE
3
ABSOLUTE MAXIMUM RATINGS
Symbol
V_s
I_s
Ptot
T_stg, T_j
Parameter
Supply Voltage
Supply Current
Power Dissipation at Tamb = 50 °C
Storage and Junction Temperature
Value
Unit
35
V
500
mA
500
mW
– 25 to 150
°C
THERMAL DATA
Symbol
R_{th (j–c)}
Rth (j–a)
Parameter
Thermal Resistance Junction-ambient
Thermal Resistance Junction-pin 4
Max.
Max.
Value
100
70
Unit
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (Tamb = 25^oC, VS = 26V, Vfr = 0, S1 and S2 in "a" position, refer
to the test circuit unless otherwise specified)
Symbol
V_S
I_S
V_ref
– I_ref
V_7(A) ^(*)
V_7(B) ^(*)
Parameter
Supply Voltage
Supply Current
Internal Reference Voltage
Internal Reference Current
Pin 7 Output Voltage
Pin 7 Output Voltage
V_ref/R3
I_fr = 0 µA
I_fr = 30 µA
Test Conditions
Min. Typ. Max. Unit
17 24 30 V
4.5 7 mA
7.6 8.0 8.8 V
0.73
mA
15.3 16.0 16.7 V
15
V
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