TDA8145 View Datasheet(PDF) - STMicroelectronics
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TDA8145 Datasheet PDF : 9 Pages
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TDA8145
Table 3. ELECTRICAL CHARACTERISTICS
(Tamb = 25°C, VS = 26V, Vfr = 0, S1 and S2 in "a" position, refer to the test circuit unless otherwise
specified)
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VS
Supply Voltage
17 24 30
V
IS
Supply Current
4.5 7
mA
VREF Internal Reference Voltage
7.6 8.0 8.8
V
–IREF Internal Reference Current
Vref/R3
0.73
mA
V7(A) (*) Pin 7 Output Voltage
Ifr = 0 µA
15.3 16.0 16.7 V
V7(B) (*) Pin 7 Output Voltage
Ifr = 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 = V7E – V7F,
– 40
40 mV
I8
Current Source
S1 → b
100
µA
VSATL Saturation Voltage
Io = 400 mA Sink S2 → b
1
2
V
VSATH Saturation Voltage
Io = 100 mA Source S2 → c S1 → b
0.8 1.5
V
VF
Forward Voltage
Io = 400 mA S2 → d S1 → b
1.2 1.7
V
IFR
Frame Sawtooth Current
Vfr = 6.6 VPP
66
µA
Figure 4. Test Circuit
VS
R7
R6
10kΩ
10kΩ
VF
IFR
7
6
VSATH
2
a
VFR
R2
S2
b
1 TDA8145 5
R1
3
c
d
10kΩ
R3
11kΩ
4
8
VREF
IF
-IO
R8
20kΩ
b
a
S1
IO
VSATL
3/9
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