TDA8174 View Datasheet(PDF) - STMicroelectronics
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Description
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TDA8174 Datasheet PDF : 5 Pages
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TDA8174 - TDA8174W
DC ELECTRICAL CHARACTERISTICS (continued
Symbol
Parameter
Test Conditions
Min.
V4
dV4/Vs
dV4/dI4
Vr
VD11-10
VD1-2
GV
Vfs
V11
V3
I3
t3
Reference Voltage
Reference Voltage Drift Versus Vs
Reference Voltage Drift Versus I4
Internal Reference Voltage
Diode Fwd Voltage
Diode Fwd Voltage
Output Stage Open Loop Gain
V10-11 Saturation Voltage
Pin 11 Scanning Voltage
Trigger Input Threshold
Trigger Input Bias Current
Trigger Input Width
–I4 = 20µA
Vs = 10V to 35V
I4 = 10µA to 30µA
ID = 1.2A
ID = 1.2A
f = 100Hz
–I11 = 1.2A
I11 = 20mA
(see note 1)
VIN = V3- 0.2V
(see note 2)
6.3
4.26
2.6
20
Notes : 1. The trigger input circuit can accept, with a metal option, positive and negative going input pulses.
2.
Th
=
1.2 ⋅ TS
VPP
where : TS is the vertical period and VPP is ramp amplitude at Pin7
Typ.
6.6
1
1.5
4.40
2.2
2.2
60
1.5
1.7
3.0
60
Max.
6.9
2
2
4.54
3
3
2.5
3
3.4
30
Th
Unit
V
mV/V
mV/µA
V
V
V
dB
V
V
V
µA
µS
AC ELECTRICAL CHARACTERISTICS (VS = 24V ; Tamb = 25oC unless otherwise specified)
Symbol
Vs
I1
Is
V1
V8
Tjs
Parameter
Operating Supply Voltage Range
Peak-to-peak Operating Current Range
Supply Current
Flyback Voltage
Sawtooth Pedestall Voltage
Junction Temp. for Thermal Shutdown
Test Conditions
Iy = 2.4App
Iy = 2.4App
Min. Typ. Max. Unit
10
30
V
0.4
A
315
mA
51
V
1.85
V
145
°C
APPLICATION CIRCUIT
10
TDA8174
0 .1 µF
VOLTAGE
R E G ULATOR
4 7 0µF
VS
1 N4 0 0 1
2
F LYBAC K
G E N E R ATOR
100µF
35V
11
TRIG-INP 3
R3
R AMP
GENERATO R
CLOC K P OWE R
P ULS E AMP.
4
180kΩ
BUF FER
S TAGE
7
8
47nF
THE RMAL
P ROTEC TION
9
6
220kΩ
1
2 .2 Ω
0 .2 2 µF
330Ω
R y = 9.6Ω
YOKE Ly = 24.6mH
Iy = 1.2App
1 kΩ
1.2kΩ
2 2 µF
2.4kΩ
1 5 0 0 µF
1.2Ω
3/5
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