TEA2031A Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
TEA2031A Datasheet PDF : 11 Pages
| |||
TEA2031A
the required current via a series resistor to pin 1.
Likewise, the current to pin 2 is drawn through a
series resistor from an external dc voltage source.
These series resistors can have values of around
40kΩ resulting in input currents of approximately
0.1mA ± modulation current.
Pin 7 should be loaded to ground through a 100kΩ
resistor which as a result will produce a parabola
of 5 volts peak-to-peak at pin 7. This parabola is
symmetrical if the DC current flowing into pin 2 is
equal to the mean input current of pin 1. Other-
wise, the parabola becomes dissymmetrical and
produces a keystone effect correction.
The line saw-tooth at pin 8 is obtained by feeding
the line fly-back voltage through an integrator net-
work formed by a diode and a grounded capacitor
(see typical application diagram). The DC compo-
nent of the line saw-tooth is compensated by an in-
ternal current sinking source ; so that the mean DC
values of line saw-tooth and frame parabola volt-
ages are equal.
Line saw-tooth and frame parabola signals are ap-
plied to a comparator whose output is in the form
of width modulated pulses. During every pulse du-
ration, the output (pin 5) can sink external coil cur-
rents of up to 0.5A associated with diode
modulator of the main horizontal scanning circuit.
An internal recovery diode feeds back the fly-back
energy of the coil to the power supply. This diode
can carry currents of up to 0.5A.
Table 1. Absolute Maximum Ratings
Symbol
Parameter
V6–4
Supply Voltage
I5–4
Output Sink Current
I5–6
Diode Output Current
I1 and I2
Input Current
PTOT
Power Dissipation
TSTG
Storage Temperature Range
I5–4
Non Repetitive Peak Current on Output Transistor
I5–6
Non Repetitive Peak Current on Output Diode
Value
Unit
35
V
0.5
A
0.5
A
– 0.5
mA
0.8
W
– 20 to 150
°C
1.5
A
1.5
A
Table 2. Thermal Data
(Tamb = + 50°C)
Symbol
Parameter
Rth (j-a)
Junction-ambient Thermal Resistance
Value
80
Unit
°C/W
Table 3. ELECTRICAL OPERATING CHARACTERISTICS
Symbol
Parameter
Min. Typ. Max. Unit
V6–4
Supply Voltage
16
24
35
V
I6
Supply Current (R(3-4) = 22kΩ ; IOUT = 0)
4
6
mA
No Load Consumption (R(3-4) = 22kΩ ; IOUT = 0 ; V(6-4) = 24V)
100 150 mW
V3–4
Voltage Reference (R(3-4) = 22kΩ)
5.9 6.3 6.7
V
I1mean
Frame Saw-tooth Input DC Mean Current
R1 = 39kΩ at 2.5V Mean - saw-tooth Voltage
0.1
mA
I1PP
Frame Saw-tooth Input Peak-to-peak Current
R1 = 39kΩ at 2.5V Mean - saw-tooth Voltage
70
µA
I2
Keystone Correction Input DC Current
If I1 Mean = I2 : No Keystone Effect. R2 = 39kΩ at 2.5V DC ref.
0.1
mA
∆I2
Keystone Correction Input DC Current for Maximum Keystone Effect
± 12.5
µA
3/11
Share Link: 