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PDF TEA5101A Data sheet ( Hoja de datos )
| Número de pieza | TEA5101A | |
| Descripción | RGB HIGH VOLTAGE VIDEO AMPLIFIER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TEA5101A (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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TEA5101A
RGB HIGH VOLTAGE VIDEO AMPLIFIER
... BANDWIDTH : 10MHz TYPICAL
RISE AND FALL TIME : 50ns TYPICAL
CRT CATHODES CURRENT OUTPUTS FOR
... PARALLEL OR SEQUENTIAL CUT-OFF OR
DRIVE ADJUSTMENT
FLASHOVER PROTECTION
POWER DISSIPATION : 3.5W
ESD PROTECTED
DESCRIPTION
The TEA5101A includes three video amplifiers
desi-gned with a high voltage DMOS/bipolar tech-
nology. It drives directly the three CRT cathodes.
The device is protected against flashovers. Due to
its three cathode current outputs, the TEA5101A
can be used with both parallel and sequential sam-
pling applications.
PIN CONNECTIONS (top view)
MULTIWATT 15
(Plastic Package)
ORDER CODE : TEA5101A
Tab connected to Pin 8
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BLUE FEEDBACK
BLUE CATHODE CURRENT
BLUE OUTPUT
GREEN FEEDBACK
GREEN CATHODE CURRENT
GREEN OUTPUT
RED FEEDBACK
GROUND
RED OUTPUT
RED CATHODE CURRENT
VDD HIGH VOLTAGE
RED INPUT
GREEN INPUT
VCC LOW VOLTAGE
BLUE INPUT
June 1993
1/6
1 page  
TEA5101A
APPLICATION INFORMATION
PC BOARD LAYOUT
The best performances of the high voltage video
amplifier will be obtained only with a carefully desi-
gned PC board. Output to input capacitances are
of particular importance.
For a single amplifier, the input-output capaci-
tance, in parallel with the relatively high feedback
resis-tance, creates a pole in the closed-loop trans-
fer function. A low parasitic capacitance (0.3pF)
feedbackresistor and HF isolated printed wires are
necessary. Further more, capacitive coupling from
the output of an amplifier toward the input of an-
other one may induce excessive crosstalk.
POWER DISSIPATION
The power dissipation consists of a static part and
a dynamic part. The static dissipation varies with
the output voltage. With VDD = 200V, Pstat = 2.6W
typ(3.5W max) at VOUT = 100V, 1.5W typ at 150V
and 3W typ at 50V (with R feedback = 39kΩ).
VOUT first value (100V) will be the reference.
The dynamic dissipation depends on the signal
spectrum and the load capacitance.
- Dynamic power with a typical picture with 150 Vpp
modulation is typically 1W.
- For a sine wave, dynamic dissipation peramplifier
is Pd = F x Cl x Vopp x Vdd x 0.8.
The load capacitance CL includes CRT and board
capacitance (10pF), and amplifier output capaci-
tance (8pF) : total CL value is about 20pF. For a
5MHZ, 50 Vpp sine wave and a 20pF load capaci-
tance, the maximum dynamic power is 2.5W.
- Generally, the maximum dynamic power is
reached with a white noise (tuner noise).
- Typical value is about 2W.
Total dissipation is typically 3.6W (2.6W + 1W).
With a maximum static dissipation of 3.5W, total
dissipation is :
- 4.5W with a typical picture (UER pattern)
- 5.5W with white noise
5/6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet TEA5101A.PDF ] | |
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