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參數(shù)資料
| 型號(hào)： | TDA9535 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PZIP11 |
| 封裝： | PLASTIC, CLIPWATT-11 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大小： | 1749K |
| 代理商： | TDA9535 |
TDA9535
7/15
6.3 - Amplifier gain and cut-off adjustment
A very simplified schematic of each TDA9535
channel is shown in Figure 3.
The feedback net of each channel is integrated
with a built-in voltage gain of 19.3 (40k/2k).
The output voltage VOUT is given by the following
formula:
VOUT =(VG+1) x VREF - (VG xVIN)
for VG = 19.3 and VREF = 5.5V, we have
VOUT =111.6 - 19.3x VIN
Figure 3. Simplified schematic of one channel
7 ARCING PROTECTION
As the amplifier outputs are connected to the CRT
cathodes, special attention must be given to pro-
tect them against possible arcing inside the CRT.
Protection must be considered when starting the
design of the video CRT board. It should always
be implemented before starting to adjust the dy-
namic video response of the system.
The arcing network that we recommend (see
Figure 4) provides efficient protection without de-
teriorating the amplifier video performances.
The total resistance value between the amplifier
and the CRT cathode (R10+R11) should not be
less than 300
.
Spark gap diodes are strongly recommended for
protection against arcing.
Figure 4. Arcing protection network (one channel)
2k
40k
GND
VDD
OUT
IN
VREF
+
-
R11
R29
10
150
/0.5W
C18
100nF
C24
4.7
F/150V
C12
100nF/250V
R19
33
R10
150
/0.5W
L1
0.39
H
D12
FDH400
F1
TDA9535
High Voltage (90-110V)
VDD
GND
OUT
Spark gap
(*)
(*): To be connected as close as possible to the device.
TDA9536
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9536 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:7.5 NS TRIPLE HIGH VOLTAGE VIDEO AMPLIFIER |
| TDA9550 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV signal processor-Teletext decoder with embedded m-Controller |
| TDA9556 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:7.5 NS TRIPLE-CHANNEL HIGH VOLTAGE VIDEO AMPLIFIER |
| TDA955X | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV signal processor-Teletext decoder with embedded m-Controller |
| TDA955XN1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV signal processor-Teletext decoder with embedded m-Controller |
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