TDA9536 STMicroelectronics, TDA9536 Datasheet - Page 7

• Manufacturer Part Number: TDA9536
• Manufacturer: STMicroelectronics

Specifications of TDA9536

• Single Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Supplier Unconfirmed

6.3 - Amplifier gain and cut-off adjustment
A very simplified schematic of each TDA9536
channel is shown in
The feedback net of each channel is integrated
with a built-in voltage gain of 19.3 (40k/2k).
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 por-
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.
Figure 4. Arcing protection network (one channel)
(
*
): To be connected as close as possible to the device.
TDA9535
TDA9536
IN
GND
V
Figure
DD
OUT
3.
100nF/250V
C12
150 /0.5W
( * )
R10
2k
V
REF
4.7 F/150V
C24
40k
R29
10
The output voltage V
formula:
V
for
V
The arcing network that we recommend (see
Figure
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.
33
0.39 H
R19
L1
OUT
OUT
VG
FDH400
+
GND
-
V
= (VG+1) x
= 111.6 - 19.3 x V
D12
High Voltage (90-110V)
DD
4) provides efficient protection without de-
= 19.3 and
.
V
150 /0.5W
V
Spark gap
REF
REF
R11
OUT
F1
IN
-
= 5.5V, we have
is given by the following
(VG
100nF
OUT
C18
x V
IN
)
TDA9536
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