(5 pc) TDA9511, Video Amplifier 7-Pin HEPTAWATT
Tax included.
This listing is for 5 pieces
68,600 TOTAL PIECES IN STOCK. SEND OFFERS FOR LARGER QUANTITIES.
DC COUPLING HIGH VOLTAGE VIDEO AMPLIFIER
BANDWIDTH : 40MHz TYPICAL
.
RISE AND FALL TIME : 9ns TYPICAL
.
SUPPLY VOLTAGE : 110V
.
POWER DISSIPATION : 3.0W
.
ESD PROTECTED
DESCRIPTION
The TDA9511 is a video amplifier designed with a
high voltage Bipolar/CMOS/DMOS technology
(BCD). It drives in DC coupling mode one cathode
of a monitor and is protected against flashovers.
It is available in Heptawatt package.
TYPICALAPPLICATION
The TDA9511 consists of :
- A differential amplifier with active load,
- A DMOS output buffer,
- Abandgapvoltagereference(Pin 3forfilteringonly).
PC board lay-out
The best performances are obtained with a carefully
designed HF PC-Board, especially for the
output and input capacitors.
Thefeedback resistor RF must have a low parasitic
capacitor (CF < 0.3pF).
This parasitic capacitor CF must be compensated
by a capacitor R3 (roughly 20 ⋅ CF) connected in
parallel with the input resistor R1.
The full bandwidth of the device is only obtained
with well matched compensation otherwise the
application will have either an integrator response
with a low bandwidth or a differentiator response
with too much ringing.
A diode DP (see Figure 2) has to be connected for
flashover protection
Power dissipation
The power dissipation consists of a static part and
a dynamic part. The static dissipation varies with
the output voltage and the feedback resistor. The
dynamic power dissipationincreases with the pixel
frequency.
For a signalfrequencyof 40MHz and 40VPP output
signal, the typical power dissipation is about 3.0W,
for VDD = 110V.
In first approximation, the dynamic dissipation is :
PD = VDD * CLOAD * ∆VOUT * f
and the total dissipation is :
P=VDD * CLOAD * ∆VOUT *f+VDD * IDD
+ VCC * ICC - (VDD - VOUT
_____
) VOUT
_____
RFEEDBACK
with f = pixel frequency
P = 110V x 10pF x 40V x 40MHz + 110V x 7mA
+12 x 20mA - 602
V/20kΩ = 2.95W
