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TDA9511
DC COUPLING HIGH VOLTAGE VIDEO AMPLIFIER
TDA9511DC COUPLING HIGH VOLT AGE VIDEO AMPLIFIER
April 1998
PIN CONNECTIONS
PIN CONFIGURATION BANDWIDTH : 40MHz TYPICAL. RISE AND FALL TIME : 9ns TYPICAL. SUPPLY VOLTAGE : 110V. POWER DISSIPATION : 3.0W. ESD PROTECTED
DESCRIPTIONThe 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.
1/5
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Note 1 : Pulsed current t ≤ 50μs
THERMAL DATA
TDA95112/5
ELECTRICAL CHARACTERISTICS (VCC = 12V, VDD = 110V, Tamb = 25o C, unless otherwise specified)
Note 2 : Characterized and not tested.
Figure 1 : Measurement of Input Voltage
TDA95113/5
Figure 2 : Typical Evaluation Schematic
TYPICAL APPLICATIONThe TDA9511 consists of : A differential amplifier with active load, A DMOS output buffer, A bandgap voltage reference (Pin 3 for filtering only).
PC board lay-outThe best performances are obtained with a care-
fully designed HF PC-Board, especially for the
output and input capacitors.
The feedback 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 dissipationThe 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 dissipation increases with the pixel
frequency.
For a signal frequency of 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 * ΔVOUT * f
and the total dissipation is :
P = VDD * CLOAD * ΔVOUT * 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
Recommended values :
R1 = 1kΩ, R2 = 1.8kΩ, RF = 20kΩ, RP = 200Ω,
C4 > 10nF, C3 = 10 to 12pF for CF # 0.5pF.
R3 # 150Ω.
TDA95114/5
PACKAGE MECHANICAL DATA : 7 PINS - PLASTIC HEPTAWATT
. However, SGS-THOMSON Microelectronics assumes no responsibility
for the or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.© 1998 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I2
C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips2
C Patent. Rights to use these components in a I2
C system, is granted provided that the system conforms to
the I2
C Standard Specifications as defined by Philips.
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TDA95115/5
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