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Philips Semiconductors
10.3 Switch-off behavior
10.4 Bandwidth
10.5 Dissipation
9397 750 14728
Product data sheet
To limit the diode current an external 1.5 k carbon high-voltage resistor in series with the
cathode output and a 2 kV spark gap are needed (for this resistor value, the CRT has to
be connected to the main PCB).
V
must be decoupled to GND:
DD
1. With a capacitor > 20 nF with good HF behavior (e.g. foil); this capacitor must be
placed as close as possible to pins V
2. With a capacitor > 3.3 F on the picture tube base print, depending on the CRT size.
The switch-off behavior of the TDA6107AJF is controllable. This is because the output
pins of the TDA6107AJF are still under control of the input pins for low power supply
voltages (approximately 30 V and higher).
The addition of the flash resistor produces a decreased bandwidth and increases the rise
and fall times.
A distinction must first be made between static dissipation (independent of frequency) and
dynamic dissipation (proportional to frequency).
The static dissipation of the TDA6107AJF is due to voltage supply currents and load
currents in the feedback network and CRT.
The static dissipation P
Where:
V
= supply voltage
DD
I
= supply current
DD
V
= DC value of cathode output voltage
oc
I
= DC value of cathode output current
oc
The dynamic dissipation P
Where:
C
= load capacitance
L
C
= internal load capacitance ( 4 pF)
int
f
= input frequency
i
V
= cathode output voltage (peak-to-peak value)
oc(p-p)
= non-blanking duty cycle
The TDA6107AJF must be mounted on the picture tube base print to minimize the load
capacitance.
and GND and must be within 5 mm.
DD
equals: P
= V
stat
stat
DD
equals: P
= 3
dyn
dyn
Rev. 02 — 28 April 2005
TDA6107AJF
Triple video output amplifier
I
+ 3
V
I
DD
oc
oc
V
(C
+ C
)
f
DD
L
int
i
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
V
oc(p-p)
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