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TDA2653A 데이터시트(PDF) 7 Page - NXP Semiconductors

부품명 TDA2653A
상세설명  Vertical deflection circuit
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
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TDA2653A 데이터시트(HTML) 7 Page - NXP Semiconductors

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January 1991
7
Philips Semiconductors
Product specification
Vertical deflection circuit
TDA2653A
APPLICATION INFORMATION
The function is described against the corresponding pin number
1, 13.
Oscillator
The oscillator frequency is determined by a potentiometer at pin 1 and a capacitor at pin 13.
2.
Sync input/blanking output
Combination of sync input and blanking output. The oscillator has to be synchronized by a positive-going
pulse between 1 and 12 V. The integrated frequency detector delivers a switching level at pin 12.
The blanking pulse amplitude is 20 V with a load of 1 mA.
3.
Sawtooth generator output
The sawtooth signal is fed via a buffer stage to pin 3. It delivers the signal which is used for linearity control,
and drive of the preamplifier. The sawtooth is applied via a shaping network to pin 11 (linearity) and via a
resistor to pin 4 (preamplifier).
4.
Preamplifier input
The DC voltage is proportional to the output voltage (DC feedback). The AC voltage is proportional to the
sum of the buffered sawtooth voltage at pin 3 and the voltage, with opposite polarity, at the feedback
resistor (AC feedback).
5.
Positive supply of output stage
This supply is obtained from the flyback generator. An electrolytic capacitor between pins 7 and 5, and a
diode between pins 5 and 9 have to be connected for proper operation of the flyback generator.
6.
Output of class-B power stage
The vertical deflection coil is connected to this pin, via a series connection of a coupling capacitor and a
feedback resistor, to ground.
7.
Flyback generator output
An electrolytic capacitor has to be connected between pins 7 and 5 to complete the flyback generator.
8.
Negative supply (ground)
Negative supply of output stage and small signal part.
9.
Positive supply
The supply voltage at this pin is used to supply the flyback generator, voltage stabilizer, blanking pulse
generator and buffer stage.
10.
Reference voltage of preamplifier
External adjustment and decoupling of reference voltage of the preamplifier.
11.
Sawtooth capacitor
This sawtooth capacitor has been split to realize linearity control.
12.
50 Hz/60 Hz switching level
This pin delivers a LOW voltage level for 50 Hz and a HIGH voltage level for 60 Hz. The amplitudes of the
sawtooth signals can be made equal for 50 Hz and 60 Hz with these levels.


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