24V power supply CRT high voltage power generating circuit

Published:2011/7/8 5:54:00 Author:TaoXi | Keyword: 24V, power supply, CRT, high voltage, power generating | From:SeekIC

Some cameras' CRT uses the 11.4cm flat CRT as the display unit, the anode voltage of the high-voltage component is +20kv, the focusing electrode voltage is +3.2KV, the accelerating electrode voltage is +1000V, the power supply of the high-voltage component is 24V DC. The basic principle: the pulse generator is composed of the NE555, the potential regulator VR2 can make it produce the 20KHz pulse, the potentiometer VR1 adjusts the pulse width. The TR1 is the driver stage, the pulse transformer T1 uses the reverse polarity incentive. The high voltage protection circuit is composed of the D3, D9, VR3, R7 and the D4, R6, TR3. The VR2 can be used to adjust the frequency, you can adjust the high voltage by adjusting VR2.



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