场输出集成块的工作原理简介（国外英文资料）.docVIP

场输出集成块的工作原理简介（国外英文资料） Description of the work principle of field output integration block The various field output integration blocks widely used in color TV are used in the current system. Both are using 25 v power supply, the flyback use booster circuit produces 50 v power supply, which can guarantee are linear, shortening the time of blanking, meet the needs of the flyback cut implicit, avoid flyback lines; It can also improve the efficiency of field output circuits. This kind of working voltage of the circuit is usually 22 - about 30 v, output pulse voltage about 50 vp - P, pulse current is about 0.5-3 - P ap, electrical process 0.1-0.4 A suitable and deflection coil with low impedance. Through analysis, although most of the external circuits of the output integrated circuit are different, the function of six terminals and the peripheral circuit are basically the same, namely: The Vcc end of the power supply is supplied by the pulse rectifier, or directly by the switch. For the whole output part of the work supply, this foot is also connected to the positive electrode of the booster diode, and some models have a low-voltage power supply for driving. Earthed Gnd. The pulse voltage of the field oscillating circuit is generated by the pulse voltage of the field, which produces the pulse voltage from the bottom (1VP - P). The pulse output Vout end, the 50VP -p, 0.5-3ap-p that the field output circuit produces, the output of the foot, feed the deflection coil. Vup booster output end, the feet are connected to the booster capacitor anode, the presence of flyback generated when close to the power supply voltage of the boost voltage, and power supply voltage to send, have the effect of blanking the booster. The output level of the Vcs side is connected to the negative pole of the booster diode. It is connected to the positive electrode of the booster, and provides about 50V power supply during the reverse. In addition, field output integration has 1 to 3 other auxiliar