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东芝X-56P机心开关稳压电源 东芝X-56P机心开关稳压电源属于脉冲变压器耦合并联型自激开关电源,它采用脉冲频率调制方式来稳定输出电压,它的振荡频率不与行频同步,而是随着输出电压的升高而升高,开关振荡中心频率约为35kHz。该电源稳压范围宽,效率高。国产彩电很多机型都采用了这种电源。 开关振荡与脉冲频率调制原理 图5所示是东芝X-56P机心开关稳压电源原理简图。图中Q901是开关管,Q902、Q903是脉冲频率调制管,Q904是稳压比较放大器,R908、R909是开
Toshiba X-56P core switch power supply Toshiba X-56P core switch power supply belongs to the pulse transformer coupled parallel self-excited switching power supply, which uses pulse frequency modulation to stabilize the output voltage, and its oscillation frequency and line frequency Synchronization, but with the output voltage increases, the switching oscillation center frequency is about 35kHz. The power regulator range, high efficiency. Many domestic TV models have adopted this power. Switching oscillation and pulse frequency modulation principle Figure 5 shows the Toshiba X-56P core switch power supply schematic. Figure Q901 is the switch, Q902, Q903 is a pulse frequency modulation tube, Q904 is a voltage regulator amplifier, R908, R909 is open