直流升压转换器电路图(Low-to-High DC Voltage Converter)
下图是一由低压直流电转换成高压直流的电源转换器电路图，基本工作原理是555芯片为一多谐振荡器，产生一定频率的信号，经变压器升压及整流二极管1n4004，滤波电容C2整流平滑后输出一高压直流电。输出电压的幅度由变压器T1的匝数数决定。如图中所示初次级比为6.3:220.所以该电路将9V电压升压到200V直流电压输出。
Figure 1. Circuit Diagram for a Low-to-High DC Voltage Converter.This is a circuit for converting a low DC voltage into a very high DC voltage. The 555 timer IC in this circuit is configured as an astable multivibrator, i.e., it generates a continuous signal of given frequency. This periodic signal is fed into the low-side winding of a transformer.
The resulting pulsating current in the low-side winding results in a high AC voltage across the high-side winding. The level of this voltage depends on the voltage ratio of the transformer used. The example above uses a transformer with a voltage ratio of 6.3V:220V, which can easily generate voltages in excess of 200 volts from a 9-volt battery.
The current in the output winding is rectified using a diode, and a capacitor is used to 'smoothen' the rectified voltage waveform, producing a DC voltage. R3 is required to 'bleed' the capacitor charge to ground when the circuit is not in operation. Warning: C2 can store a high voltage, so extreme care is needed when working with this circuit (e.g., the output must not be touched).