A switched-capacitor charge tripler is a type of circuit used for AC-DC conversion, specifically for voltage multiplication. It is a variation of the switched-capacitor voltage multiplier circuit, designed to triple the input voltage level.
Here's a description of how a switched-capacitor charge tripler operates:
Basic Principle: The switched-capacitor charge tripler operates on the principle of transferring charge between capacitors using switches. By properly timing the opening and closing of switches, the circuit can accumulate and transfer charge, resulting in a voltage multiplication effect.
Configuration: The circuit consists of several stages, each composed of capacitors and switches. In each stage, capacitors are connected in series and parallel using switches to achieve the desired voltage multiplication.
Charging Phase: The process begins when an AC input voltage is applied. During the charging phase, the switches are closed in a specific sequence. When a switch is closed, it connects a pair of capacitors in parallel, allowing them to share charge. This action increases the voltage across the combined capacitor pair.
Transfer Phase: Once the capacitors are charged in parallel, the switches are opened in a specific sequence to disconnect the capacitors from the input and connect them in series. Now, the voltage across the combined capacitors adds up, resulting in a higher voltage level compared to the original input voltage.
Tripling the Voltage: By properly selecting the capacitor ratios and switch timing, the output voltage can be tripled compared to the input voltage. This voltage multiplication occurs because the charge transfer and combination of capacitors in series effectively add the voltages together.
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