A common resonant converter topology used in power supply designs is the LLC topology. Due to its excellent efficiency, low noise, and favorable transient response, it is a well-liked option. “Inductor-Inductor-Capacitor,” the abbreviation LLC, refers to the three reactive components employed in the circuit. The output voltage is regulated using the resonant frequency of the LC circuit via the LLC topology, which is a form of resonant converter.
In light of this, the phrase “LLC in power supply” refers to the application of the LLC topology while developing power supplies. The LLC resonant converter can run at high frequencies without experiencing large switching losses, making it particularly well-suited for high-power applications like server power supply. Additionally, the LLC topology offers soft switching, which lessens electromagnetic interference (EMI) and increases the lifespan of power components.
A particular LLC topology implementation that is frequently utilized in high-power applications is the LLC half bridge. Two inductors, two capacitors, and two switches are used in a half-bridge topology to control the output voltage. In comparison to full-bridge implementations, the half-bridge configuration offers a simpler and more affordable design that nonetheless offers great efficiency and strong transient response.
The DAB (Digital Audio Broadcasting) converter is another crucial element in the design of power supplies. A radio receiver that transforms digital radio transmissions into analog audio signals is known as a DAB converter. It is frequently utilized in home and auto audio systems. To produce high-quality audio output, the DAB converter combines analog circuitry with digital signal processing (DSP).
An inductor and a capacitor are connected in parallel to create an LC circuit, a form of resonant circuit. The capacitor and inductor in an LC circuit exchange energy at the circuit’s resonant frequency when an AC voltage is applied. A sinusoidal waveform is produced by this energy transfer and is employed in many electrical applications. Many various kinds of circuits, such as filters, oscillators, and power supply, use LC circuits.
To sum up, LLC topology is an effective tool for creating stable and effective power supplies. It offers gentle switching, excellent efficiency, and strong transient performance. A common LLC topology implementation utilized in high-power applications is the LLC half bridge. A radio receiver that transforms digital radio transmissions into analog audio signals is known as a DAB converter. Many various kinds of electrical circuits use LC circuits, a sort of resonant circuit. Any person interested in power supply design has to understand these ideas.
An LLC requires a resonant converter because it effectively transfers energy between the input and output using resonant parts like inductors, capacitors, and transformers. While maintaining high efficiency, the resonant converter aids in lowering switching losses and electromagnetic interference (EMI). Soft switching is also possible, reducing strain on the power system’s components and enhancing reliability. Overall, the performance and operation of an LLC architecture in power supply applications depends on the resonant converter.
In order to lower switching losses and electromagnetic interference (EMI) in switching circuits, zero voltage switching, or ZVS, is a technique used in power electronics. In order to reduce stress on the switch and EMI, it entails turning on a power switch while the voltage across it is zero. ZVS is frequently utilized in LLC resonant converters, which produce ZVS and high efficiency via a resonant tank circuit.