Contents
What is LLC resonant converter?
The LLC converter is a resonant inverter with three reactive elements where the DC input voltage is turned into a square wave by a switch… Block Diagram. Products. Solutions.
What are the different types of DC DC converter?
Types and Characteristics of DC/DC Converters
| Circuit type | Output power | |
|---|---|---|
| Non-Isolated | SEPIC, Zeta | Medium |
| Charge pump | Small | |
| Isolated | Forward transformer | High |
| Fly-back transformer | Medium |
What is load resonant converter?
Loaded resonant converters are converters that utilize the soft-switching techniques. A loaded resonant converter works by inverting a DC input into an AC waveforms and rectifying the AC waveform back into a DC signal. The circuit consists of a bridge converter, a resonant tank, a rectifier, and an output filter.
How do resonant converters work?
A regular LLC resonant half bridge converter works a combination mode of a voltage divider and amplifier of resonant inductor voltage of the resonant tank. At the resonant frequency, impedance of resonant tank is zero, which means the input voltage is 100% applied on the load.
How is the LLC resonant converter similar to the LLC converter?
The design method for CLLLC power stage is similar to the LLC converter. The resonant elements in secondary are all referred to primary and the equivalent circuit yields the transfer function. To simplify design step, reflected Lrs is assumed same as Lrp and a ratio of reflected Crs to Crp is set.
Which is the best LLC DC DC converter?
This article presents popular LLC and LLC derived bidirectional converter topologies described in the literature. Selection of dc-dc converter scheme for On-Board Charger (OBC) is based on efficiency, performance and power density targets, for which resonant converters are preferred choice.
Which is the best DC-DC converter for OBC?
Resonant converter is undoubtedly the preferred choice for dc-dc conversion for OBC. With modern day wide bandgap devices, designers can easily target the high efficiency at high frequencies. Popular resonant converter configurations based on LLC converter are described in the article.
Why are resonant converters used for high power?
For high power, resonant converters are preferred as they offer soft switching in all devices even at high frequency with low EMI. Low component count, utilization of transformer leakage inductance for resonance and absence of snubber/clamp circuitries are other added advantages. FETs based rectifier makes converter bidirectional.