150W LLC transformer

The LLC converter consists of four modules: a power switching network (half bridge or full lattice bridge), a resonant capacitor (C), a resonant inductor (L), a transformer excitation inductor (L), a transformer and a diode rectifier.

The MOSFET power switch first converts the input DC voltage into high-frequency square wave. Then the square wave enters the resonator, by which the harmonic of the square wave is eliminated and the sine wave of the fundamental frequency is output. Then the sine wave is transmitted to the secondary side of the converter through the high-frequency transformer, and the voltage is boosted or reduced according to the application demand; Finally, a diode rectifier converts the sine wave into a stable DC output.

LLC, as a typical harmonic converter, is a harmonic circuit that realizes constant output voltage by controlling the switching frequency (frequency regulation).

The 150W LLC transformer customized by YLZ has the advantages of high switching frequency, low switching loss, wide allowable input voltage range, high efficiency, light weight, low EMI noise, and low switching stress for HR1211 and TEA2016 chips.

With the progress of science and technology and the development of electronic technology, more and more electronic devices need to use transformer components, and LLC(resonant) transformer with its no-load working ability and the ability of resonant tank current to reflect the load weight reflects the advantages of ordinary series resonant transformers and parallel resonant transformers can not be compared, so it has been widely used.

For more knowledge about transformers, you can consult Zou Gong, senior design engineer of Shenzhen YLZ Technology Co., LTD.