The front-end converter consists of a single-phase Boost power factor corrector and a DC/DC asymmetrical half-bridge (Asymmetrical Half-Bridge, AHB) converter. The AHB converter circuit with an output power of 1 kW is shown in the figure. The secondary side of the transformer adopts a current doubler rectifier output. The integrated converter consists of two integrated modules, active and passive, and rectifier and output filter capacitors. The IC in the figure is an integrated circuit chip for drive, control, detection, protection, etc. The parameters of the AHB converter are input voltage, voltage of 300~415V (DC) output 48 (1±10%) V, 1 kW, output voltage ripple 480 mV, and operating frequency 20.0~500 kHz.
The integrated AHB converter includes two integrated modules: active and passive.
Figure AHB converter circuit
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