| Autor: |
Giacomo Calabrese, Maurizio Granato, Aleksandar Prodic, Liangji Lu, Giovanni Frattini |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
2019 IEEE Applied Power Electronics Conference and Exposition (APEC). |
| DOI: |
10.1109/apec.2019.8721855 |
| Popis: |
This paper explores the challenges and introduces a solution for near zero-ripple current region operation of multilevel flying capacitor (ML-FC) converters, operating in peak and valley current programmed mode (CPM). Around the zero-ripple region, the triangular inductor current ripple waveform is modified to be trapezoidal using a state machine. Seamless transition between peak and valley is desirable to ensure symmetrical stable operation below and above the duty-cycle yielding zero-ripple current. In both cases, flying capacitor voltage inherent stabilization is achieved. The investigated ideas are verified with a three-level FC buck converter with 5 V output operating at 500 kHz nominal switching frequency near 50% duty-cycle, the zero-ripple current region. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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