3MHz GaN DC-DC 48Vin direct to 0.6Vout realized by ultra-short pulse(5ns) using Virtual Peak Current Mode control technique
Conference: PCIM Asia 2023 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
08/29/2023 - 08/31/2023 at Shanghai, China
doi:10.30420/566131035
Proceedings: PCIM Asia 2023
Pages: 6Language: englishTyp: PDF
Authors:
Takobe, Isao; Yamashita, Hiroshi; Otani, Junki; Kawano, Akihiro; Zaitsu, Toshiyuki (ROHM Co., Ltd., Japan)
Abstract:
This paper presents a novel DC-DC converter solution that utilizes Virtual Peak Current Mode (PCM) control technique in conjunction with GaN FET buck converters for a high-frequency and a high step-down conversion. The proposed control method senses the off-period inductor current from the previous cycle, which is then utilized as the present cycle current, allowing for ultra-short pulse operation. A prototype board was imple-mented with a 150V GaN FET and a developed Virtual PCM control chip. It demonstrated a pulse width of 5ns at 3MHz frequency, in 48Vin and 0.6Vout/5A. The results indicate that the proposed solution offers promising potential for a variety of non-isolated step-down applications.