Название: Fully Integrated High-Voltage DC-DC and AC-DC ConversionАвтор: Tuur Van Daele, Filip Tavernier
Издательство: Springer
Серия: Analog Circuits and Signal Processing
Год: 2025
Страниц: 137
Язык: английский
Формат: pdf (true), epub
Размер: 33.4 MB
This book reveals to readers how to harness high-voltage power for everyday electronics. The authors detail the transformation of up to 400 V—from household outlets and electric vehicle batteries—into the low voltage required for devices like smart home systems and LED lights. This concise guide delves into the cutting-edge integration of DC-DC and AC-DC converters onto a single microchip using a high-voltage switched-capacitor approach. Explore expert insights on topology, circuit design, and layout techniques that are shaping the future of power management.
- Introduces the first-ever fully integrated DC-DC converter capable of handling up to 400 V;
- Enables a fully integrated mains-supplied AC-DC converter with power density of 5K x greater than existing solutions;
- Explores high-voltage fully integrated converters, with high-level analyses, practical circuits and layout techniques.
High-voltage (48 V–400 V) power sources are prevalent in our surroundings. The AC mains is found along the walls and ceilings of buildings, and DC buses are shifting to higher voltages such as 48 V and 400 V in sectors such as the automotive industry and data centers. In contrast, the growing demand for low-power applications calls for low DC supply voltages (≤5 V). This trend is driven by the push for enhanced functionality and decentralization, which requires small distributed nodes equipped with sensors, actuators, and microcontrollers. Applications range from internet-of-things (IoT) nodes powered by the AC mains to control circuitry and other peripheries in electric cars supplied with high DC voltages.
To bridge the gap between high-voltage power sources (DC and AC) and low-voltage applications, a voltage converter is required. This work focuses on input voltages in the range of 400 V, which aligns with the AC mains voltage and high-voltage DC buses in electric cars and industrial environments. The intended output power is the milliwatt range, suitable for applications such as home automation, grid infrastructure, LEDs, and control circuits.
Existing solutions for 400 V with milliwatt output power are moving toward integration to improve cost-efficiency, compactness, and reliability. This evolution is characterized by an increased switching frequency to reduce the passive component size. However, the most integrated approach still requires two external components, including a cumbersome inductor. Further downsizing is constrained by the extremely low duty cycle imposed by the high conversion step, restricting higher switching frequencies. In addition, the reliance on an inductor is unsuitable as its quality deteriorates significantly when integrated.
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