Title | ||
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15.3 A 100W and 91% GaN-Based Class-E Wireless-Power-Transfer Transmitter with Differential-Impedance-Matching Control for Charging Multiple Devices |
Abstract | ||
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Having multiple devices charged by a wireless-power-transfer (WPT) system has become more common as illustrated in Fig. 15.3.1. A wide-power-range (no load $\sim 100\mathrm {W})$, compact, and efficient WPT system needs to include the following features. First, an impedance-matching technique that achieves zero-voltage switching (ZVS) and zero voltage-derivative switching (ZVDS) on a Gallium Nitride (GaN) switch is needed to reduce the efficiency loss caused by hard switching (HS) and reverse conduction (RC). Second, under high-power conditions, it is desirable to reduce the voltage and current stress on each switch and passive components. Third, there is a need to reduce the number of external components for compact size. In [1] and [2], an external capacitor array for impedance matching occupies a large printed circuit board (PCB) area. If the output power is as high as 100W, the controlled switch needs to withstand high voltage stresses of up to 600V. The fractional-capacitance tuning technique in [3] achieves a wide range of equivalent capacitance, but there are still high-voltage-stress problems similar to [1], [2]. Although [4] provides a high-power solution, the voltage-controlled-capacitance (VCC) technique needs to tune the internal parasitic capacitance, $\mathrm {C}_{\mathrm {OSS}}$, from 350 to 3500pF and thus requires more external components and large bias voltage $\mathrm {V}_{\mathrm {BIAS}}$. |
Year | DOI | Venue |
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2019 | 10.1109/ISSCC.2019.8662535 | 2019 IEEE International Solid- State Circuits Conference - (ISSCC) |
DocType | ISBN | Citations |
Conference | 978-1-5386-8531-0 | 0 |
PageRank | References | Authors |
0.34 | 0 | 9 |
Name | Order | Citations | PageRank |
---|---|---|---|
Cheng-Yu Xie | 1 | 0 | 0.34 |
Shang-Hsien Yang | 2 | 7 | 4.07 |
Shen-Fu Lu | 3 | 0 | 0.34 |
Fa-Yi Lin | 4 | 0 | 0.34 |
Yen-An Lin | 5 | 4 | 1.51 |
You-Zheng Ou-Yang | 6 | 4 | 1.17 |
Ke-Horng Chen | 7 | 379 | 90.04 |
Kuo-Chi Liu | 8 | 0 | 0.34 |
Ying-Hsi Lin | 9 | 112 | 30.84 |