@inproceedings{7b6541f33d954b7e978f2bd6d1d41999,

title = "A High-Conversion-Ratio and 97.4% Peak-Efficiency 3-Switch Boost Converter with Duty-Dependent Charge Topology for 1.2A High Driving Current and 20% Reduction of Inductor DC Current in MiniLED Applications",

abstract = "Today's miniLED displays can be divided into multiple arrays. Each miniLED array with 900 pixels can have 60 channels where each channel has 15 LEDs connected in series. To drive multi-channel miniLEDs in parallel from a low input voltage \mathrm{V}_{\mathrm{I}\mathrm{N}}(=6V), a boost converter with high output voltage (up to 30V) and high output current (up to 1. 2A for 2000 nits) is required where the conversion ratio (CR =\mathrm{V}_{0\cup \mathrm{T}}/\mathrm{V}_{\mathrm{I}\mathrm{N}}) is 5. Since the inductor current I_{L}=I_{LOAD}/(1-D) of the conventional 2-switch (2S) boost converter is high, where \mathrm{I}_{\mathrm{L}0\mathrm{A}\mathrm{D}} is the load current and D is the duty cycle, 2S boost converters have low efficiency and high output voltage ripple. AIthough the boost converter assisted by a series flying capacitor \mathrm{C}_{\mathrm{F}} can reduce the inductor current level to improve efficiency [1] -[5], \mathrm{C}_{\mathrm{F}} lacks energy under high CR and high loading conditions. At the top of Fig. 17.9.1, both techniques in [1] and [2] charge the \mathrm{C}_{\mathrm{F}} during \varphi 2. ln case of high CR, the duration of \varphi 2 becomes small to seriously affect the charging time. Hence, due to insufficient charge stored in \mathrm{C}_{\mathrm{F}}, the driving capability will decrease. At no load (left of Fig. 17.9.2), [1] fails to regulate and D is 0.87 in [2] to haveCR=5. lnterestingly, both [1] and [2] fail to have CR=5 at load current =1.2A. AIthough additional dual channel-interleaved three-level buck-boost (DTLBB) structure in [1] can alternatively charge two flying capacitors, the hardware overhead is double and the quiescent current becomes high.",

author = "Lin, {Yen An} and Li, {Si Yi} and Huang, {Zheng Lun} and Huang, {Chong Sin} and Liang, {Chin Hsiang} and Chang, {Kai Syun} and Chung, {Kai Cheng} and Chen, {Ke Horng} and Lin, {Ying Hsi} and Lin, {Shian Ru} and Tsai, {Tsung Yen}",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.; null ; Conference date: 13-02-2021 Through 22-02-2021",

year = "2021",

month = feb,

day = "13",

doi = "10.1109/ISSCC42613.2021.9365797",

language = "English",

series = "Digest of Technical Papers - IEEE International Solid-State Circuits Conference",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "272--274",

booktitle = "2021 IEEE International Solid-State Circuits Conference, ISSCC 2021 - Digest of Technical Papers",

address = "United States",

}