Pulse width modulation

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A Ten-Level Series-Capacitor 24-to-1-V DC–DC Converter With Fast In Situ Efficiency Tracking, Power-FET Code Roaming, and Switch Node Power Rail
A Ten-Level Series-Capacitor 24-to-1-V DC–DC Converter With Fast In Situ Efficiency Tracking, Power-FET Code Roaming, and Switch Node Power Rail 150 150
Author(s): Zhaoqing Wang, Mao Li, Suhwan Kim, Nachiket Desai, Ram K. Krishnamurthy, Xin Zhang, Mingoo Seok

Abstract:

This work presents a high-efficiency ten-level series-capacitor 24-to-1-V buck converter with three techniques to improve its efficiency and reliability. First, we propose a fast in situ efficiency tracking (FIT) technique to maximize efficiency across load conditions and process, voltage, and temperature (PVT) variations. The second technique is the power-FET …

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1 – 13
Year of Publication: 2024
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2024.3385662
Publisher: IEEE

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Design and Stability Analysis of the Variable-Sawtooth-Based PWM Controller for the AC-Coupled Envelope Tracking Supply Modulator
Design and Stability Analysis of the Variable-Sawtooth-Based PWM Controller for the AC-Coupled Envelope Tracking Supply Modulator 150 150
Author(s): Peng Xu, Tao Wang, Xueli Zhang, Peng Cao, Jiawei Xu, Zhiliang Hong

Abstract:

This letter analyzes the proposed variable-sawtooth-based PWM controller for the ac-coupled envelope tracking (ET) supply modulator (SM). The ET SM includes a linear amplifier and a switching power modulator (SPM). The SPM maintains the voltage across the ac-coupling capacitor and provides an output current in a power-efficient manner. A 10-MHz …

Published in: IEEE Solid-State Circuits Letters
Page(s): 151 – 154
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3384345
Publisher: IEEE

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