High‐efficiency series–parallel form hybrid envelope‐tracking power supply based on the optimised power losses. Issue 14 (1st July 2019)

• Record Type: Journal Article
• Authors: Pan, Yong; He, Songbai; Tang, Xiaobin
• Is Part Of: Electronics letters. Volume 55:Issue 14(2019)
• Page Start: 810
• Page End: 813
• Publication Date: 2019-07-01
• Subjects: power amplifiers -- power supplies to apparatus -- Long Term Evolution -- power convertors -- integrated circuit design -- DC‐DC power convertors -- electric current control -- switching convertors; one buck converter -- equivalent average current slew rate matching theory -- accurate power loss model -- multilevel converter -- 10‐MHz LTE envelope signal -- 67.6 W maximum output power -- high‐efficiency series–parallel form hybrid envelope‐tracking power supply -- optimised power losses -- high efficiency -- optimised method -- series–parallel form hybrid envelope tracking power supply -- hysteresis current control -- SPF hybrid power modulator -- switched‐mode converters -- power 26.9 W -- power 67.6 W; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2019.1246
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : To achieve high efficiency, an optimised method of the series–parallel form (SPF) hybrid envelope tracking power supply based on hysteresis current control is proposed in this Letter. The SPF hybrid power modulator is constituted by one linear regulator and two switched‐mode converters which include one multilevel converter and one buck converter. Based upon the equivalent average current slew rate matching theory and accurate power loss model analysed in this Letter, the voltage distribution of the multilevel converter is optimised. For verification, a prototype is fabricated aiming for tracking the 10‐MHz LTE envelope signal with the efficiency of 83%, 26.9 W average output power, and 67.6 W maximum output power.