Design of a Hybrid High Resolution Digital PWM for a Smart Power Point-of-Load Power Converter
Year: 2025
Type: conference-paper
Abstract: The article presents the design and the architectural optimization of a new Hybrid, High-Resolution Digital Pulse Width Modulator (HHR-DPWM) and its implementation in an integrated, digitally-controlled, voltage-mode, point-of-load (POL) buck converter for automotive applications. The pro-posed HHR-DPWM architecture, which features a synchronous counter-based DPWM, a delay locked loop (DLL)-based digital-to-time converter (DTC) with sub-clock-cycle resolution, and Dyadic Digital Pulse Modulation (DDPM) dithering, is optimized to meet the requirements of the POL converter at low cost and design effort. The POL converter with the proposed HHR-DPWM is fabricated in the 110 nm BCD9s technology by STMi-croelectronics. Based on measurements, the converter regulates the output voltage with 2 mV accuracy, 2 mV peak to peak ripple and a power efficiency up to 95.4% at 3.4 V output voltage.
Authors: Neha Dalal, Matteo Landini, Paolo Vilmercati, Francesco Musolino, Paolo Stefano Crovetti
Institutions: Politecnico di Torino, STMicroelectronics (Italy)
Language: English
Topic: Advanced DC-DC Converters
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4411724930