Banca de QUALIFICAÇÃO: RODRIGO PEDROSO MENDES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE: RODRIGO PEDROSO MENDES
DATA: 30/01/2024
HORA: 14:00
LOCAL: https://meet.google.com/xiy-dtuu-iug
TÍTULO: Integrated digital control of step-down switched-inductor DC-DC converters for portable battery powered applications in CMOS 180 nm
PALAVRAS-CHAVES: DC-DC, digital control, inductive, step-down, digital pulse width modulation (DPWM), window analog to digital converter (ADC)
RESUMO: This work presents a digital control for fixed frequency step-down switched-inductor DC-DC converter in the context of Power Management Integrated Circuits (PMIC) for portable battery-powered applications. Restrictions in the current consumption and total die area of this type of application make the design of the Analog to Digital Converter (ADC) and the Digital to Pulse Width Modulation (DPWM) difficult. Therefore, this work suggests a window ADC and a variable gain DPWM with a combined typical current consumption of 60 μA. The ADC requires a 48 MHz clock in order to operate at 2 MSPS with 20 levels. The DPWM operates at 2 MHz with a typical line regulation of 10 mV/V and step size of 16mV. Both ADC and DPWM were designed in CMOS 180 nm (schematic level only) and co-simulated with the verilog model of a digital Proportional Integral Derivative (PID). It is assumed that the DC-DC can be supplied either with a Lithium-Ion battery (2.7 V to 4.2 V) or, during charge, with a USB port (4.7 V to 5.5 V), the load current can vary from 0 to 200 mA, the switching frequency is 2MHz, and the output voltage corresponds to the operating range of the native transistor available in the CMOS 180 nm technology (1.62 V to 1.98 V).
MEMBROS DA BANCA:
Externo ao Programa - 1725390 - ANTONIO AUGUSTO LISBOA DE SOUZA
Presidente - 2333186 - CICERO DA ROCHA SOUTO
Interno - 1558977 - DARLAN ALEXANDRIA FERNANDES
Externo à Instituição - FERNANDO RANGEL DE SOUSA