Implementation and Design of Voltage-Mode PWM Control CMOS Boost Power Converter with Protection Circuits

摘要

A lower power consumption, smaller output ripple and better regulation boost power converter controlled by voltage feedback and pulse-width modulation (PWM) mode is implemented in this paper. The over-current protection and soft-start circuit can produce a slowly rising output voltage without extra clock or any external component to prevent inrush current and output voltage overshoot during the start-up period of the converter. The converter is designed and simulated using the TSMC 0.35pm 2P4M CMOS Process. Hspice simulation results show that, the boost converter having 1.3 × 1.3mm~2 chip size with power efficiency about 85%. This chip can operate with input supply voltage from 2.7V to 3.W, and its output voltage can stable at 5.0K and less than 16mV ripple voltage at maximum loading current 167mA. The simulation shows the circuit has about 1.0ms of soft-start time and can inhibit the inrush current when the power on.