Mobile Phone Charger Design Using Telephone Line Based On Bang-Bang Control Of Buck Converter

Azman, Mohamad Al-Bukhari (2016) Mobile Phone Charger Design Using Telephone Line Based On Bang-Bang Control Of Buck Converter. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Mobile Phone Charger Design Using Telephone Line Based On Bang-Bang Control Of Buck Converter.pdf - Submitted Version Download (469kB)

Abstract

Charging mobile phone during an event of utility power supply loss would be troublesome since the charger of the phone is not functioning in such situation. Beside power bank, the alternative power source available is from telephone line. However, the voltage from telephone line is quite high and not suitable for mobile phone charging. Hence, the voltage needs to be step down by appropriate means, i.e. buck converter. The voltage of telephone line also is inconsistent since different voltage is required for calling, standby and ringing mode. Therefore closed-loop control of step-down circuit needs to be designed to provide constant voltage for mobile phone charging. Bang-bang control technique is chosen as a closed-loop control since it is easy to design and also robust to disturbances and parameter uncertainties. Buck converter will step down voltage from telephone line and bang-bang controller will regulate the voltage to desired voltage of 5V for charging voltage. At the end of this project, the developed device is able to charge mobile phone by using power from telephone line and also able to provide constant charging voltage through designed closed-loop control.

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