Date of Publication
Master of Science in Electronics and Communications Engineering
Other Computer Engineering
Gokongwei College of Engineering
Electronics And Communications Engg
Roderick Y. Yap
Defense Panel Chair
Defense Panel Member
Ann E. Dulay
The consumer market is increasing its demand for battery-operated portable devices. Due to the high voltage needs of certain circuits, power management circuits such as DC-DC converters have become a huge necessity to regulate the low voltages coming from batteries. One of the DC-DC converters come in the form of pulse width modulation schemes to boost up the voltage from the battery. This research designs a PWM boost converter controller that is capable to work at low voltages (1.2V). The design is based on 0.35um process technology, which is characterized to work at a power supply of 3.0V. Although the process technology is designed at 3.0V, the design works around these limitations to work at 1.2V. The PWM controller also uses a timing driven comparator to limit the complexity behind using feedback operational amplifiers. The PWM controller is capable of driving a white LED at 1.2V and can provide the necessary power to supply 2 series white LEDs at the minimum input voltage of 2.7V. Its efficiency is tagged at 86.12% for a single diode and 85.12% for a dual diode configuration. The controller is also able to provide regulation for resistive devices with efficiency of up to 93.82%. The layout of the controller is designed so that it can be compatible with smaller process technologies and requires little or no change to enable the design on these other process technologies.
Archives, The Learning Commons, 12F Henry Sy Sr. Hall
143 leaves ; 28 cm.
PWM power converters; CMOS; Pulse frequency modulation
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Cabrera, A. R. (2010). Design and implementation of a CMOS based low voltage PWM boost converter for driving white LED. Retrieved from https://animorepository.dlsu.edu.ph/etd_masteral/3842