Solar-Charger with PWM Controller IC for Output Voltage Regulated in Booster Structure
Date Issued
2010
Date
2010
Author(s)
Cheng, Kai-Hsu
Abstract
This thesis presents the design and implements of the Power Management Controller IC, adapted to voltage mode of the pulse width modulation with low input voltage such as solar or fuel cell in TSMC 0.35 2P4M CMOS process. This chip includes three main segments: the first partition is logic control circuit. The second partition is analog circuit which includes linternal reference voltage, over temperature protection, pulse-width modulation, sawtooth wave generation, over current protection, and start-up circuit of ultra-low input voltage. The third segment comprises 3.3V NMOS for power switches. Its technology in design adopts analog PWM method to get higher reliability in whole system.
This chip design reveals a low voltage pulse-width modulation controller with voltage mode of booster type on system level for output voltage regulated. Its minimum input start-up voltage is about 0.6V~0.7V. As for how low the input voltage is depended on the threshold voltage of transistor in this semiconductor process. The die area is 2.03 x 1.2 mm2. The system power consumption is 111.51mW and its output voltage is 4.8V.
Subjects
ultra-low start-up voltage
solar charger with PWM controller in DC-DC boost converter
low operation voltage
Type
thesis
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