Inverting Buck-Boost DCDC Converter Design Challenges

Inverting Buck-Boost DCDC Converter Design Challenges

Karim El khadiri and Hassan Qjidaa SidiMouhamed Ben Abdellah University, Morocco

ABSTRACT

This paper presents an inverting buck-boost DCDC converter design. A negative supply voltage is needed in a variety of applications, but only a few DCDC converters are available on the market. OLED, a new display type especially suited for small digital camera or mobile phone displays. Design challenges that came up when negative voltages have to be handled on chip will be discussed, such as continuous/discontinuous mode transition problems, negative voltage feedback and negative over-voltage protection. Both devices operate in a fixed frequency PWM mode or alternatively in PFM mode. The single inductor topology is called inverting buck-boost converter or simply inverter. The proposed converter has been implemented with a TSMC 0.13-um 2P4M CMOS process, and the chip area is 325 x 300 um2.

KEYWORDS Buck–boost converter ,DCM / CCM detection, Negative supply voltage. Original Source URL: http://airccse.org/journal/ijesa/papers/4114ijesa01.pdf http://airccse.org/journal/ijesa/current2014.html

Project-Based Microcontroller System Laboratory Using BK300 Development Board With PIC16F887 Chip

Project-Based Microcontroller System Laboratory Using BK300 Development Board With PIC16F887 Chip

Lukman A.Ajao1, Olayemi M.Olaniyi2, Jonathan G.Kolo2, Abdulazeez O.Ajao2 1Federal University of Technology, Nigeria 2Federal Polytechnic, Nigeria

ABSTRACT

Microcontroller system is one of the vital subjects offered by students during the sequence of study in universities and other colleges of science, engineering and technology in the world. In this paper, we solve the problem of student comprehension and skill development in embedded system design using microcontroller chip PIC16F887 by demonstration of hands-on laboratory experiments. Also, developments of software code, circuit diagram simulation were carried out. This is to help students connect their theoretical knowledge with the practical experience. Each of the experiments was carried out using BK300 development board, PICKit3 programmer, Proteus 8.0 software. Our years of experience in the teaching of microcontroller course and the active involvement of students as manifested in complete indepth hands-on laboratory projects on real life problem solving. Laboratory session with the development board and software demonstrated in this article is unambiguous. Future embedded system laboratory session could be designed around ATMel lines of Microcontrollers

KEYWORDS Microcontroller, Embedded system, Hands-on lab experiments, simulation, and PICKit3 programmer Original Source URL: http://airccse.org/journal/ijesa/papers/5315ijesa02.pdf http://airccse.org/journal/ijesa/current2015.html