A Functional Circuits Design of Variable Frequency Switching type DC-DC Converter Integrated Circuit

Title & Authors
A Functional Circuits Design of Variable Frequency Switching type DC-DC Converter Integrated Circuit
Lee, Jun-sung;

Abstract
This paper describes functional circuits of DC-DC converter IC incorporated with variable frequency PFM technique. In case of output voltage of DC-DC converter is reached setting value or output current is low then PFM switching frequency is slow down. In this work a PFM signal generator, a PFM Frequency Control Circuit, an output voltage detector and an over current protection circuits are designed. This device has been designed at a $\small{0.35[{\mu}m]}$, double poly, double metal 12[V] CMOS process.
Keywords
Variable PFM;DC-DC converter;Variable Frequency Oscillator;
Language
Korean
Cited by
References
1.
B. Sahu and G. A. Ricon-Mora, "An Accurate, Low-Voltage, CMOS Switching Power Supply With Adaptive On-Time Pulse-Frequency Modulation (PFM) Control," IEEE Trans. Circuit and Systems, vol. 54, no. 2, Feb. 2007.

2.
ongyong Jeong, Hyunseok Nam, Jeongjin Roh. "A 94% Efficiency Current-mode DC-DC boost converter with automatic PFM/PWM conversion" Conference on The Institute of Electronics Engineers of Korea, Vol. 31, No. 1, 2008.

3.
Chang-Jae Yoo, Hong-Jin Kim, Young-Jun Park, Kang-Yoon Lee "A Design of PFM/PWM Dual Mode Feedback Based LLC Resonant ConverterController IC for LED BLU" Conference on The Institute of Electronics Engineers of Korea, Vol. 37, No. 1, 2014.

4.
Seunghyeong Lee, Sangwoo Han, and Jongsun Kim "High Efficiency Triple Mode Boost DC-DC Converter Using Pulse-Width Modulation" Journal of The Institute of Electronics Engineers of Korea, Vol. 52, No. 2, 2015. 2

5.
Jun-sung Lee "A Design of Integrated Circuit for High Efficiency current mode boost DC-DC converter" Journal of The Institute of Electronics Engineers of Korea, Vol. 47, IE, no. 2, pp. 13-20, 2010. 6

6.
Jiman Kim, Yongsu Park, and Hanjung Song "PFM-Mode Boost DC-DC Convertor for Mobile Multimedia Application" Journal of The Institute of Electronics Engineers of Korea, Vol. 47, IE, no. 3, 2010. 9

7.
Phillip E. Allen, Douglas R. Holberg "CMOS Analog Circuit Design," Holt, Rinehart and Winstone, 1987.