An Integrated Ramp Generator for PWM Voltage Regulators

Xiao Zong Huang; Lun Cai Liu; Wen Gang Huang; Jun Luo; Dong Mei Zhu

doi:10.4028/www.scientific.net/AMM.644-650.3682

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 644-650An Integrated Ramp Generator for PWM Voltage...

An Integrated Ramp Generator for PWM Voltage Regulators

Abstract:

An integrated ramp generator is presented in this paper. For traditional implementations, the amplitude clamp is realized with zener diode to limit the output voltage to ±V_Z, while the zener diode is not available for standard CMOS process. The transmission gate is utilized to make the output voltage in the determined range. The reference voltage is provided by a bandgap voltage reference with temperature compensation, which guarantees the temperature stabilization of the frequency of the ramp generator. The ramp generator was fabricated in a commercial CMOS process. The frequency of 44kHz is achieved under the power supply of 3.5V, and the frequency variation of 41kH to 46kHz with the power supply of 3.3V to 5V.

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Periodical:

Applied Mechanics and Materials (Volumes 644-650)

Pages:

3682-3685

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.644-650.3682

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Online since:

September 2014

Authors:

Xiao Zong Huang*, Lun Cai Liu, Wen Gang Huang, Jun Luo, Dong Mei Zhu

Keywords:

Bandgap Reference, Ramp Generator, Zener Diode

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References

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