A Low Temperature Coefficient, High Voltage Detection Circuit Used in Power over Ethernet

Zhi Cheng Hu; Zhi Hua Ning; Le Nian He

doi:10.4028/www.scientific.net/AMR.588-589.839

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 588-589A Low Temperature Coefficient, High Voltage...

A Low Temperature Coefficient, High Voltage Detection Circuit Used in Power over Ethernet

Abstract:

A low temperature coefficient, high voltage detection circuit used in Power over Ethernet is proposed. This circuit realizes the detection comparison without utilizing an extra voltage reference circuit and comparator while the temperature coefficient of the threshold voltage is as low as that of a regular bandgap reference. The proposed detection circuit is implemented in CSMC 0.5μm 60V BCD process, Cadence Spectre simulation results show that the temperature coefficient of the threshold voltage is 66.5 ppm/°C over the temperature range of -40°C to 125°C, and the maximum variation of the threshold voltage is 2.7% under all corners.

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Periodical:

Advanced Materials Research (Volumes 588-589)

Pages:

839-842

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.588-589.839

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Online since:

November 2012

Authors:

Zhi Cheng Hu, Zhi Hua Ning, Le Nian He

Keywords:

BCD Process, Comparator, Detection, Power over Ethernet, Temperature Coefficient

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References

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