Abstract
Integrated and efficient maximum power point tracking (MPPT) is a critical need in the photo-voltaic power generation system. One of the key components of the MPPT is current and power sensor. This paper presents a low-power integrated current sensor implemented in standard low-voltage CMOS technology. The proposed current sensor is a current-to-digital converter circuit, removing the need for an additional analog-to-digital converter for current digitization. The proposed PV MPPT circuit measures the current information from the DC-DC converter output ripple by charging and discharging a set of capacitive nodes, resulting in a digital current measurement for the MPPT circuit. The MPPT circuit along with the integrated circuit is presented. The current sensor is fabricated in a 0.7 micron CMOS technology and covers less than 4 mm2 of silicon area. The sensor power consumption is less than 27 mW, and provides an 8-bits digital representation of the converter load current with less than 0.4% error.
Original language | English (US) |
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Title of host publication | Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 654-657 |
Number of pages | 4 |
Volume | 2015-May |
Edition | May |
DOIs | |
State | Published - May 8 2015 |
Event | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 - Charlotte, United States Duration: Mar 15 2015 → Mar 19 2015 |
Other
Other | 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015 |
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Country | United States |
City | Charlotte |
Period | 3/15/15 → 3/19/15 |
Keywords
- Current sensor
- Data converter
- DC-DC converter
- MPPT
- PV
ASJC Scopus subject areas
- Electrical and Electronic Engineering