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A High-Voltage-Compliant Current-to-Digital Sensor for DC?DC Converters in Standard CMOS Technology.
- Source :
- IEEE Transactions on Power Electronics; Mar2017, Vol. 32 Issue 3, p2180-2188, 9p
- Publication Year :
- 2017
-
Abstract
- Efficient current, voltage, and power sensing are critical blocks for power management, switching regulators, maximum power point tracking (MPPT) circuit, and motor control. This paper presents a standard CMOS and low-power current-to-digital converter (IDC) that senses the current flowing at high-voltage nodes. The proposed sensor uses a CMOS-switched capacitor circuit to sense a dc–dc converter output current and gives digital output without an analog-to-digital converter (ADC), or the need for high-voltage technologies. Compared to the resistor-based current-sensing methods that require current-to-voltage circuit, gain block, and an ADC converter, the proposed sensor is a low-power integrated circuit that achieves high resolution, lower complexity, and lower power consumption. The IDC circuit is fabricated on a 5 V, 0.7 μm, and three metal CMOS technology and occupied less than 10% area (1 mm2 area) compared to other sensors. It consumes 18 mW that is less than 40% power consumed by other sensors, and its current measurement error is below 0.4%. The proposed IDC circuit has been characterized as standalone and with a boost dc–dc regulator and MPPT for photovoltaic systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 32
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 120289195
- Full Text :
- https://doi.org/10.1109/TPEL.2016.2562108