A Monolithic Current-Mode CMOS DC–DC Converter With On-Chip Current-Sensing Technique

Lee, Cheung Fai; Mok, Philip K. T.

doi:10.1109/jssc.2003.820870

Cited by 449 publications

(177 citation statements)

References 15 publications

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“…There are many methods for detecting currents -the use of current sensors [13]- [14], shunt resistors [2], and current mirrors [15]. This paper suggests using a MOSFET for sensing and a shunt resistor, as shown in Fig.…”

Section: Gate Diver With Current Sensing Circuitsmentioning

confidence: 99%

Sliding Mode Observer Driver IC Integrated Gate Driver for Sensorless Speed Control of Wide Power Range of PMSMs

Oh¹,

Kim²,

Heo³

et al. 2015

ETRI J

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This work proposes a highly efficient sensorless motor driver chip for various permanent-magnet synchronous motors (PMSMs) in a wide power range. The motor driver chip is composed of two important parts. The digital part is a sensorless controller consisting mainly of an angle estimation block and a speed control block. The analog part consists of a gate driver, which is able to sense the phase current of a motor. The sensorless algorithms adapted in this paper include a sliding mode observer (SMO) method that has high robust characteristics regarding parameter variations of PMSMs. Fabricated SMO chips detect back electromotive force signals. Furthermore, motor current-sensing blocks are included with a 10-bit successive approximation analog-to-digital converter and various gain current amplifiers for proper sensorless operations. Through a fabricated SMO chip, we were able to demonstrate rated powers of 32 W, 200 W, and 1,500 W.Keywords: Wide power range of motors, sensorless speed control, sliding mode observer driver IC, integrated gate driver.

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Section: Gate Diver With Current Sensing Circuitsmentioning

confidence: 99%

Sliding Mode Observer Driver IC Integrated Gate Driver for Sensorless Speed Control of Wide Power Range of PMSMs

Oh¹,

Kim²,

Heo³

et al. 2015

ETRI J

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show abstract

“…The current transformer is neither cost-nor size-effective and can not be integrated into the controller. Another method is using a current sensing transistor in parallel with the power MOSFET [6]- [8]. This method is lossless and can be easily integrated into the controller chip.…”

Section: On-chip Current Sensing Circuitmentioning

confidence: 99%

On-chip current sensing circuit for current-limited minimum off-time PFM boost converter

Kim

Min

et al. 2009

2009 International SoC Design Conference (ISOCC)

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Abstract-An on-chip current sensing circuit for current-limited minimum off-time pulse frequency modulation (PFM) boost converter is designed and verified by SPICE simulations. The current mirror pair, power and sensing MOSFETs with size ratio of K, is used in our on-chip current sensing circuit. Very low drain voltages of the current mirror pair should be matched to give accurate current sensing, so a folded-cascode opamp with a PMOS input pair is used in our design. Simulation results show that current sensing is accurate with properly frequency compensated opamp; over-compensation results in inaccuracies in current sensing.

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“…For example, the on-resistance of the power MOSFET can be detected, and interpreted to the current level [2]. The self-learning sensing method can be used to detect the power inductor current, using a low-pass RC network, and the equivalent series impedance of the power inductor [3], and a separate sense FET can be used as an on-chip current sensor [4][5][6][7][8][9]. Among these, the on-chip current sensor with a sense FET has relatively high accuracy, and simple circuit structure; therefore, it has been popular for integrated buck regulators.…”

Section: Introductionmentioning

confidence: 99%

A Fast Response Integrated Current-Sensing Circuit for Peak-Current-Mode Buck Regulator

Ha¹,

Park²,

Kong³

et al. 2014

JSTS:Journal of Semiconductor Technology and Science

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Abstract-An on-chip current sensor with fast response time for the peak-current-mode buck regulator is proposed. The initial operating points of the peak current sensor are determined in advance by the valley current level, which is sensed by a valley current sensor. As a result, the proposed current sensor achieves a fast response time of less than 20 ns, and a sensing accuracy of over 90%. Applying the proposed current sensor, the peak-current-mode buck regulator for the mobile application is realized with an operating frequency of 2 MHz, an output voltage of 0.8 V, a maximum load current of 500 mA, and a peak efficiency of over 83%.Index Terms-Current-mode buck regulator, on-chip current-sensing circuit, fast response current sensor

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A Monolithic Current-Mode CMOS DC–DC Converter With On-Chip Current-Sensing Technique

Cited by 449 publications

References 15 publications

Sliding Mode Observer Driver IC Integrated Gate Driver for Sensorless Speed Control of Wide Power Range of PMSMs

Sliding Mode Observer Driver IC Integrated Gate Driver for Sensorless Speed Control of Wide Power Range of PMSMs

On-chip current sensing circuit for current-limited minimum off-time PFM boost converter

A Fast Response Integrated Current-Sensing Circuit for Peak-Current-Mode Buck Regulator

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