A 300mA 14mV-ripple digitally controlled buck converter using frequency domain &amp;#x0394;&amp;#x03A3; ADC and hybrid PWM generator

Ahmad, H.; Bakkaloglu, Bertan

doi:10.1109/isscc.2010.5433985

Cited by 20 publications

(9 citation statements)

References 2 publications

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“…With this design, all off-chip components which are used for control purpose are fully integrated on-chip in order to reduce PCB area and cost of the converter. The proposed controller is even smaller than the digital controller implemented in a 0.18 CMOS process [17]. Another very small (0.1 ) digital controller was implemented using a 40 nm CMOS process [18], and after consideration of the differences in the processes, the size of the proposed controller is comparable to it.…”

Section: Resultsmentioning

confidence: 98%

A 0.791 mm$^{2}$ On-Chip Self-Aligned Comparator Controller for Boost DC-DC Converter Using Switching Noise Robust Charge-Pump

Kong

Hong

Cho

2014

IEEE J. Solid-State Circuits

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Herein we propose a new PWM controller for a DC-DC converter with a Self-aligned Comparator Control (SCC), the purpose of which is to overcome sub-harmonic switching and hysteretic characteristics that are problematic in conventional comparator control schemes. In the proposed scheme, the condition of the output voltage is converted to the form of a phase difference through the SCC block. The main control loop of the converter regulates the inductor current which is built up to an optimum value by using this phase difference. In addition to the SCC, the proposed PWM controller is fully integrated on-chip without off-chip components to decrease the size and cost of the DC-DC converter using a new Switching Noise Robust Charge-pump (SNRC). A boost DC-DC converter with the proposed SCC and SNRC was designed and fabricated ina commercial 0.35 m BCDMOS process with total controller area of 0.791 mm 2 . A maximum efficiency of 90% was achieved at a total output power of 480 mW with a switching frequency of 926 kHz when the input and the output voltages were 3.7 V and 8 V, respectively. Over 85% efficiency was maintained over a wide range of output load current from 40 mA to 300 mA.

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Section: Resultsmentioning

confidence: 98%

A 0.791 mm$^{2}$ On-Chip Self-Aligned Comparator Controller for Boost DC-DC Converter Using Switching Noise Robust Charge-Pump

Kong

Hong

Cho

2014

IEEE J. Solid-State Circuits

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“…The controller size has decreased by 58.4% vis-à-vis that of the ZOC [2] due to the removal of the freewheeling switch and the reduction of the operating current; in this process, everything is fully integrated on-chip in order to eliminate all off-chip components. The proposed controller is even smaller than the digital controller implemented in a 0.18µm CMOS process [3].…”

Section: Measurement Resultsmentioning

confidence: 99%

“…In this paper, we suggest fully onchip self-error-correction controller based on ZOC which doesn't need additional local shunt loop and eliminates all of cumbersome off-chip components as well as freewheeling switch. As a result, fully on-chip controller for boost DC-DC converter which is now comparable or even smaller than the digital controller in size [3,4] each switching cycle. This main operation principle is same as ZOC [2], however, there was one problem in the operation of the ZOC [2] and a new control scheme is adopted to provide a solution in the proposed controller as follows.…”

Section: Introductionmentioning

confidence: 99%

A 0.791mm<sup>2</sup> fully on-chip controller with self-error-correction for boost DC-DC converter based on Zero-Order Control

Kong

Hong

Lee

et al. 2012

Proceedings of the IEEE 2012 Custom Integrated Circuits Conference

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This paper introduces an on-chip controller without offchip components to reduce controller size for use as a ZeroOrder-Control converter (ZOC). DC offset error by adding sawtooth signal in ZOC is self-corrected using a new control scheme, so as to overcome weak point of ZOC. This controller is applicable to both buck and boost, but a boost converter is chosen for verification here. A 0.35µm BCD process is used for chip with controller area of 0.791mm 2 . An efficiency of 90% is obtained for an 8 V output from 3.7 V at 480mW with 926 KHz.

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“…The existing analogue-controlled SMPS bears the distinctive limitations of additional cost and time for development due to its complicated design and limited scope of application [4,5]. Especially, its filter circuit to secure loop bandwidth serves as the major cause of limiting the scope of application [6,7].…”

Section: Introductionmentioning

confidence: 99%

Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network

Ko¹,

Park²,

Kim³

2015

Journal of Electrical Engineering and Technology

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-This paper proposes a multiple switch mode power supply (SMPS) system based on the wireless network which controls variable load. The system enables power supply of up to 600W using 200W SMPS as a unit module and provides a controlling function of output power based on variable load and a monitoring function based on wireless network. The controlling function for output power measures the variation of output power and facilitates efficient power supply by controlling output power based on the measured variation value. The monitoring function guarantees a stable power supply by observing the multiple SMPS system in real time via wireless network. The performance of the proposed system was examined by various experiments. In addition, it was verified through standardized test of Korea Testing Certification. The results were given and discussed.

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A 300mA 14mV-ripple digitally controlled buck converter using frequency domain ΔΣ ADC and hybrid PWM generator

Cited by 20 publications

References 2 publications

A 0.791 mm$^{2}$ On-Chip Self-Aligned Comparator Controller for Boost DC-DC Converter Using Switching Noise Robust Charge-Pump

A 0.791 mm$^{2}$ On-Chip Self-Aligned Comparator Controller for Boost DC-DC Converter Using Switching Noise Robust Charge-Pump

A 0.791mm<sup>2</sup> fully on-chip controller with self-error-correction for boost DC-DC converter based on Zero-Order Control

Development of a Multiple SMPS System Controlling Variable Load Based on Wireless Network

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