Adaptive current-threshold detector for an adaptive on-time Buck converter at light load

Lai, Xiaojun; Zhong, Longjie

doi:10.1007/s10470-018-1140-6

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…In the main circuit, the switching transistor Q is relocated to the lower branch, eliminating the necessity for a floating-ground drive circuit. This simplifies the voltage measurement of the switching tubes in the drive circuitry [6][7][8] . The control circuit compares the feedback voltage, out V obtained through an operational amplifier circuit, with the reference voltage ref V generating an error term e. This deviation e undergoes processing through the PID control algorithm and subsequently passes through the microcontroller's built-in PWM peripheral, resulting in a pulse control signal.…”

Section: Voltage Stabilization Circuit Designmentioning

confidence: 99%

Design method of microcontroller-based intelligent accounting device assisted power supply study

Li,

Chen,

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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To meet the input voltage requirement of onboard chips in intelligent accounting devices, Utilizing the STM32 series microcontroller as the central control unit, a novel integrated Buck circuit voltage regulator applying PID control has been developed, where voltage monitoring and temperature detection are included. To simplify the driving circuit, we shift the switching of the Buck circuit; the use of operational amplifier circuits for voltage sampling and scaling, and the subsequent voltage tracking, makes the feedback signal more stable and not be disturbed. Designed interrupt program for microcontroller based on PID control algorithm, and programs to handle feedback voltage and PID control are included. The finalized voltage stabilization circuit design successfully achieves reliable voltage output, over-temperature shutdown circuitry, and alarm functionality.

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Section: Voltage Stabilization Circuit Designmentioning

confidence: 99%

Design method of microcontroller-based intelligent accounting device assisted power supply study

Li,

Chen,

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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A high performance adaptive on-time controlled valley-current-mode DC–DC buck converter

et al. 2020

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This paper presents an AOT-controlled (adaptive-on-time, AOT) valley-current-mode buck converter for portable application. The buck converter with synchronous rectifier not only uses valley-current-mode control but also possesses hybrid-mode control functions at the same time. Due to the presence of the zero-current detection circuit, the converter can switch freely between the two operating modes without the need for an external mode selection circuit, which further reduces the design difficulty and chip area. The converter for the application of high power efficiency and wide current range is used to generate the voltage of 0.6–3.0 V with a battery source of 3.3–5.0 V, while the load current range is 0.05–2 A. The circuit can work in continuous conduction mode with constant frequency in high load current range. In addition, a stable output voltage can be obtained with small voltage ripple. In pace with the load current decreases to a critical value, the converter transforms into the discontinuous conduction mode smoothly. As the switching period increases, the switching loss decreases, which can significantly improve the conversion efficiency. The proposed AOT controlled valley current mode buck converter is integrated with standard 0.18 μm process and the simulation results show that the converter provides well-loaded regulations with power efficiency over 95%. When the circuit switches between the two conduction modes drastically, the response time can be controlled within 30 μs. The undershoot voltage is controlled within 25 mV under a large current hopping range.

show abstract

Adaptive current-threshold detector for an adaptive on-time Buck converter at light load

Cited by 2 publications

References 8 publications

Design method of microcontroller-based intelligent accounting device assisted power supply study

Design method of microcontroller-based intelligent accounting device assisted power supply study

A high performance adaptive on-time controlled valley-current-mode DC–DC buck converter

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