A Novel Buck Converter with Dual Loops Control Mechanism

Abstract

This paper presents a novel buck converter with dual-loop control technology, which does not need to detect the inductor current directly. The structure of the control loops is easy to implement, one loop controls the output voltage, and the other controls the switching frequency. With the dual loops control mechanism, the output voltage and switching frequency can be accurately controlled only by measuring the output and input voltage, without sensing the inductor current. The buck converter can generate an output voltage of 1.0–2.5 V when the input voltage and load current are 3.0–3.6 V and 100–500 mA, respectively. The design was verified by SIMPLIS. The simulation results show that the switching frequency variation is less than 1% at the output voltage of 1.0–2.5 V. The recovery time is less than 1.5 μs during the load change. The circuit can be fabricated by using the TSMC 0.35μm 2P4M CMOS processes. The control scheme, theoretical analysis and circuit implementation are presented in this paper.

Enhanced power supply circuitry with long duration and high‐efficiency charging for indoor photovoltaic energy harvesting internet of things end device

“…We conducted tests on four distinct power supply circuits for IoT end devices, all powered by a 10‐µF capacitor with a voltage of 4.5 V. The IoT end node works from 2.2 to 2 V. These circuits were designed using PSpice and simulated. The first circuit, BUCK [23], served as the baseline to compare the extended operational times of the other three circuits. The BUCK circuit emulates the output behaviour of a typical EM chip, which generally incorporates a buck converter.…”

“…A buck converter [23] is a DC‐to‐DC converter designed to convert the input voltage and produce a lower output voltage. It is known for its efficiency, simplicity in design, and widespread use in various applications such as power supplies, battery chargers, and motor controllers.…”

Design of the Buck Converter without Inductor Current Sensor

“…In contrast to the current contactless sensor, sensor-less solutions are more popular and are proposed in [16][17][18][19][20][21][22][23][24][25][26][27]. In Figure 2, the sensing method is straightforward [16,17].…”

“…Perhaps, the hardware may be further saved. Similarly, [23] pro the dual loops mechanism buck converter, which uses the input/output voltages erate TON, instead of the current sensor. In Figure 7, the virtual inductor current circuit [21] is proposed to improve the drawback of [19][20][21].…”

Simple formula for designing the PID controller of a DC-DC buck converter

“…A DC-DC converter is an electronic circuit that converts a DC voltage source from one DC voltage level to another DC voltage level. DC-DC converters are widely used in many electronic industrial applications because they have high efficiency and can provide adjustable voltage output [1]− [4]. The DC-DC converters are often used as dc motor drives [5], [6].…”