The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents a tri-mode non-inverting buck-boost DC-DC converter with segmented power devices, power transmission gate structure and dead-time control to improve the power conversion efficiency and the overall size. The proposed DC-DC converter accepts an input voltage, Vin from 2.7V to 5V and produces an output, Vout ranging from 1V to 6V. A peak power conversion efficiency of 94% is observed...
This work presents a power management IC used to mitigate the effects of mismatch in Concentrating-Photovoltaic (CPV) systems. The IC contains a bi-directional dc-dc converter, an auxiliary boost converter to generate the internal 10 V power supply, as well as protection and monitoring circuits. The main power converter, with a maximum current rating of 1.5 A, is designed to equalize the voltage between...
In this paper, we present a novel compact DC-DC converter IC in which normally-off GaN-GITs (Gate Injection Transistors) and gate drivers are integrated into one chip. The DC-DC converter IC can achieve higher efficiency and smaller chip size by reducing parasitic inductances between switching power devices and gate drivers. The gate driver, having a DCFL (Direct Coupled FET Logic) with a buffer amplifier...
Large supply bouncing due to the fast switching current and parasitic inductance of the supply rail may cause reliability and electromagnetic interference (EMI) problems, especially for ICs with the pulse-width modulation (PWM) technique, such as switching DC-DC converters. In this paper, a new slew-rate controlled (SRC) output stage is proposed to appropriately increase the rise and fall times of...
DC-DC converters are employed in various electrical devices, thus forming main sources of electromagnetic interference (EMI). By making the DC-DC converter operating in chaos, using a new nonlinear feedback controller, the simulation results illustrate that a reduction of spectral peak and consequent spreading of the spectrum can be shown. This simple strategy not only improves the electromagnetic...
Performance evaluation of low-voltage silicon and GaN power FETs is presented for chip-scale DC-DC power converter applications. The circuit calculations are based on an improved circuit model for the FET with accurate description of terminal capacitances and on-resistance. It is shown that GaN power FETs combined with silicon MOS power diodes can potentially lead to nearly 82% power conversion efficiency...
DC/DC conversion has been an integral part of the power delivery chain in energy harvesting systems because the conventionally targeted synchronous computation load demands stable Vdd, which cannot in general be supplied by power harvesters directly. However, asynchronous computation loads, in addition to their potential power-saving capabilities, can be made tolerant to a much wider range of Vdd...
A single-inductor four-switch non-inverting buck-boost dc-dc converter was designed. Compared to other conventional buck-boost typologies, the presented converter reduces the number of external passive components and chip/PCB area. The chip was implemented by using the TSMC 0.35um 3.3V/5V 2P4M polycide CMOS process. The input voltage range of the presented converter covers the full output voltage...
Power continuity is maintained to critical loads in shipboard DC distribution systems by diode auctioneering the outputs of DC/DC power converters fed from separate main DC buses. In order to minimize the size/weight of power conversion non-isolated three-level buck converters are used to convert voltage from a higher main bus voltage level (typically 1000VDC) to lower ship load DC voltages (i.e....
This paper presents a bi-directional converter using improved delta modulation (IDM), it has a simple structure, a minimum number of components. The non-isolated buck-boost DC / DC converter use IDM controller can achieve zero voltage switching (ZVS) and fast response. In light load condition, it will limit the switching frequency, reduce switching loss of the converter. finally, the operation principle...
In this paper, a design of current-mode control switching regulator was presented with loop gain analysis. The analysis was verified by the chip implementation and measurement. A current mirror based current sensor was used to sensing the inductor current information. This chip has been fabricated with a TSMC 2P4M 0.35μm polyside CMOS process. The measurement result verify the buck converter with...
In this paper, a novel active clamp Flyback-Forward converter is proposed for large voltage gain and high power applications. The interleaved configuration on the primary side is employed to handle the large input current. An improved voltage doubler configuration is adopted on the secondary side to make the output diodes sustain only half of the high output voltage. Furthermore, the output diode...
This paper deals with simulation and implementation of the soft switched self driven synchronous rectified push-pull converter. External driven implementation of synchronous rectification is considered. This converter has advantages like reduced switching losses, stresses and EMI. The 48V DC is efficiently reduced to 12V DC using a DC to DC converter at 20 KHz switching. Input DC is converted into...
In this paper, a simple method to obtain the frequency response of a switching DC/DC converter is proposed. The Bode plot is obtained from a single simulation in the time domain using the switching model of the power converter, and injecting a multisine perturbation. The procedure to generate the perturbation, simulate the converter and post-process the response is explained. It is applied to several...
In this paper, a three-port bidirectional dc-dc converter is proposed for grid-interactive photovoltaic (PV) system application. The three-phase topology is suitable for residential power requirement. The control of battery and PV are naturally decoupled. In addition, the port interface with PV is current type which can implement maximum power point tracking (MPPT) and soft switching under wide variation...
This paper presents the design of simple but powerful soft switching scheme for a DC-DC Boost Converter with a closed loop control. A new novel soft switching scheme is proposed with a single switch and minimum components which offers load independent operations. Here only one switch is used in this converter which is switched ON at zero current and switched OFF at zero voltage. The proposed Controller...
With the increase of switching frequency, dissipation of switching device became one of the most important factors which constrained the efficiency of DC-DC converter. A phase-shifted full-bridge circuit which based on the phase-shifted quasi-resonant converter was introduced in this paper. We developed a switching power supply prototype for 1000W. Some specific circuits, waveforms from the saber...
This paper presents a novel digital control algorithm to enhance the dynamic performance of a dc-dc converter for non-high-frequency arc (NHFA) plasma cutting power supply. Using the principle of capacitor charge balance, the proposed algorithm predicts the optimal transient for a dc-dc converter during a load change. A 16kW experimental prototype of the NHFA plasma cutting power supply is designed...
A novel single-switch three-level (TL) converter is proposed for dimmable LED lighting. Compared with standard TL converters, the proposed topology not only maintains the advantage of using a lower voltage rating power switch that is rated half the input voltage, but also eliminates one active switch and its associated driving circuit. Moreover, it can naturally solve the voltage stress imbalance...
This paper presents a look-up table based digital control approach to on-line efficiency optimization over wide ranges of operating conditions. The proposed digital controller allows programmable modes of operation based on off-line efficiency characterization and optimization. Applied to a flyback dc-dc converter, the controller adopts valley switching in discontinuous conduction mode (DCM), which...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.