A Practical Switching Loss Model for Buck Voltage Regulators

In this paper, a review of switching loss mechanisms for synchronous buck voltage regulators (VRs) is presented. Following the review, a new simple and accurate analytical switching loss model is proposed for synchronous buck VRs. The model includes the impact of common source inductance and switch...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics 2009-03, Vol.24 (3), p.700-713
Main Authors: Eberle, W., Zhiliang Zhang, Yan-Fei Liu, Sen, P.C.
Format: Article
Language:English
Subjects:
Analytical models
Applied sciences
Approximation
Circuit properties
Computer simulation
Connection and protection apparatus
DC-DC power conversion
Electric currents
Electric potential
Electric power
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electronic circuits
Electronics
Equations
Exact sciences and technology
Inductance
Integrated circuit modeling
Mathematical analysis
Mathematical models
modeling
MOSFETs
Piecewise linear approximation
Regulators
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
Simulation
Spices
Surge protectors
Switches
Switching
Switching loss
Switching, multiplexing, switched capacity circuits
Synchronous
Transistors
Virtual reality
Voltage
Voltage regulators
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, a review of switching loss mechanisms for synchronous buck voltage regulators (VRs) is presented. Following the review, a new simple and accurate analytical switching loss model is proposed for synchronous buck VRs. The model includes the impact of common source inductance and switch parasitic inductances on switching loss. The proposed model uses simple equations to calculate the rise and fall times and piecewise linear approximations of the high-side MOSFET voltage and current waveforms to allow quick and accurate calculation of switching loss in a synchronous buck VR. A simulation program with integrated circuit emphasis (Spice) simulations are used to demonstrate the accuracy of the voltage source driver model operating in a 1-MHz synchronous buck VR at 12-V input, 1.3-V output. Switching loss was estimated with the proposed model and compared to Spice measurements. Experimental results are presented to demonstrate the accuracy of the proposed model.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2008.2007845