Skip to main content
padlock icon - secure page this page is secure

Open Access 4-Switch Buck-Boost DC–DC Converter: A Case Study

Download Article:
(PDF 22,584.1 kb)
The need for DC–DC non-inverting Buck-Boost converters is ever growing to supply tiny systems, i. e., a regulated input voltage at 3.3 V while the battery voltage can vary widely from 4.2 V down to about 2 V. Efficient power management solutions are required to extend the battery life before recharging, to successfully address line and load transients and to be cost attractive. The use of a ripple-based control loop is advocated to meet stringent dynamic performances. However, this kind of control loop is more complex to analyze and the converter still subject to bifurcations. Stable operations whatever the operating conditions, are mandatory but not straightforward to assess. Literature covers abundantly to the authors' knowledge the stability analyses of Buck converters or Boost converters but not the Buck-Boost mode. The Buck-Boost mode's stability issues are pointed out with their consequences in terms of generated Electro-Magnetic Interferences through the study of a monolithic 4-Switch Buck-Boost converter (only the L-C output filter and some of the controller's capacitors are out-of-chip). An improvement to the Sampled-Data Modeling approach for stability analysis is proposed to enable the designer to adjust adequately controller's parameters and comprehensively verify the circuit stability other than by performing repeated transient simulations. The results of this augmented method are confronted to experimental measurements on the one hand and simulation at transistor-level of the full converter on the other hand.

27 References.

No Supplementary Data.
No Article Media
No Metrics


Document Type: Miscellaneous

Publication date: December 1, 2018

More about this publication?
  • The electronic systems that can operate with very low power are of great technological interest. The growing research activity in the field of low power electronics requires a forum for rapid dissemination of important results: Journal of Low Power Electronics (JOLPE) is that international forum which offers scientists and engineers timely, peer-reviewed research in this field.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more