Volltext-Downloads (blau) und Frontdoor-Views (grau)
The search result changed since you submitted your search request. Documents might be displayed in a different sort order.
  • search hit 6 of 62
Back to Result List

Bootstrap circuit with high-voltage charge storing for area efficient gate drivers in power management systems

  • Bootstrap circuits are mainly used for supplying a gate driver circuit to provide the gate overdrive voltage for a high-side NMOS transistor. The required charge has to be provided by a bootstrap capacitor which is often too large for integration if an acceptable voltage dip at the capacitor has to be guaranteed. Three options of an area efficient bootstrap circuit for a high side driver with an output stage of two NMOS transistors are proposed. The key idea is that the main bootstrap capacitor is supported by a second bootstrap capacitor, which is charged to a higher voltage and connected when the gate driver turns on. A high voltage swing at the second capacitor leads to a high charge allocation. Both bootstrap capacitors require up to 70% less area compared to a conventional bootstrap circuit. This enables compact power management systems with fewer discrete components and smaller die size. A calculation guideline for optimum bootstrap capacitor sizing is given. The circuit was manufactured in a 180nm high-voltage BiCMOS technology as part of a high-voltage gate driver. Measurements confirm the benefit of high-voltage charge storing. The fully integrated bootstrap circuit including two stacked 75.8pF and 18.9pF capacitors results in a voltage dip lower than 1V. This matches well with the theory of the calculation guideline.

Download full text files

  • 421.pdf
    eng

Export metadata

Additional Services

Share in Twitter Search Google Scholar

Statistics

frontdoor_oas
Metadaten
Author of HS ReutlingenSeidel, Achim; Wicht, Bernhard
DOI:https://doi.org/10.1109/ESSCIRC.2014.6942046
ISBN:978-1-4799-5694-4
Erschienen in:ESSCIRC 2014 - 40th European Solid State Circuits Conference : Venice, Italy, 22 - 26 September 2014
Publisher:IEEE
Place of publication:Piscataway, NJ
Editor:Pietro Andreani, Andrea Bevilacqua, Gaudenzio Meneghesso
Document Type:Conference Proceeding
Language:English
Year of Publication:2014
Tag:bootstrap circuits; driver circuits
Page Number:4
First Page:159
Last Page:162
DDC classes:621 Angewandte Physik
Open Access?:Nein
Licence (German):License Logo  Lizenzbedingungen IEEE