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Dynamic stability of a closed-loop gate driver enabling digitally controlled slope shaping

  • A concept for a slope shaping gate driver IC is proposed, used to establish control over the slew rates of current and voltage during the turn-on and turn off switching transients. It combines the high speed and linearity of a fully-integrated closed-loop analog gate driver, which is able to perform real-time regulation, with the advantages of digital control, like flexibility and parameter independency, operating in a predictive cycle-bycycle regulation. In this work, the analog gate drive integrated circuit is partitioned into functional blocks and modeled in the small-signal domain, which also includes the non-linearity of parameters. An analytical stability analysis has been performed in order to ensure full functionality of the system controlling a modern generation IGBT and a superjunction MOSFET. Major parameters of influence, such as gate resistor and summing node capacitance, are investigated to achieve stable control. The large-signal behavior, investigated by simulations of a transistor level design, verifies the correct operation of the circuit. Hence, the gate driver can be designed for robust operation.

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Metadaten
Author of HS ReutlingenGröger, Johannes; Wicht, Bernhard
DOI:https://doi.org/10.1109/PRIME.2017.7974107
ISBN:978-1-5090-6508-0
Erschienen in:PRIME 2017 : 13th Conference on PH.D. Research in Microelectronics and Eletronics : conference proceedings : 12th-15th June 2017, Giardini Naxos, Taormina, Italy
Publisher:IEEE
Place of publication:Piscataway, NJ
Editor:Salvatore Pennisi
Document Type:Conference Proceeding
Language:English
Year of Publication:2017
Page Number:4
First Page:61
Last Page:64
DDC classes:620 Ingenieurwissenschaften und Maschinenbau
Open Access?:Nein
Licence (German):License Logo  Lizenzbedingungen IEEE