Time‐multiplexed hysteretic control for single‐inductor dual‐input single‐output DC‐DC power converter

Summary Single‐inductor multi‐input single‐output (SI‐MISO) switching DC‐DC power converter architecture is a cost effective solution to applications where multiple input sources are required to be managed with a limited space and cost. This paper presents a new time‐multiplexed hysteretic control (...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2022-04, Vol.50 (4), p.1235-1249
Main Authors: Alam, Muhammad, Lu, Dylan D.‐C., Siwakoti, Yam P.
Format: Article
Language:English
Subjects:
Analog circuits
analog control
Circuits
continuous conduction mode (CCM)
DC/DC converter
dual‐input single‐output converter
Hysteresis
Multiplexing
Power converters
Ripples
Switching
Topology
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Summary:Summary Single‐inductor multi‐input single‐output (SI‐MISO) switching DC‐DC power converter architecture is a cost effective solution to applications where multiple input sources are required to be managed with a limited space and cost. This paper presents a new time‐multiplexed hysteretic control (TMHC) scheme for SI‐DISO topology to decouple the power sharing among two input sources. Unlike previously reported solutions with discontinuous conduction or pseudo‐continuous conduction operation of the inductor, this paper focuses on how to keep the inductor current in a continuous conduction mode (CCM) and proposed a control scheme with considerably lower ripple current with fast transition time upon switching and higher efficiency. The mathematical proof using the expressions of inductor ripple current, comparison between efficiency and transition time from one level to other, is derived. Additionally, a low‐cost analog circuitry has been implemented to incorporate the proposed control scheme. Experimental results from the hardware prototype are given to verify the proposed control scheme. This paper presents a new time‐multiplexed hysteretic control (TMHC) scheme for SI‐DISO topology to decouple the power‐sharing among two input sources in continuous conduction mode (CCM). The mathematical proof using the expressions of inductor ripple current, comparison between efficiency and transition time from one level to other, is derived. Additionally, a low‐cost analog circuitry has been implemented to incorporate the proposed control scheme.
ISSN:0098-9886
1097-007X
DOI:10.1002/cta.3199