Smart controller with phantom inductor current sensing for switched mode power supplies
Voltage on the output terminal of an inductor is obtained as a first input signal to a control block (CB); the inductor has an input terminal connected to a power switch and driver block at a switching node. A sense input voltage is obtained on an output terminal of a sensing circuit that is not directly connected to the switching node, as a second input signal to the CB. A voltage is generated on a first output terminal of the CB and is selected such that the CB can use its first and second input signals to infer the current through the inductor. A pulse width modulation (PWM) signal is generated on a second output terminal of the CB, based on the inferred current through the inductor; the second output signal from the CB is provided to a PWM input terminal of the power switch and driver block.
- Research Organization:
- International Business Machines Corp., Armonk, NY (United States)
- Sponsoring Organization:
- USDOE
- Assignee:
- International Business Machines Corporation (Armonk, NY)
- Patent Number(s):
- 11,150,712
- Application Number:
- 16/399,981
- OSTI ID:
- 1859975
- Country of Publication:
- United States
- Language:
- English
Development of chipless, wireless current sensor system based on giant magnetoimpedance magnetic sensor and surface acoustic wave transponder
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journal | February 2018 |
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