Feedback controlled coil driver for inductive power transfer
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United States of America Patent
Stats
-
Aug 8, 2017
Grant Date -
Jun 18, 2015
app pub date -
Feb 25, 2015
filing date -
Aug 31, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fully integrated feedback controlled coil driver is disclosed for inductive power transfer to electronic devices. For efficient power transfer, a voltage across a switch that switchably couples the coil between a DC input power source and ground is sampled and compared with a preselected reference voltage to generate an error voltage. The error voltage is integrated over time and compared to a voltage ramp. The value of the integrated error voltage relative to the voltage ramp is used to obtain an optimal on time for the switch such that coil current is maximized for a given DC input power. The coil driver can also provide ASK modulation on the coil current by changing the size of the switch according to input data.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2015 Application Filing Year
- H02J Class
- 4445 Applications Filed
- 3538 Patents Issued To-Date
- 79.60 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 19 Citation Count
- H02J Class
- 84.35 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 8, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 8, 2029 |
