Switched mode power supply driver integrated with a power transmission antenna
First Claim
Patent Images
1. A driver comprising:
- a switched mode power supply adapted to be electrically coupled to a load (Rload) and provide power supply to the load (Rload), wherein said switched mode power supply comprises an existing coil, wherein said existing coil is a power inductor of the switched mode power supply which power inductor has an active powering duration and a passive freewheeling duration so as to provide power supply to the load (Rload),the driver circuit further comprises;
a first power transmission antenna formed as a first coil which is coupled to the existing coil of the switched mode power supply,said first power transmission antenna is adapted for being magnetically coupled to a second power receiving antenna external to said driver and different from the load (Rload), thereby forming a wireless power transmitter, andwherein a jumper is placed in parallel with the first power transmission antenna and used for short circuiting the first power transmission antenna, when a power transmission from said first power transmission antenna is not required.
1 Assignment
0 Petitions
Accused Products
Abstract
A driver comprising a switched mode power supply, wherein said switched mode power supply comprises an existing coil, the driver circuit further comprises: a first power transmission antenna (42) formed as a first coil which is either the existing coil of the switched mode power supply or coupled to the existing coil of the switched mode power supply, said first power transmission antenna (42) is adapted for being magnetically coupled to a second power receiving antenna (44) thereby forming a wireless power transmitter.
25 Citations
15 Claims
-
1. A driver comprising:
-
a switched mode power supply adapted to be electrically coupled to a load (Rload) and provide power supply to the load (Rload), wherein said switched mode power supply comprises an existing coil, wherein said existing coil is a power inductor of the switched mode power supply which power inductor has an active powering duration and a passive freewheeling duration so as to provide power supply to the load (Rload), the driver circuit further comprises; a first power transmission antenna formed as a first coil which is coupled to the existing coil of the switched mode power supply, said first power transmission antenna is adapted for being magnetically coupled to a second power receiving antenna external to said driver and different from the load (Rload), thereby forming a wireless power transmitter, and wherein a jumper is placed in parallel with the first power transmission antenna and used for short circuiting the first power transmission antenna, when a power transmission from said first power transmission antenna is not required. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A driver comprising:
-
a switched mode power supply adapted to be electrically coupled to a load (Rload) and provide power supply to the load (Rload), wherein said switched mode power supply comprises an existing coil, wherein said existing coil is a power inductor of the switched mode power supply which power inductor has an active powering duration and a passive freewheeling duration so as to provide power supply to the load (Rload), wherein the driver circuit includes, a first power transmission antenna formed as a first coil which is either the existing coil of the switched mode power supply or coupled to the existing coil of the switched mode power supply, said first power transmission antenna is adapted for being magnetically coupled to a second power receiving antenna external to said driver and different from the load (Rload), thereby forming a wireless power transmitter, wherein the switched mode power supply comprises a flyback converter including a transformer which has a primary side winding and a secondary side winding, wherein said secondary side winding is electrically connected to the load (Rload), wherein the first coil of the first power transmission antenna coupled to an output terminal of a flyback converter, wherein said flyback converter includes a freewheel loop coupled across the primary side winding, said freewheel loop is adapted to freewheel the energy in the primary side winding, a resistor in parallel with said capacitor and said first coil and a switch adapted to selectively switch either of the first coil or the resistor into the freewheel loop, and the first coil of the first power transmission antenna is in the freewheel loop.
-
Specification