Flyback transformer wire attach method to printed circuit board
AssigneeCardiac Pacemakers, Inc.
InventorsTom Iverson, Bart Carey, Robert S. Harguth
Life of this patent
Estimating the term…
Abstract
A method of forming a surface mount transformer. The method comprises winding insulated wire around a magnetic core to form at least one secondary transformer coil, winding insulated wire around the magnetic core to form at least one primary transformer coil, attaching wire ends of the at least one primary coil to at least first and second vias of a printed circuit board (PCB), attaching wire ends of the at least one secondary coil to at least third and fourth vias of the PCB, affixing the coils and the magnetic core to the first side of the PCB, and attaching the coil wire ends flush to a surface of the vias on the second side of the PCB.
Claims20
A voltage generator for use in an implantable medical device (IMD) comprising:
- a power source, the power source having output terminals;
- a lead-less transformer package, including a primary coil and a secondary coil wound around a core and including wire ends attached to bonding pads of a printed circuit of the lead-less package, the lead-less package adapted for electrical contact to a main circuit board of the IMD;
- a switch connected in series with the primary coil between the positive and negative terminals of the power source, the switch receiving an input signal to open and close the switch;
- a diode connected in series with the secondary coil across the terminals of a load, the load comprising a capacitive storage element connected to leads adaptable for connection to a heart;
- a sense circuit monitoring the voltage at the load, the sense circuit having an output signal which is a first signal when the output voltage of the voltage generator is below a selected threshold voltage and a second signal when the output voltage of the power supply is above or equal to the selected threshold voltage;
- and
- a controller, receiving the output signal of the sense circuit and transmitting the input signal to the switch to open and close the switch, wherein the controller closes the switch to provide power to the load when receiving the second signal and opens the switch when receiving the first signal.
A method comprising:
- providing a voltage generator circuit topology on a main circuit board of an implantable medical device (IMD), the topology including a transformer;
- and
- surface mounting a lead-less transformer package on the main circuit board of the IMD, the lead-less transformer package including the transformer attached to bonding pads of a printed circuit board of the lead-less package, the lead-less package adapted for electrical contact to a main circuit board of the IMD.
Dependencies are inferred from the claim text.