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Voltage step down type DC-DC converter having a coupled inductor

  • US 6,429,628 B2
  • Filed: 02/05/2001
  • Issued: 08/06/2002
  • Est. Priority Date: 02/07/2000
  • Status: Expired due to Fees
First Claim
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1. A DC-DC buck converter comprising:

  • a DC power supply, a main switch coupled to the DC power supply, a free-wheel inductor having first and second coils, one end of each of the coils being connected to a common junction, the other end of the first coil coupled to the main switch, wherein the free-wheel inductor includes an intermediate tap coupling the common junction to a free-wheel switch to provide that, when the free-wheel switch is ON, a free-wheeling current flows through said intermediate tap into the inductor, and wherein said free-wheel switch is an FET.

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