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Applications of halogen converter control IC

  • US 7,521,878 B2
  • Filed: 08/01/2007
  • Issued: 04/21/2009
  • Est. Priority Date: 04/08/2004
  • Status: Active Grant
First Claim
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1. A power supply circuit for powering a load, comprising:

  • a half-bridge comprising a pair of high-side and low-side switching devices arranged in series between a high-side supply circuit and a common return circuit;

    a connection point between said switching devices providing a switched output for powering said load;

    an integrated circuit, including a high-side driver and a low-side driver for respectively providing drive signals to control terminals of said high- and low-side switching devices, said high- and low-side drivers being controlled by an oscillator and timing and logic elements in the integrated circuit; and

    a protective circuit which responds to high dv/dt at the switched output by delivering a voltage peak to a current sense terminal of said IC;

    wherein the protective circuit comprises a capacitor and a resistor connected in series to said switched output, and a diode with its cathode connected to a node of said capacitor and resistor, and its anode connected to said current sense terminal.

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