• Title, Summary, Keyword: Prevention Circuit (RDPC)

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A Wide Frequency Range LLC Resonant Controller IC with a Phase-Domain Resonance Deviation Prevention Circuit for LED Backlight Units

  • Park, YoungJun;Kim, Hongjin;Chun, Joo-Young;Lee, JooYoung;Pu, YoungGun;Lee, Kang-Yoon
    • Journal of Power Electronics
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    • v.15 no.4
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    • pp.861-875
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    • 2015
  • This paper presents a wide frequency range LLC resonant controller IC for LED backlight units. In this paper a new phase-domain resonance deviation prevention circuit (RDPC), which covers a wide frequency and input voltage range, is proposed. In addition, a wide range gate clock generator and an automatic dead time generator are proposed. The chip is fabricated using 0.35 μm BCD technology. The die size is 2 x 2 mm2. The frequency of the clock generator ranges from 38 kHz to 400 kHz, and the dead time ranges from 300 ns to 2 μs. The current consumption of the LLC resonant controller IC is 4 mA for a 100 kHz operation frequency using a supply voltage of 15 V.