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A Wide Frequency Range LLC Resonant Controller IC with a Phase-Domain Resonance Deviation Prevention Circuit for LED Backlight Units
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  • Journal title : Journal of Power Electronics
  • Volume 15, Issue 4,  2015, pp.861-875
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2015.15.4.861
 Title & Authors
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;
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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.
Backlight unit;Clock generator;Dead time;LED driver;LLC resonant controller;Prevention Circuit (RDPC);Resonance Deviation;Wide range;
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A Digital Self-Sustained Phase Shift Modulation Control Strategy for Full-Bridge LLC Resonant Converters,;;;;;

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