G3ZKO.com

LLC Converter

Used for:

Medium power high efficiency

Pros:

• High efficiency with resonant conversion - zero voltage switching for MOSFETs, zero current switching for output diodes
• 50% duty cycle gate drives
• No output inductor
• Low EMI
• Switch voltage limited to Vout + spike

HR1000 LLC Controller

ST LLC Design Guide AN054

Zetex LLC with Synchronous Rectification

LLCs in EVs

ST LLC App Note AN2644

IR LLC App Note AN-1160

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Cons:

• Requires extra inductor or controlled transformer leakage inductance
• One high side drives
• Variable frequency
• Complex analysis
• Overload and short circuit protection difficult