High energy efficiency, low cost, non-isolated 350mA/12V LED driver

This circuit features an accurate primary-side constant V and constant current controller (CV/CC), eliminating the need for an optocoupler and all secondary-side CV/CC control circuits. It achieves maximum efficiency without the need for a current sense resistor and is the only component used Small, low-cost solution (16 components) with automatic restart for output short-circuit and open-loop protection. Its full-load efficiency is greater than 80% in the entire input voltage range, and its no-load power consumption is <200mW under 265V AC input. It meets EN55015 and CISPR-22B Class EMI standards and Energy Star requirements for solid-state lighting (SSL) products.

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