14W high efficiency LED driver power supply circuit design for high ambient temperature applications

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Summary:

A typical 20 V, 14 W constant voltage (CV), constant current (CV) output power supply circuit. The amount of light output from the LED array is proportional to the amount of current flowing through it. Therefore, the LED driver should have a constant current output instead of a constant voltage output. In this design, the DC output is not isolated from the AC input, so the LED array and housing should be safely isolated from the user.

design feature

• High working temperature (75 oC)
• Extremely energy efficient
• Meets EU CoC/CEC 2008/Energy Star 2.0 requirements
• The load mode is highly efficient (up to 86%, required to be 79.6%)
• No-load input power < 250 mW at 265 VAC input, 300mW required
• Hysteresis thermal shutdown protection
• Load disconnect protection
• Meets EN55015B conducted EMI limits, EMI margin > 8 dBμV

14W high efficiency LED driver power supply circuit diagram for high ambient temperature applications

See the uploading documentation for details (click to download)