200W 92% Efficient Low THD 10% Dimmable AC/DC LED Driver Reference Design With Adjustable Output

1 января 2018

This reference design is a 200-W, dimmable, low THD AC/DC LED power supply with a tunable output voltage from 100 to 200 V. It is designed for use in outdoor lighting applications such as street lighting, road lighting, and so on. This design uses a CCM PFC as front end to achieve low THD and high power factor and proposes two-switch flyback architecture as second stage which helps to meet the cost, efficiency , and design simplicity aspects of LED power supply with adjustable output voltage.

Особенности

Supports universal input AC range of 85- to 305-V and very low standby power of <350 mW at 230V High efficiency close to 90% at 120-V AC and close to 92% at 230-V, 265-V AC for 196-W load with no external cooling required Power factor > 0.98 and THD < 5% at 120-V, 230-V and 265-V AC for 196-W load <10% dimming capability over 0- to 10-V analog dimming range Adjustable DC output operation from 100 to 200 V enabling to support different LED loads without much effect on performance Meets current THD regulations as per IEC 61000- 3-2, class C for ≥ 22% of 196 V and ≥ 36% of 102-V LED load