PI Design for 15W Downlight is Flicker-Free

Power Integrations has a reference design for an 85%-efficient, 15W PAR38 downlight driver that it claims will deliver flicker-free dimming without the use of electrolytic bulk capacitors.

Based around the firm’s LNK405EG LED driver IC, it is designed to provide flicker-free performance across a broad range of triac dimmers.

Typical TRIAC dimmers were designed for incandescent lights that use an order of magnitude more power than LED lights of equivalent lumen output.

According to the supplier, the low current requirement of LED lights, especially when dimmed, can cause triacs to switch off unexpectedly or oscillate, creating an annoying flickering effect.

This can be addressed by storing energy in an electrolytic bulk capacitor, with bulb lifetime implications, or by allowing a continuous flow of current into the bulb, wasting energy and thereby defeating the main benefit of LED lighting.

The DER-281 reference design provides an alternative approach without the need for electrolytic bulk capacitors.

Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<
Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.
Display devices have been used for many years as a means of HMI (Human Machine Interface) to connect humans and machines interactively, and their usage are still expanding. Automotive interiors are no exception to this trend, with an increasing ... READ MORE
About LiDAR Automotive industry trends In recent years, many vehicles have been launched with ADAS (Advanced Driver Assistance Systems) as standard equipment. As the future evolves towards more automated driving, sensing around the vehicle i... READ MORE