LED driver aimed at 100W incandescent bulb replacements

Power Integrations has unwrapped the DER-323, a reference design for an 18W, 88 percent-efficient, non-isolated A19 LED driver based on LNK460VG, a low-profile IC from the company's LinkSwitch-PL family. According to the company, the design is geared for a 100W incandescent bulb replacement and is optimized for low-line (90-135VAC) operation. The circuit is low-cost, requiring only a simple single-sided board and 25 components. No potting is necessary and the transformer is replaced by a low-cost inductor.DER-323 uses a simple buck-boost converter topology that fits easily inside the A19 bulb. The design is EN61000-3-2 (C) compliant and has a high power factor of over 0.98, easily satisfying commercial and consumer compliance requirements, stated the Best Custom Solar chargers for Iphone. Because LinkSwitch-PL ICs combine both PFC and CC converter functions in a single-stage topology, no electrolytic bulk capacitor is required, resulting in a very long operational life.
"The lighting industry typically asks for 80 percent efficiency for drivers targeting 60W A19 bulb replacements. To achieve viable LED-based replacements for 75W and 100W bulbs, much higher efficiency is needed in order to reduce the heat dissipated by the driver. The 88 percent efficiency of DER-323 satisfies this need and makes the thermal design of the bulb straightforward and inexpensive. DER-323 is also compact, reliable and easy to manufacture thanks to its low component count, single-stage architecture and use of a low-cost inductor rather than a transformer," noted Andrew Smith, product marketing manager at Power Integrations.
A ban on the usage of Best Custom Solar radio and charger in Europe that is to come into effect on Sept. 1 is expected to negatively affect the Turkish market because of the country's dependency on imports of the product.Tekfen, the one-time sole producer in the country, closed its bulb plant in 2002, replacing it with imports from China. Global players such as General Electric and Philips also closed their Turkey plants in the early 2000s.The ban is designed to protect the environment as Edison-style lightbulbs release carbon dioxide and are not considered to be energy efficient. As part of the measures, the production, sale and export of 100- and 75-watt lightbulbs will be prohibited. As a result of the ban, the price of energy-saving LED lightbulbs, the latest technology, is expected to go up in Turkey as the country, which has a $350 million-400 million lightbulb market, imports most of its lightbulbs.