Power Integrations of San Jose, California USA, announced an LED-driver reference design for high-power LED bulb replacement. According tot the company, the driver can deliver the power required for a 100 W incandescent bulb replacement in an A19 form factor – an industry first. DER-322 describes a non-isolated, 93% efficient, high-power-factor (PF) LED driver designed to drive a nominal LED string voltage of 78 V at 230 mA from an input voltage range of 195 VAC to 265 VAC (47 Hz – 63 Hz). The LED driver utilizes the very low-profile LNK460VG from the LinkSwitch-PL family of ICs from Power Integrations.
The company notes that DER-322 fits neatly inside the A19 form factor, is EN61000-3-2 C (D) compliant and easily passes THD limits. It has a PF above 0.95, that therefore suits commercial as well as consumer applications. The DER-322 has PFC and CC conversion combined into a single switching stage, giving it a very low component count. Power Integrations asserts that this enables miniaturization, lowers cost, and increases reliability, and also eliminates short-lived electrolytic input bulk capacitors.
Comments Andrew Smith, product marketing manager at Power Integrations: “With an 8-10% efficiency advantage over older solutions, DER-322 provides a compelling option for lighting engineers working toward the landmark achievement of a commercially viable A19-sized replacement for the 100 W incandescent bulb. With LED efficacies continuing to improve, this important milestone will soon be within reach. In the meantime, the LinkSwitch-PL family of ICs easily enables production of cost-effective replacements for 60 W and 75 W bulbs.”
The driver is suitable for an A19 incandescent bulb replacement-driver and is reconfigurable as a T8 tube replacement driver. The company says it is of interest to designers of both high-end LED lighting and those working on cost optimization of bulbs for retail sale. Power Integrations says that the reference design may be easily modified to support TRIAC dimming. The engineering report for DER-322 is freely downloadable from Power Integrations website at http://www.powerint.com/sites/default/files/PDFFiles/der322.pdf