New LED-driver design for 100 W A19 incandescent bulbs

The reference design – 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 utilises the very low-profile LNK460VG from the LinkSwitch(tm)-PL family of ICs from Power Integrations.

DER-322 fits inside the A19 form factor, is EN61000-3-2 C (D) compliant and passes THD limits. With a PF above 0.95, it is suitable for commercial as well as consumer applications. With PFC and CC conversion combined into a single switching stage, the design has a very low component count, which enables miniaturization, lowers cost and increases reliability. It also eliminates short-lived electrolytic input bulk capacitors.

Commenting Andrew Smith, product marketing manager at Power Integrations said, “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.”

Suitable for an A19 incandescent bulb replacement-driver but also reconfigurable as a T8 tube replacement driver, DER-322 is of interest to designers of both high-end LED lighting and those working on cost optimisation of bulbs for retail sale. The reference design may be easily modified to support TRIAC dimming.

Power Integrations

Check Also

Pulsiv signs strategic pan-European distribution agreement with WPG EMEA to further expand demand creation activities

 Pulsiv Limited, the Cambridge (UK) innovator of power electronics technology, has signed a pan-European distribution agreement …