Power Integrations has launched an 18W non-isolated A19 LED driver with 88%-efficient.

It’s designed for a 100W incandescent bulb replacement and will support low-line (90 VAC to 135 VAC) operation.

According to Andrew Smith, product marketing manager at Power Integrations, "The lighting industry typically asks for 80% 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% efficiency of DER-323 makes the thermal design of the bulb straightforward and inexpensive."

The circuit will fit on a single-sided board and 25 components. No potting is necessary and the transformer is replaced by a low-cost inductor.

Designated the DER-323, the reference design uses a buck-boost converter topology that fits inside the A19 bulb.

The design is EN61000-3-2 (C) compliant and has a high power factor of over 0.98.

Based on a LNK460VG LinkSwitch-PL IC it combines both PFC and CC converter functions in a single-stage topology, no electrolytic bulk capacitor is required, resulting in a very long operational life.