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LED driver integrates PFC, step-down AC/DC

Posted: 12 Jul 2010     Print Version  Bookmark and Share

Keywords:NCL30001  LED driver  PFC  AC/DC  power conversion 

An offline LED driver from ON Semiconductor integrates power-factor correction (PFC) and isolated step-down AC-DC power conversion in a single stage. By eliminating the need for a dedicated PFC boost stage, the NCL30001 offers a reduced component count, lower cost solution that supports higher overall system efficiency in LED power supplies for applications such as LED-based street, low bay, wall packs and architectural lighting.

Suitable for designs with power requirements of between 40W and 150W, the NCL30001 is designed to operate in continuous conduction mode, and can be configured as either a constant-current or fixed-output voltage driver. With an adjustable operating frequency of 20kHz to 250kHz and a multi-function latch-off pin able to implement an over-temperature shutdown circuit, the SOIC-16 packaged controller offers circuit designers a high degree of flexibility.

Further features of the NCL30001 controller's specification include a high voltage start-up circuit, voltage feedforward to improve loop response, a brownout detector, internal overload timer, latch input and a high-accuracy multiplier to reduce input line harmonics. An isolated single-stage PFC LED driver evaluation board is available for this device that is intended for applications ranging from 40W to 100W that require a direct constant current output, The current is adjustable from 0.7A to 1.5A to support a wider range of high-power, high-brightness LEDs.

"With growth in the popularity and the rapidly increasing number of LED-based lighting designs on the market, the need for highly efficient, cost-effective, integrated system management devices is greater than ever," said Christophe Warin, AC/DC business unit manager, ON Semi. "The NCL30001 meets these requirements in full, and provides engineers with a flexible single-stage topology LED driver ideal for use in their new LED lighting products."

The NCL30001 is available in a 16-lead SOIC package and priced at Rs.49.03 ($1.05) per unit in 10,000-unit quantities.

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