Products, Materials & Tools | Aug 02, 2016

Diodes' New Dimmable LED Controllers for up to 150W with High PF

The AL1663 and AL1663R single-stage dimmable LED controllers introduced by Diodes Incorporated support flyback and buck-boost topologies to provide primary-side regulation that achieves an accurate constant-current output without requiring opto-couplers and secondary control circuitry. Operating at up to 150 W and featuring multiple dimming options, these controllers provide versatile and cost-effective drivers for LED backlighting, smart LED lighting and general-purpose dimmable LED lamps.

High efficiency and low EMI result from operation in boundary-conduction mode (BCM) with valley-switching control, which further ensures the AL1663 and AL1663R maintain high power‑factors with low total harmonic distortion under universal input-voltage conditions. The use of primary-side regulation simplifies design and lowers total BOM component count and cost. The AL1663 and AL1663R are also characterized by low start-up current and low operating current, and integrate multiple protection features including over-voltage, short-circuit, over‑current and over-temperature.

Analog and digital dimming modes are supported: The AL1663R has a single dimming pin that will accept either an analog signal between 0.3 V and 2.4 V DC or a digital PWM input when connected with a suitable input capacitor of several hundred nF. The AL1663 offers an additional digital dimming input pin that can accept a high-frequency PWM signal and provides built-in PWM-to-DC conversion.

The AL1663 and AL1663R are both offered in SO-8 packages. In quantities of 1000 units, the AL1663S-13 is priced at $0.30 each and the AL1663RS-13 is priced at $0.25 each.

Further information is available at http://www.diodes.com

About Diodes Inc.:

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.

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