Products, Materials & Tools | Mar 23, 2016

Diodes Announces New Triac-Dimmable LED Driver with Excellent Dimmer Compatibility

Diodes Inc's new AL1697 LED driver targets line-powered, triac-dimmable LED lighting applications. This device provides compatibility with leading‑ and trailing‑edge triac dimmers using a single-stage, high power-factor dimming circuit that complies with the NEMA SSL-6 dimming curve, delivering optimal line and load regulation. This integrated MOSFET eliminates the need for an auxiliary winding, which lowers BOM cost and enables a smaller PCB, making this an attractive and competitive solution for driving LED lamps up to 15W.

The AL1697 is a high-precision, high-efficiency, buck-boost LED driver whose topology provides an accurate output current that enables exceptional line and load regulation. This design supports non-isolated (buck-boost) operation to address the isolation requirements for different lamps. Operating in boundary-conduction mode achieves higher conversion efficiency while also reducing switching noise and eases EMI design. The device features a low, 130μA startup current and a low operating current of 170μA.

The MOSFET options provide a drain-source, on-resistance specification of 4Ω for operation up to 2A at 600V, or a super-junction RDS(ON) of 1.8Ω that can support 4A at 650V. The AL1697 offers standard internal protection features, such as output short-circuit, over-temperature, under-voltage lockout, leading-edge blanking and cycle-by-cycle over-current protection. The device also features over-voltage/output-open and thermal foldback protection for enhanced safety and reliability.

In quantities up to 10k, unit pricing for the two MOSFET options of the AL1697 in the small outline SO-7 package is as follows:
AL1697-20CS7-13 (2A/600V) … $0.29 USD
AL1697-40DS7-13 (4A/650V) … $0.36 USD

Further information is available from

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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