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LED lamp driver promises TRIAC dimming down to 1%

02 Dec 2014

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Diodes Inc. has introduced a LED lamp driver that claims to optimise the design of sub-12W TRIAC dimmer-compatible LED lamps with a dimming range of 1-100 per cent and up to 30 per cent reduction in BOM. The AP1695 is a single-stage driver integrating a 500V high-voltage MOSFET into the space-saving SO-7 package.

For 120V and 230V mains-dimmable retrofit LED lamps, such as the common 5W GU10 and 8W energy-saver bulbs, the high-performance AP1695 uses a patented constant on-time control technique to enable deep TRIAC dimming down to one per cent and an increase in lamp/triac compatibility, noted the company. Its dimming curve complies with the NEMA SSL6 standard and the driver is fully-compliant with the requirements of the IEC6100-3-2 harmonic standard.


This device uses PFM technology to tightly regulate output current up to a 230mA (max), while maintaining a power factor higher than 0.9 and a THD rating less than 30 per cent. Its boundary-conduction mode ensures higher efficiency and enhanced EMI performance.

By operating on the primary side, the device removes the need for optocouplers, secondary-side control and loop-compensation circuitry without compromising application stability. The AL1695 also has the following integrated protection features: over-voltage, short-circuit and over-temperature protection.

The device is supported by data sheet, application and design notes and an evaluation board (ref. AP1695EV1).

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