Linear Technology offers LED controllers suitable for off-line applications
Linear Technology
LT3799 LED controller
The LT3799 isolated LED controller from Linear Technology is designed for driving LEDs within a wide range of applications, including those off-line, and can be used with standard TRIAC in-wall dimmers.
LT3799 controllers can function without the need for an octo-coupler and feature active power factor correction (PFC) and a thermally enhanced MSOP-16E package.
The level of PFC they provide meets Department of Energy requirements and complies with the IEC 61000-3-2 Class C Lighting Equipment Harmonics requirement.
The LT3799EMSE is offered in a 16-pin MSOP package and prices begin at $2.25 each in 1,000‑piece quantities. An extended temperature version, the LT3799IMSE, is available from $2.59 per in 1,000‑piece quantities.
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Key specifications
- Drives LEDs within a universal input range of 90–265VAC
- Suitable for applications requiring 4–100W of power
- 86 per cent efficient
- Regulated LED current with an accuracy of ±5 per cent
- Provides active PFC of up to 0.977
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