LED driver IC allows CC control to detect operation mode
PCIM 2014: With a high, universal input range to suit consumer and enterprise use around the globe, the LYTSwitch-2 LED driver IC from Power Integrations is based around a monolithic silicon transistor, operating at 725V. The IC delivers up to 12W of controlled output power and reduces component count to just 23, for smaller, more reliable LED lighting design.
Primary-side control is used, together with driver isolation, allowing the LEDs to be affixed directly to a metal heatsink, removing the need – and expense – of an electrically isolating enclosure. Constant-current output tolerance across temperature s ±3% at both low-line and high-line voltages, exceeding the ±5%, to meet requirements such as the Energy Star minimum-lumens-delivered specification, for example. Typical efficiency is up to 90%.
Protecting the LED load from surges in line voltage increases the lifetime of the bulb, even when subjected to frequent peaks. The constant-current and constant-voltage control maintains a voltage on the output of the driver during no-load operation, preventing damage to the output filter or shutting down the driver when being tested or installed with no LED string connected.
Over-temperature, over-current and open feedback-loop protection are provided. Devices are packaged in SO-8 (surface mount), MSOP and eSIP (vertical) package options.
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