A series of design ideas to help designers of LED driver circuitry benefit from the company’s recently introduced LinkSwitch-II family of AC-DC power conversion ICs has been announced by the leader in high-voltage integrated circuits for energy-efficient power conversion, Power Integrations. The new design ideas (DI-184, DI-185 and DI-186), demonstrate that LinkSwitch-II ICs are well suited for power supplies and ballasts driving high-brightness LEDs. LED ballasts that are simpler to design, lower-cost, and more durable than existing converter technology are enabled by the devices’ highly accurate constant-current performance and low external component count.
Utilizing a transformer winding to sense the output current rather than relying on lossy, expensive secondary-side components to provide feedback and regulate the output, LinkSwitch-II features Power Integrations’ advanced primary-side regulation (PSR) technology. Resulting in simpler, more reliable and lower-cost designs with extremely good active and standby energy-efficiency performance, this cuts system component count by up to 30 percent.
Maintaining output current within a +/- 10% range even if load voltage drop, magnetic component tolerance and temperature conditions vary during manufacture or operation, Power Integrations’ PSR technology ensures highly accurate performance. The constant-current drive enabled by LinkSwitch-II ensures that each LED in a series-connected string provides similar light output. This eliminates the current-sharing problem inherent with parallel-connected diodes, and reduces LED binning costs and optical mixing complexity in lighting fixtures.
LED arrays powered by LinkSwitch-II, unlike many halogen and CFL lights, work with traditional AC-based triac dimmers, as well as more modern remote-controlled dimmers. The high standby efficiency of LinkSwitch-II is particularly important with remote dimming; when it is turned off, LinkSwitch-II absorbs only 30 mW of standby power while waiting to re-energize the lights.
All LinkSwitch-II family members are produced in halogen-free, RoHS-compliant packaging.
The provider of intelligent entrance control and outdoor security solutions, Smarter Security Systems, announced today the availability of the new Fastlane Door Detective. The new Door Detective, in response to the market's changing needs, is now easier to install, has expanded access control functionality, and adds further security features.
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