13 July 2016Power Electronics / Power Management
Opto-Electronics
Power Integrations announced its LYTSwitch-1 single-stage, non-isolated buck topology LED driver IC family. Featuring a very compact footprint, the IC enables the design of LED bulbs and tubes with high constant-current accuracy while using a minimum number of components. A novel driver algorithm ensures high power factor (PF) and low total harmonic distortion (THD) while maintaining very high efficiency.
Housed in a compact SO-8 package, the drivers are greater than 93% efficient with a PF of over 0,9 and THD as low as 15%. Devices can be used in a low-side buck topology for reduced EMI or in a high-side buck topology which simplifies design. Delivering up to 22 W without a heatsink, the universal input (100 – 308 V a.c.) ICs incorporate a 725 V MOSFET for high reliability.
Designers can make use of small, off-the-shelf inductors due to a unique peak current control algorithm. The new devices meet all applicable international standards and have a host of protection features including thermal foldback with end-stop shutdown, short circuit protection, input and output OVP, over-current and SOA protection.
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