NE5565 electronic ballast controller

Published:2011/7/13 23:12:00 Author:TaoXi | Keyword: electronic ballast, controller | From:SeekIC

The NE5565 is designed as one kind of electronic ballast controller which is produced by the PHILIPS company. This kind of bipolar type single chip IC integrates the power factor correction (PFC) controller and the self-oscillating half-bridge drive which has the various control and protection functions. By using the NE5565 to design the fluorescent electronic ballast, we can reduce the component number, the volume, the weight and improve the reliability and safety of the ballast. 1. The internal structure and the main features of the NE5565 The NE5565 controller has two switching power supply circuits: the first one is the PFC boost converter controller, it improves the electronic ballast power factor to higher than 0.99, and the current harmonic distortion is extremely low, at the same time it supplies the protection for the AC transient voltage; the second one is the half-bridge oscillator circuit.



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