PSR ACDC-CN1609

CN1609 is internally integrated with PFM modulation controller and power BJT, and adopts advanced primary side control technology. It does not need optocoupler and other feedback elements on the periphery. It is dedicated to high performance, simplified AC-DC switching power supply with peripheral circuits. The internal CV and CC regulation make it have high output precision, stability and reliability. The chip provides extremely comprehensive and excellent intelligent protection functions, including cycle by cycle over-current detection (external CS resistance can be set), overload protection, over-voltage protection, short circuit protection and soft start function. When the chip is light loaded, the chip uses frequency reduction adjustment and burping operation, which makes CN1609 have a low standby power consumption of 30mW. The frequency jitter and soft start function of the chip make it have good EMI characteristics. CN1609 provides a very good control mode for the customer's small power supply system developed with flyback architecture. It also provides a good implementation mode for temperature controller, intelligent switch and secondary market intelligent electricity meter.