恩智浦电源管理芯片NCP1337.SOP-7

The NCP1337 combines a true current mode modulator and a demagnetization detector which ensures full Borderline/Critical Conduction Mode in any load/line conditions together with minimum drain voltage switching (Quasi−Resonant operation)。The transformer core reset detection is done internally， without using any external signal，due to the Soxyless concept。The frequency is internally limited to 130 kHz， preventing the controller to operate above the 150 kHz CISPR−22 EMI starting limit。