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PFC/PWM Controller

Mon, 10/03/2005 - 9:16am

ON Semiconductor introduces the NCP1603 — a combo PFC/PWM controller with integrated standby and high voltage startup capabilities. The NCP1603 combines a power factor correction (PFC) controller chip and a pulse width modulation (PWM) control chip in a single, 16-pin SOIC package. This combination simplifies the task of designing an offline, AC/DC power supply that simultaneously meets governmental requirements for power factor correction and low standby power consumption. Target applications for this device include products such as notebook and LCD adapters, and other consumer electronics. Under light load conditions, the NCP1603 PWM controller disables the PFC function, saving in the range of 200 mW of power. The NCP1603’s PFC-stage provides near-unity power factor and is designed to operate in fixed frequency, Discontinuous Conduction Mode (DCM) to lower EMI and reduce coil size. In addition, the PFC offers a variety of protective features including inrush current detection, programmable overcurrent protection as well as overvoltage protection.


ON Semiconductor


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