MC44603A

MC44603A w reliability. The MC44603A has several distinguishing features when a t a The D MC44603A is an enhanced high performance controller that is . designed for off−line and dc−to−dc converter applications. specifically wdevice has the unique ability of automatically changing operating This w modes if the converter output is overloaded, unloaded, or shorted, offering the designer additional protection for increased system Fixed Frequency, Variable Frequency, Standby Mode compared to conventional SMPS controllers. These features consist of a foldback facility for overload protection, a standby mode when the converter output is slightly loaded, a demagnetization detection for reduced switching stresses on transistor and diodes, and a high current totem pole output ideally suited for driving a power MOSFET. It can also be used for driving a bipolar transistor in low power converters (< 150 W). It is optimized to operate in discontinuous mode but can also operate in continuous mode. Its advanced design allows use in current mode or voltage mode control applications. Features 16 1 4 Enhanced Mixed Frequency t e Mode GreenLine t PWM e Controller: Sh U m o .c http://onsemi.com MARKING DIAGRAMS Pb−Free Packages are Available* Current or Voltage Mode Controller Operation up to 250 kHz Output Switching Frequency Inherent Feed Forward Compensation Latching PWM for Cycle−by−Cycle Current Limiting Oscillator with Precise Frequency C...