1203P60 PDF Datasheet
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Description
This is NCP1203. NCP1203 PWM Current Mode Controller for Universal Off Line Supplies Featuring Standby and Short Circuit Protection
Housed in SOIC 8 or PDIP 8 package, the NCP1203 represents a major leap toward ultra compact Switchmode Power Supplies and represents an excellent candidate to replace the UC384X devices. Due to its proprietary SMARTMOSt Very High Voltage Technology, the circuit allows the implementation of complete off line AC DC adapters, battery charger and a high power SMPS with few external components. With an internal structure operating at a fixed 40 kHz, 60 kH- or 100 kH- switching frequency, the controller features a high voltage startup FET which ensures a clean and loss less startup sequence. Its current mode control naturally provides good audio susceptibility and inherent pulse by pulse control. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so called skip cycle mode and provides improved efficiency.