1203P60 Datasheet

PMIC - AC DC Converters, Offline Switchers


Housed in SOIC−8 or PDIP−8 package, the 1203P60 represents a major leap toward ultra−compact Switchmode Power Supplies and represents an excellent candidate to replace the UC384X devices. Due to its proprietary SMARTMOS 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 kHz or 100 kHz 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 at light loads while offering excellent performance in standby conditions. Because this occurs at a user adjustable low peak current, no acoustic noise takes place.The NCP1203 also includes an efficient protective circuitry which,in presence of an output over load condition, disables the output pulses while the device enters a safe burst mode, trying to restart.Once the default has gone, the device auto−recovers. Finally, a temperature shutdown with hysteresis helps building safe and robust power supplies. 1203P60 Features • Pb−Free Packages are Available• High−Voltage Startup Current Source• Auto−Recovery Internal Output Short−Circuit Protection• Extremely Low No−Load Standby Power• Current−Mode with Adjustable Skip−Cycle Capability• Internal Leading Edge Blanking• 250 mA Peak Current Capability• Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz• Direct Optocoupler Connection• Undervoltage Lockout at 7.8 V Typical• SPICE Models Available for TRANsient and AC Analysis• Pin to Pin Compatible with NCP1200 1203P60 Applications • AC−DC Adapters for Notebooks, etc.• Offline Battery Chargers• Auxiliary Power Supplies (USB, Appliances, TVs, etc.)


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Manufacturer information


Fairchild has a rich history as a pioneer in the semiconductor industry and that pioneering spirit endures today. In an era where diversity can dilute focus and hamper innovation, we specialize in the development and manufacturing of a complete portfolio of low- to high-power solutions for the mobile, industrial, cloud, automotive, lighting, and computing industries. Fairchild is one of the most reliable partners in the industry, offering the shortest time from concept to silicon, expert FAEs for customer support, and a flexible, multi-source supply chain. Our vision is clear – anticipate the power efficiencies demanded by tomorrow’s electronic products and deliver an amazing design experience

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