ON Semiconductor NCP1200P100 PWM Current-Mode Controller

The ON Semiconductor NCP1200P100 is a versatile and efficient PWM current-mode controller designed for high-performance power supply applications. This device integrates a fixed-frequency current-mode controller with a high-voltage power MOSFET, making it an ideal choice for AC-DC adapters, offline battery chargers, and auxiliary power supplies.

Key Features

• Integrated Power MOSFET: The NCP1200P100 comes with a built-in 700V MOSFET, enabling it to handle high-voltage applications with ease while reducing external component count.
• Current-Mode Control: The current-mode architecture provides excellent audio susceptibility and inherent pulse-by-pulse control, enhancing the overall reliability and performance of the power supply.
• Fixed Frequency Operation: Operating at a fixed frequency of 100kHz, the NCP1200P100 ensures a predictable EMI behavior, which is crucial for applications that require stringent electromagnetic compatibility (EMC) standards.
• Auto-Recovery Overload Protection: The device features built-in overload protection that automatically recovers, protecting the power supply and the load from excessive power conditions.
• Frequency Foldback: To improve efficiency under light load conditions, the NCP1200P100 reduces its switching frequency, thereby minimizing standby power consumption.
• Low Startup Current: The low startup current minimizes the stress on the startup resistor and helps to achieve a greener power supply by reducing power losses during the initial power-up phase.
• Adjustable Skip Cycle Level: This feature allows designers to optimize the power supply's performance during low-power standby modes, further enhancing energy efficiency.
• Under-Voltage Lockout (UVLO): The built-in UVLO function ensures that the controller operates only when the supply voltage is within its specified range, thus safeguarding the device and the power system.

Applications

The NCP1200P100 is suitable for a wide range of applications, including:

• AC-DC Adapters for Laptops, Printers, and Audio Equipment
• Offline Battery Chargers
• Standby and Auxiliary Power Supplies
• Small Power SMPS (Switched-Mode Power Supplies)

With its robust design and comprehensive feature set, the ON Semiconductor NCP1200P100 is a reliable and efficient solution for designers looking to create compact and energy-efficient power supplies without compromising on performance.