NCP1012AP065

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PMIC, namely Power Management Integrated Circuits, are responsible for monitoring, controlling, and converting electrical power in a system. Many system vendors choose AC/DC converter products to provide reliable and efficient output power. The NCP1012AP065 is a high-efficiency, isolated and non-isolated AC/DC converter and off-line switcher manufactured by ON Semiconductor.

Introduction

The NCP1012AP065 is a high-efficiency non-isolated AC/DC wall adapter and off-line switcher IC, with a guaranteed minimum efficiency of 80%-85%. It uses an integrated flyback MOSFET to provide an isolated output voltage of 15V and requires a minimum input voltage of 90V AC to 260V AC. This device is designed to provide high efficiency, low cost, and high integration, allowing for very small and highly efficient AC/DC adapter designs.The NCP1012AP065 also features a wide range of protections, including Under Voltage Lock Out (UVLO), Overload Protection (OLP), and Thermal Shutdown (TSD).

Application Field

The NCP1012AP065 is ideal for a wide range of non-isolated applications, including AC/DC wall adapters and off-line switchers, USB Power Adapters, Notebook and Desktop Brick Adapters and isolated RGB Lighting, among others. The features of the NCP1012AP065 make it an ideal choice for applications requiring power conversion efficiency and very small form factor.

Working Principle

The NCP1012AP065 works as an AC/DC converter and off-line switcher, taking in AC mains power and providing a regulated output voltage. The device utilizes AC power cycling, a power saving technique where the output is shut off until a minimum load current is detected, saving significant power while maintaining the output voltage. In order to provide protection against overloading, short-circuiting, overvoltage and overheating, the NCP1012AP065 includes several integrated protections. The Under-Voltage Lock-Out (UVLO) protection circuit keeps the output voltage from dropping below a certain voltage, protecting the load from hazardous low voltages. The Overload Protection (OLP) circuit detects when the load current exceeds a certain limit (set by the external resistor) and shuts down the power supply, preventing further increase in load current and protecting the device from damage. The Thermal Shutdown (TSD) protection circuit reduces the power supply output if the junction temperature rises above a certain limit, decreasing the risk of device failure due to overheating. The NCP1012AP065 uses a dynamic switching frequency to ensure efficient power delivery and low EMI. The device has multiple pulse-width modulation (PWM) cycles. During the first PWM cycle, the NCP1012AP065 charges an external output capacitance, providing the required output voltage. During the second PWM cycle, the device performs a "burst" mode, where devices are able to reduce the current consumption while maintaining a satisfactory output voltage. These two PWM cycles allow the device to regulate the output voltage while minimizing output power. The NCP1012AP065 is capable of providing output voltage levels from 0.275V to 30V and up to 18A of current. These features make the NCP1012AP065 an ideal choice for a wide range of AC/DC wall adapter and off-line switcher applications.

Conclusion

The NCP1012AP065 is a versatile, high-efficiency AC/DC converter and off-line switcher IC from ON Semiconductor. It offers high conversion efficiency, power savings, and a wide range of protections that make it ideal for a wide range of applications. The NCP1012AP065 also features an integrated MOSFET that provides an isolated output voltage of 15V, making it well suited for isolated RGB lighting. With its high efficiency, low cost, and wide input voltage range, the NCP1012AP065 is an excellent choice for AC/DC wall adapters, USB power adapters, notebook and desktop brick adapters, and off-line switchers.

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