ON Semiconductor NCP1230AD65R2: High-Efficiency PWM Controller

The NCP1230AD65R2 from ON Semiconductor is a versatile and efficient PWM controller designed to meet the demands of high-performance power supply systems. This device is part of the NCP1230 series, which is renowned for its integration of a fixed-frequency current mode controller with a high-voltage power switch.

With a built-in 65 kHz switching frequency, the NCP1230AD65R2 provides a compact solution for AC-DC power supplies, particularly for applications such as offline battery chargers, DVD players, set-top boxes, and auxiliary power supplies for PCs and servers. Its high-frequency operation not only enables the use of smaller passive components but also contributes to improved power efficiency and reduced electromagnetic interference (EMI).

One of the key features of the NCP1230AD65R2 is the inclusion of a dynamic self-supply (DSS) circuit, which eliminates the need for an auxiliary winding or external bias supply. This feature simplifies the design and reduces the overall bill of materials. Additionally, the controller offers built-in Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO), ensuring the safety and reliability of the power supply under various operating conditions.

The device also incorporates ON Semiconductor's proprietary Skip Cycle Technology, which enhances light-load efficiency by skipping unnecessary pulses. This feature is particularly useful for meeting energy-saving standards such as Energy Star or the European Commission's Code of Conduct (CoC).

Furthermore, the NCP1230AD65R2 includes an adjustable overcurrent protection (OCP) feature that allows designers to set the desired level of current protection, ensuring the power supply is safeguarded against short circuits and overloads. The built-in Brown-Out Protection (BOP) ensures stable operation during low input voltage conditions.

In summary, the NCP1230AD65R2 from ON Semiconductor is a robust and efficient PWM controller that offers a range of features designed to enhance the performance and reliability of your power supply designs. With its high level of integration and focus on energy efficiency, it represents an excellent choice for engineers looking to create compact, high-performance power solutions.