The NCP1079BBP130G is an integrated circuit (IC) component designed by ON Semiconductor. It is a highly efficient controller for offline power supplies, primarily used in applications like chargers, adapters, and various consumer electronics.
Key Features and Functions:
1. Primary-Side Control: The NCP1079BBP130G operates in primary-side control mode, eliminating the need for opto-couplers or secondary feedback circuits. This simplifies the overall design and reduces component count, contributing to cost savings.
2. Quasi-Resonant Operation: It incorporates a quasi-resonant (QR) switching method, which reduces power losses and improves efficiency. QR control adjusts the switching frequency dynamically to provide optimal power transfer, reducing electromagnetic interference (EMI) as well.
3. Valley Lockout for Improved Efficiency: The IC utilizes valley lockout (VLO) to ensure that switching starts when voltage across the primary winding is at a predefined level. This feature enhances efficiency and minimizes power losses during the switching process.
4. Burst Operation Mode: The NCP1079BBP130G supports burst mode operation at light loads. When the load decreases, the IC automatically enters burst mode, significantly reducing power consumption and increasing overall efficiency.
5. Frequency Dithering: This IC also includes frequency dithering functionality, which modulates the switching frequency to spread the EMI spectrum, making it easier to meet stringent regulatory requirements
