The NCP1012ST65T3G is an Integrated Circuit (IC) component manufactured by ON Semiconductor. It is designed specifically for offline flyback converters in low-power applications. Here is an overview and key features of the NCP1012ST65T3G:
Overview:
The NCP1012ST65T3G is a fixed-frequency PWM controller that operates in a critical conduction mode. It is commonly used in switch-mode power supplies (SMPS) to efficiently convert high voltage AC input to low voltage DC output.
Key Features:
1. Critical Conduction Mode (CrCM): The NCP1012ST65T3G operates in the critical conduction mode, which ensures high energy efficiency and minimizes switching losses.
2. Fixed Frequency PWM Controller: This IC operates at a fixed frequency of 65 kHz, providing stable and reliable switching performance.
3. Frequency Hopping: The NCP1012ST65T3G utilizes frequency hopping to minimize electromagnetic interference (EMI). It dynamically changes the switching frequency to spread the EMI spectrum, reducing noise and meeting regulatory requirements.
4. Soft-Start Function: The soft-start feature allows for a gradual rise in output voltage upon startup, preventing excessive current spikes and improving system reliability.
5. Overload Protection: The IC incorporates overload protection by utilizing cycle-by-cycle current limiting. It ensures safe and reliable operation, even in the presence of transient load variations
