NCP1217D
Enhanced current mode PWM controllers in 8-pin SOIC packages
Manufacturer： ['onsemi', 'rochester']
series introduction
# NCP1217D Product Series Introduction
## 1. Overview
The NCP1217D product series is a highly efficient and reliable family of integrated circuits designed for power supply applications. These devices are engineered to meet the demanding requirements of modern electronic systems, offering a comprehensive solution for power management in a wide range of consumer, industrial, and automotive applications.
## 2. Key Features
### 2.1 High - Efficiency Operation
- The NCP1217D series incorporates advanced control algorithms that enable high - efficiency power conversion. This is crucial for reducing power losses and minimizing heat generation, which in turn enhances the overall reliability and lifespan of the power supply system. For example, in a typical offline flyback converter application, it can achieve efficiency levels of up to 90%, significantly reducing energy consumption compared to less efficient alternatives.
### 2.2 Wide Input Voltage Range
- These devices support a wide input voltage range, typically from 85V to 265V AC for universal mains applications. This makes them suitable for use in different regions around the world without the need for complex voltage - adaptation circuits. In addition, they can also handle a wide range of DC input voltages, providing flexibility in various power supply designs.
### 2.3 Current - Mode Control
- The NCP1217D utilizes current - mode control, which offers several advantages over voltage - mode control. Current - mode control provides better line and load regulation, faster transient response, and inherent short - circuit protection. It allows for precise control of the inductor current, ensuring stable operation under different load conditions.
### 2.4 Frequency Foldback
- One of the notable features of the NCP1217D series is frequency foldback. When the load on the power supply decreases, the switching frequency of the device is automatically reduced. This helps to improve efficiency at light loads by reducing the switching losses. For instance, in standby mode, the frequency foldback feature can significantly lower the power consumption of the system, making it compliant with energy - saving regulations.
### 2.5 Built - in Protection Features
- **Over - Voltage Protection (OVP)**: The NCP1217D is equipped with over - voltage protection to safeguard the power supply and the connected load from excessive voltage. If the output voltage exceeds a predefined threshold, the device will take appropriate action, such as shutting down the power supply or reducing the output power to prevent damage.
- **Over - Current Protection (OCP)**: In case of an over - current condition, the OCP feature will limit the current flowing through the power supply. This protects the power components from overheating and potential failure, ensuring the safety and reliability of the system.
- **Thermal Shutdown**: To prevent overheating, the NCP1217D has a thermal shutdown mechanism. When the temperature of the device exceeds a certain limit, it will automatically shut down until the temperature drops to a safe level.
## 3. Applications
### 3.1 Consumer Electronics
- In consumer electronics such as smartphones, tablets, and laptops, the NCP1217D can be used in the power adapter to provide a stable and efficient power supply. Its high - efficiency operation helps to reduce the charging time and extend the battery life of these devices. Additionally, its compact size and low power consumption make it suitable for use in small - form - factor power adapters.
### 3.2 Industrial Equipment
- Industrial equipment often requires a reliable and robust power supply. The NCP1217D series can be used in industrial power supplies, motor drives, and control systems. Its wide input voltage range and built - in protection features make it suitable for use in harsh industrial environments where voltage fluctuations and electrical disturbances are common.
### 3
Images for reference
8-SOIC
Image Preview
Image Preview