AN4221

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LED lighting has become increasingly popular in recent years with its energy efficiency, eco-friendly features and long life. However, one of the biggest challenges to innovation in LED lighting is the design and manufacture of top-quality LED drivers, as they are a key factor in the overall performance of the lighting system. AN4221 is an LED driver IC which helps to integrate, enable and optimize LED lighting products.

AN4221 is an LED driver IC designed for use in LED lighting applications. It supports high-side and low-side LED strings with up to 10 LEDs and up to 8V voltage. It integrates pulse-width modulation (PWM) and low ripple constant-current (CC) control for flicker-free lighting, with support for multiple safety and protection features, such as over-current protection, thermal shutdown and voltage supervisor. With its excellent performance and unique features, the AN4221 is the perfect choice for many types of LED lighting applications, such as Constant Current Drivers (COB), Engines and Modules.

Application Field

The AN4221 is used for controlling and driving high-side and low-side LED strings, making it an ideal solution for LED lighting applications such as COBs, Engines and Modules. The AN4221 is designed to be a building block for many types of LED lighting applications, such as:

• Constant Current Drivers (COB): The AN4221 is perfect for driving high-power LED COB arrays with up to 10 LEDs. With its excellent performance and unique features, it is the ideal choice for high-power applications and multiple LED strings.
• Engines: The AN4221 is perfect for driving both low- and high-side LED engines. With its low ripple constant-current control, it ensures flicker-free lighting and the PWM control allows for easy dimming.
• Modules: The AN4221 is perfect for driving multiple LED modules, with up to 8V voltage. It has support for various safety and protection features, including short-circuit protection, thermal shut-down and voltage supervisor.

Working Principle

The AN4221 features a pulse-width modulation (PWM) control and low ripple constant-current (CC) control suitable for LED lighting, supporting high-side and low-side LED strings up to 8V voltage. Generally, the driver ICs must produce a constant output current over the lifetime of the LED; this is to ensure that layers of LED circuits are operating uniformly. The AN4221 is designed to ensure this, and has optimized the control algorithm such that the LED strings can operate more efficiently and providing more uniform illumination for unparalleled lighting performance.

The integrated low ripple constant-current control helps to eliminate flicker and allows for better control of LED strings at various voltages. The PWM control also supports easy dimming and brightness adjustment, providing dimming options for LED lighting applications. The AN4221 also helps to achieve cost savings, as it eliminates the need for extra drivers or controllers. Other features such as over-current protection, thermal shutdown and voltage supervisors helps to achieve excellent system reliability.

Conclusion

To sum up, the AN4221 is an excellent choice for LED lighting applications such as COBs, Engines and Modules. It helps to integrate, enable and optimize LED lighting products with its excellent performance, integrating low ripple constant-current control for flicker-free lighting and pulse-width modulation control for easy dimming. In addition, it has support for various safety and protection features to ensure system reliability. Thus, the AN4221 is the perfect choice for many types of LED lighting products.

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