IR2E51Y6 Integrated Circuits (ICs)

IR2E51Y6 Application Field and Working Principle

IR2E51Y6 is a highly integrated LED driver with a built-in synchronous rectifier, and it can be used in various LED display applications. It supports a wide range of LED control and dimming functions, including adjustable dimming current, variable frequency PWM dimming and power supply dimming. In addition, it supports a number of safety features such as over temperature protection (OTP) and over voltages protection (OVP). The IR2E51Y6 can drive LED arrays up to 8 LED elements in series with a maximum current of 3.5A. It also supports a wide range of LED operation modes, including flicker free dimming, constant forward current, constant voltage, ac dimming, dimming-sensitive and dimming plus current.

The IR2E51Y6 is designed to drive LEDs safely and reliably in most application environments. For instance, it has built-in under-voltage lockout (UVLO) and over temperature protection (OTP) to protect the LEDs from potential damage due to operating outside of the optimal operating range. Its OVP feature protects the LEDs from over-voltage damage, and its fast start-up time minimizes the inrush current when the LEDs are switched on. The on-chip dimming logic provides easy-to use, programmable dimming capabilities, and its PWM frequency can be adjusted from 200Hz to 50kHz. The IR2E51Y6 also features a low-ripple power supply, which helps to reduce power dissipation in the LED array.

How it works?

The IR2E51Y6 LED driver works by using an array of LED resistors, capacitors, and transistors to control the current delivered to the LED array. First, an internal voltage regulator sets the output voltage of the LED driver to the desired voltage level. The output voltage is then converted to current in an on-chip Charge Pump, which stores and delivers the current on demand. Then the internal N-channel MOSFETs are used to control the amount of current that is delivered to the LEDs. The MOSFETs are controlled by the internal PWM controller, which drives the MOSFETs at a set frequency and dimming level to control the brightness of the LEDs.

The IR2E51Y6 can be programmed to provide a wide range of dimming options, including constant current, constant voltage, and adaptive dimming. It supports a wide range of LED operation modes, including flicker-free dimming, dimming-sensitive and ultra-low power mode. It also supports dimming-plus current, allowing it to drive high-current LEDs up to 8 LEDs in series. The integrated synchronous rectifier allows the IR2E51Y6 to operate in PWM mode with minimal power loss.

Advantages of IR2E51Y6

The IR2E51Y6 has a wide range of advantages that make it suitable for use in a variety of LED display applications. Firstly, its small size allows for easy installation and integration into existing systems. Additionally, the integrated synchronous rectifier eliminates the need for an external power supply, reducing costs and increasing system efficiency. The integrated PWM controller provides the flexibility to adjust the intensity and dimming level of the LED array over a wide range, from 0.1 to 100 percent.

The IR2E51Y6 LED driver also features a number of safety features, such as over-voltage and over-temperature protection, as well as under-voltage lockout, allowing the LED array to be driven safely and reliably. In addition, its low-ripple power supply minimizes power dissipation in the LED array, making it more efficient to operate and reducing the need for additional cooling systems. Finally, the IR2E51Y6 can be easily programmed to support a wide range of dimming modes and current levels, allowing for greater flexibility in LED application.