TPS61311YFFR Integrated Circuits (ICs)

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PMIC - LED Drivers play an important role in powering, managing, and controlling the display and illumination of illuminated applications. Among PMIC - LED Drivers, the TPS61311YFFR has been widely used in display and lighting applications. This article will discuss the application field and working principle of TPS61311YFFR.

Overview of TPS61311YFFR

TPS61311YFFR, developed by Texas Instruments, is a high-efficiency LED driver with a boost-buck architecture. It also includes an internal step-up/step-down converter. This device is able to regulate the output voltage from 0.6 V to 20V with a maximum current of 300mA.

The operating temperature range of TPS61311YFFR is from -40°C to 125°C with an adjustable switching frequency range of 150 kHz to 1.5 MHz. It also features several protection mechanisms, including open-LED and over-temperature protection. Additionally, it comes with an adjustable soft-start function which helps avoid overshoot and inrush current.

Applications Field of TPS61311YFFR

Due to its wide operating range and protection features, the TPS61311YFFR is suitable for a variety of display and lighting applications. It can be used as a display or lighting controller for mobile phones, tablets, automotive headlights and taillights, LCDBacklight, traffic signals, and general illumination.

Apart from display and lighting applications, the TPS61311YFFR can also be used for LCD backlight and white LED driving, pad and portable game system applications. It can also be used in power management and charging circuits, motor control, and other regulated power supplies.

Working Principle of TPS61311YFFR

The TPS61311YFFR operates as a boost-buck converter, allowing it to operate within a wide input voltage range: 2.5 V to 20 V. It is able to regulate the output voltage to match the requirements of the LED string.

The internal synchronous step-up/step-down converter is designed to increase the LED current while reducing the number of LEDs in series. This allows the system to deliver consistent brightness and color even when the input voltage and LED load decreases. Additionally, the adjustable switching frequency allows for a higher power efficiency.

The over-temperature protection feature of the TPS61311YFFR helps to prevent the device from being damaged due to heat. The open-LED protection feature detects open-LED strings, reducing the risk of damage to the device.

The adjustable soft-start feature helps prevent overshoot and inrush current, while the wide operating temperature range offers greater reliability and robustness. Additionally, the adjustable maximum current helps reduce the risk of overheating and excessive power consumption.

Advantages of TPS61311YFFR

The TPS61311YFFR offers several advantages over other LED drivers. It offers a wide input voltage range, a wide operating temperature range, over-temperature protection, open-LED protection, soft-start protection, and adjustable maximum current.

Additionally, the internal step-up/ step-down converter allows for a reduction in LED strings as well as a higher efficiency. The adjustable switching frequency also helps control the output ripple, improving the overall efficiency.

Conclusion

The TPS61311YFFR is a highly versatile and efficient LED driver, suitable for a variety of display and lighting applications. It offers a wide input voltage range, a wide operating temperature range, and several protection features, making it an ideal solution for powering LEDs in illuminated applications.

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