TLC5971PWP

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PMIC - LED Drivers

TLC5971PWP is a LED controller from Texas Instruments, offering a wide range of features used mainly in LED lighting applications. It is designed for typical LED lighting and lighting control products, enabling high-precision current matching and control over a wide input voltage range. This LED controller serves as the digital interface with the LED driver package, eliminating the need for external logic to control an LED array. The device features two channels, each channel supporting a local dimming control and a high-speed, 8x PWM dimming frequency.

Application field of TLC5971PWP

The main application fields of TLC5971PWP is LED lighting, it provides excellent and precise LED lighting control, mainly in LED street light and LED advertising board, LED stage lighting, etc.

Compared to other LED drivers, TLC5971PWP have several advantages,

• Low EMI: it suppors low EMI, eliminating the interference between LED unit and other electronic products nearby.
• Wide voltage range: it supports a wide input voltage range, allowing it to be suitable for various application scenarios.
• High accuracy: it provided accurate and safe current control, so that the LED lights can lit up and off smoothly without over-current protection.
• Accurate local dimming control: it supports 8x PWM dimming frequency and local dimming control, realizing accurate light dimming.

Working principle of TLC5971PWP

The working principle of TLC5971PWP is to change the output current of an LED by regulating the voltage applied to them. The chip first use an internal voltage reference to set up a stable current control circuit and control the current in an accurate way. The chip is then controlled by an external logic and it can adjust the output current by changing the voltage or current applied to the chip, or by changing the frequency of the pulse.

The working process can be divided into the following three steps.

• Step 1: Set up the stable current control circuit: the chip use an internal voltage reference to set up a stable current control circuit and control the current in an accurate way.
• Step 2: External logic control: The chip is then controlled by an external logic which can adjust the output current by changing the voltage or current applied to the chip, or by changing the frequency of the pulse.
• Step 3: Adjust the output current: The chip can then adjust the output current by changing the voltage or current applied to it, or by changing the frequency of the pulse.

TLC5971PWP is a high-performance LED driver that offers a wide range of features used mainly in LED lighting applications, including low-EMI, wide input voltage range, accurate current control and local dimming control. It serves as a great choice for LED lighting control, such as LED street light, LED advertising board and LED stage lighting.

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