STEVAL-TLL008V1

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The STEVAL-TLL008V1 is an evaluation board by STMicroelectronics designated for testing the performance of indium gallium nitride (InGaN) or RGB high power LEDs. It is part of STMicroelectronics’ STDRIVE family of LED drivers, designed primarily for automotive and automotive-like applications, but also suitable for general lighting, signage, and industrial applications.

The STEVAL-TLL008V1 is a feedback-based buck converter, featuring a 100V/3A PFC converter, capable of driving up to 4 strings of LEDs with a maximum output power of 80W. The inrush current limit feature is also included, and the board is fully protected against overvoltage, undervoltage, overheating and short-circuits.

The STEVAL-TLL008V1 evaluation board also includes two ICs; the STCIPL004A, which is a constant current LED driver, and the STDC003, which is a high-efficiency DC-DC buck-converter. These two ICs allow the board to drive any combination of string current and output power in a wide range of applications. For example, the board can be used to drive LEDs in automotive applications, with a maximum string current of 1A, a maximum output power of 10W and a minimum output power of 5W.

The STEVAL-TLL008V1 evaluation board features an operating temperature range of -40 to 85°C, with an input voltage range of 9V - 36V. It also includes an I2C interface to allow for programmable settings of current, PWM dimming signals and other parameters. The evaluation board also includes a ST-LINK/V2 debugger and an STM32F101 microcontroller with built-in firmware.

The STEVAL-TLL008V1 evaluation board is a very useful tool for testing the performance of InGaN or RGB high power LEDs. The board is also exceptionally reliable, with an extended temperature range, making it suitable for a variety of applications, such as automotive lighting, industrial applications, and general lighting.

In terms of working principle, the STEVAL-TLL008V1 evaluation board uses a feedback-based Buck converter to drive LEDs. It uses an internal loop design whereby the output current is controlled by setting the duty cycle of the PWM signal, which is then monitored by the load sense circuit. The load sense circuit feeds back the information to the Buck converter to adjust the duty cycle of the PWM signal accordingly. This allows the system to deliver the desired output current while keeping the power loss at a minimum.

In conclusion, the STEVAL-TLL008V1 is a powerful and reliable evaluation board designed for testing the performance of InGaN or RGB high power LEDs. It features a 100V/3A PFC converter, an extended temperature range, an I2C interface for programmable settings, and a ST-LINK/V2 debugger and an STM32F101 microcontroller with built-in firmware. The board is also very easy to use and is ideal for a variety of applications, such as automotive lighting, industrial applications, and general lighting. Additionally, the board is designed to use a feedback-based buck converter, which makes it very energy-efficient while delivering the desired output current.

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