EVB_RT8497AGS Development Boards, Kits, Programmers

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EVB-RT8497AGS is a type of evaluation board that is part of the LED drivers category. As a high-performance LED driver, it has a variety of applications in the field of LED lighting, and is suitable for applications such as series and parallel connection of LEDs, wall washers, LED displays, LED strips and LED backlighting. EVB-RT8497AGS integrates Richtek’s RT8497AGS LED driver, a single-channel LED controller. Its key features are constant current regulation, a built-in active PFC function and high efficiency digital dimming control.On the board, the RT8497AGS is powered by the 18V DC supply, while the LED string is connected to its respective terminals. The RT8497AGS is connected to the onboard control registers. The control registers are used to configure the device to operate in the desired mode. Communication between the RT8497AGS and the control registers is through an I2C/SMBus interface.The RT8497AGS uses a voltage regulator circuit to deliver a constant current to the LED string. The output current is determined by the voltage on a single resistor. This resistor is connected to the AVDD_REF pin of the RT8497AGS, and is set by the user depending on their desired current.The RT8497AGS also includes an active PFC circuit, which improves power factor and efficiency. This active PFC circuit is enabled by the ENABLE_PFC pin of the device, and is controlled by the PFC_LEVEL register.The RT8497AGS also features a high efficiency digital dimming control, which is based on the digital PWM signal of an external MCU. This digital dimming control is enabled by the enable_DIMMING pin. The RT8497AGS supports both linear and nonlinear dimming curves, allowing the user to customize the dimming control to their desired effect.In addition, the board also includes several protection circuits such as an over-temperature protection circuit, over-voltage protection circuit, over-current protection circuit and LED open-circuit protection circuit. These protection circuits are activated by a single pin from the board’s MCU and are enabled/disabled through external control registers.In summary, the EVB-RT8497AGS evaluation board is a high-performance LED driver that is designed to provide industry standard features such as constant current regulation, active PFC circuit and high efficiency digital dimming control. It is suitable for applications in the field of LED lighting such as series and parallel connection of LEDs, wall washers, LED displays, LED strips and LED backlighting.

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