RDK-268

LED (Light Emitting Diode) drivers have evolved significantly over recent years. The RDK-268 evaluation board is a high-performance LED driver that integrates a four-stage controller suitable for driving high current LED strings. It is designed to control a wide variety of single and string-based LED applications while demonstrating the capability, accuracy and reliability of the RDK-268 LED driver.

The RDK-268 board is suitable for driving up to 5 strings of LEDs in both constant-current and pulse width modulated (PWM) modes. It can be used in a variety of single and multiple constant current applications, including automotive headlights and taillights, deck lighting and aircraft cabin lighting. The RDK-268 board is ideal for high power applications, such as billboards, where its full-bridge technology is highly effective for driving high-current LEDs.

The RDK-268 board works on the principle of a standard four-stage LED driver. It includes up to four strings in its standard configuration, but can be expanded to drive up to five strings of LEDs in order to cover a wider range of power and current levels. In addition, the RDK-268 board offers options for controlling string current individually or controlling the total current across multiple strings.

The RDK-268 board is designed to optimize the efficiency and performance of LED lighting systems. It utilizes a four-stage architecture with optimized power management and sensing elements to drive multiple strings of LEDs. The four-stage architecture is designed to minimize power dissipation and maximize total efficiency. The RDK-268 board also provides temperature and over-current protection, and it is capable of reducing stress and protecting system components.

The RDK-268 board has four general modes of operation: constant-current, PWM dimming, analog dimming, and group dimming. In constant-current mode, the board delivers maximum power to the connected LEDs in a parallel configuration. When using PWM dimming, the board is capable of achieving up to 50% duty cycle to provide adjustable brightness and color temperature control. The analog dimming mode allows the user to adjust the current of each connected string, while the new group dimming mode can control multiple strings at the same time.

The RDK-268 board uses a high-accuracy sensing and feedback mechanism to ensure accurate LED current delivery. It also includes an in-circuit programming port for fast and easy adjustment of the voltage and current levels. The board is compatible with a wide range of LED drivers, supporting up to 12 Volts (for single-string applications) and 150 Volts (for multiple-string applications). In addition, the RDK-268 board is designed with a wide operating temperature range, reaching up to 125°C.

In summary, the RDK-268 evaluation board is a powerful LED driver suitable for driving up to 5 strings of LEDs. It utilizes a four-stage architecture with optimized power management and sensing elements to minimize power dissipation and maximize total efficiency. The RDK-268 board is suitable for a wide range of single and multiple-string applications, including automotive headlamps and taillights, deck lighting and aircraft cabin lighting. It is also capable of providing adjustable brightness and color temperature control with its PWM dimming mode.