RT8452GS

PMIC - LED Drivers

RT8452GS is a low-side power switch driver​ integrated circuit specifically designed to drive LEDs. It features low RDS(on) and low EMI noise, making it an ideal choice for TV/monitor backlight applications. This IC also features a high-voltage protection circuit, and also provides over-temperature, LED connect/short, and current limit protection.

Application Field

The RT8452GS can be used in several applications, including automotive lighting, PC/tablet/mobile applications, industrial automation, control system, office equipment, and consumer devices. This driver is suitable for driving LEDs with high current supply, and due to its over-temperature protection and low standby current, it can reduce the power consumption of electronic products. Moreover, it can guarantee long-term product maintenance and saves energy.

Working Principle

The RT8452GS is designed to drive LEDs with high current supply. It works by controlling the current supply from the outside power source, optimizing the LED forward voltage while maintaining a constant current. This is done by using a feedback current supplied from the LED as the reference, controlling the combination of its MOSFET and current sensing resistor to achieve maximum efficiency.

The driver works by comparing the voltage drop across its current sensing resistor with a high level voltage reference. When the voltage drop exceeds the reference, the driver takes action by adjusting the resistance width of the MOSFET accordingly. This helps to optimize the LED forward voltage while maintaining constant current, preventing it from overheating or becoming damaged due to too much current.

In addition, the RT8452GS is designed with several enhanced features like over-temperature protection, LED short/open circuit protection, and current limit protection. This helps to further extend the reliability and durability of the device and ensure the long-term product maintenance.

Conclusion

The RT8452GS is an ideal choice for driving LEDs with high current supply, due to its low RDS(on) and low EMI noise and other enhanced features like over-temperature, LED connect/short, and current limit protection. It is suitable for a wide range of applications and can guarantee long-term product maintenance and saves energy.