RT9269GE

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PMIC - LED Drivers: RT9269GE Application Field and Working Principle

LEDs, or light emitting diodes, are becoming increasingly prevalent across various industries and applications. LED technology is particularly attractive due to its high efficiency and long lifetime, making it cost-efficient and ideal for numerous applications. To ensure the effective and consistent operation of LEDs, power management and current regulation must be properly handled. This is where LED drivers come into play, and the RT9269GE is an ideal example.

What is the RT9269GE?

The RT9269GE is a switch mode current regulator designed specifically for providing power supply solutions to LEDs. It is optimized to have the highest efficiency while still maintaining a small form factor. The device features a programmable constant current (IOUT) and requires minimal external components, allowing it to be quickly and easily integrated into most LED applications.

Application Field

The RT9269GE can be used in a variety of applications, due to its flexibility, such as portable systems, indoor, or outdoor lighting solutions, automotive lighting, or any all types of applications involving constant current power conversion.

Working Principle

The RT9269GE works by regulating the output current, with the regulator relying on a pulse-width modulation (PWM) system for its regulation. A PWM signal, based on a set value of IOUT, is generated and then used to control an external MOSFET connected to the LED. Whenever the current through the LED increases, the PWM duty ratio is reduced so that the current through the LED is restricted and stay at the desired level. As a result, the output current of the LED is constantly regulated despite any potential change in the input voltage or load resistance.

Advantages Of The RT9269GE

The RT9269GE offers many advantages compared to other LED driving solutions. These include:

• High efficiency - up to 95%
• Wide input voltage range - from 4V to 24V
• Low current consumption - only 1.2mA
• Programmable IOUT with 1.2mA accuracy
• Wide operating temperature range - from -40°C to 85°C
• Small form factor
• Over-temperature and over-current protection

In summary, the RT9269GE is an ideal solution for building LEDs applications. With its high efficiency, wide input voltage range, low current consumption, and other advantages, it is easy to see why this device is quickly becoming the go-to solution for LED power supply solutions.

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