RT9469WSC

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The RT9469WSC is a secondary-side synchronous rectification controller specifically designed for switching flyback converters with either one or two secondary windings for either high voltage (HV) output application or combination of HV and low voltage (LV) outputs. This device is capable of achieving high efficiency with low cost by utilizing secondary-side synchronous rectification.

The RT9469WSC is a secondary-side synchronous rectification controller intended for use with a power MOSFET and a Schottky diode in a flyback topology. It achieves high efficiency by using a reliable secondary side synchronous rectification scheme and implements advanced protection functions.The RT9469WSC is a general-purpose synchronous rectification controller that fits a wide range of power supplies with flyback topology. It can be used for a wide variety of applications, including LED lighting, AC/DC adapters and telecom/server applications.

RT9469WSC Application Field and Working Principle

The RT9469WSC is a secondary-side synchronous rectification controller specifically designed for switching flyback converters with either one or two secondary windings for either high voltage (HV) output application or combination of HV and low voltage (LV) outputs. This device is capable of achieving high efficiency with low cost by utilizing secondary-side synchronous rectification (SR).

The RT9469WSC is perfectly suited for battery charging applications. It is optimized to support quick and efficient charging of batteries. It supports dual-step charging with constant current/constant voltage mode, trickle-charging mode, and programmable float voltage mode. The RT9469WSC provides high system efficiency and performance while offering robust protection features.

Using a synchronous rectifier, the switching efficiency can be improved. Power losses in the synchronous rectifier can be minimized by matching the turn-on time of the synchronous rectifier closely to the turn-off time of the main switch, reducing the deadtime between the two switches. The RT9469WSC features a high-gain control loop that helps to accurately adjust the timing of the synchronous rectifier, ensuring optimal efficiency compared to standard rectifiers.

The RT9469WSC features over-voltage protection (OVP), under-voltage protection (UVP), over-temperature protection (OTP), open-loop protection, over-current protection (OCP) and adjustable soft-start functionality to ensure reliable, safe, and robust power supply design. The RT9469WSC is available in a P-lead SOT-23-6 package.

In summary, the RT9469WSC is an ideal synchronous rectification controller for flyback converters dedicated to battery charging applications due to its excellent performance and robust protection functions. It is capable of achieving high efficiency with low cost, making it a preferred choice for designers looking for cost-effective solutions for their applications.

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