The RT7781S is a high-performance current mode PWM controller featuring Richtek’s proprietary PowerZero technology. The PowerZero offers an excellent green power solution, particularly under light-load and no-load conditions. The integrated high-voltage device enables a fast start-up function without the need for external start-up resistors. Additionally, It includes brown-in and brown-out detection.The RT7781S provides comprehensive protection functions, including internal Over-Temperature Protection (OTP) and VDD Overvoltage Protection (OVP). It also features Secondary Rectifier Short-Circuit Protection (SRSP) and Current Sensing pin (CS) open-circuit protection. These protections simplify and enhance the reliability of power supply unit designs.The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
应用
- Notebook Adapters
- Switching AC-DC Adapters with Low No-Load Input Power
- TV and Monitor Applications
- Open Frame Power Supply