PWM Controller for Programmable Power Converter (USB PD)

The RT7758M series, operating with Continuous Conduction Mode (CCM) or Quasi-Resonant Mode (QR Mode), is specifically designed to work with controllers, such as the RT7216KNE to provide a comprehensive solution for USB PD or programmable power adapters. This RT7758M not only offers a high power efficiency control scheme, but also achieves very low standby power consumption of 50mW under 5V standby conditions. The RT7758M is specifically design to achieve a wide range of output voltages by utilizing several innovations, including (1) By way of the DMAG pin, the RT7758M senses the output voltage to adjust loop gain for system stability, adjust the output overvoltage protection threshold voltage to protect external devices, and adjust the current limit to meet Limited Power Source (LPS) safety requirements; (2) The RT7758M is equipped with comprehensive protection features, including bulk-capacitor brown-in/brown-out protection, VDD Overvoltage Protection (VDD OVP), output Overvoltage/Undervoltage Protection (output OVP/UVP), Secondary Rectifier Short-Circuit Protection (SRSP), and external Over-Temperature protection (external OTP); (3) For constant output power regulation, a resistor connected to the CS pin can be used to achieve accurate line compensation across the universal input voltage range; and (4) The RT7758M also provides various features to protect against any failures occurring at the secondary-side component, such as the RT7216KNE or a shunt regulator. In applications, it is suggested that the RT7758M be used with a secondary controller, the RT7216KNE. To realize a robust and safe design that prevents all potential fault conditions due to misconnection of various devices, cables, plugs and receptacles. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.