PWM Controller for Programmable Power Converter (USBPD)


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The RT7786 series is specifically designed to work with controllers, such as RT7207, so as to provide a total solution for the USB PD or the programmable power adapter. The RT7786 is able to achieve the high efficiency performance, meet safety standards, and consume low standby power, which is normally less than 30mW in a 5V standby condition.

The RT7786 offers several innovative features so as to provide a solution having an output voltage of wide-range. By using the DMAG pin, the RT7786 senses output voltages to adjust the loop gain for system stability, to adjust the threshold voltage of output over-voltage for external device protection, and to adjust the current limit to meet Limited Power Source (LPS) safety requirements.

The RT7786 is also equipped with comprehensive protection features, including brown-in/brown-out protection, VDD over-voltage protection (VDD OVP), output over-voltage/under-voltage protection (Output OVP/UVP), secondary rectifier short-circuit protection (SRSP), and external over-temperature protection (External OTP). For applications with constant output power regulation, a resistor connected to CS pin can be used to achieve the accurate line compensation across the universal input voltage range. The RT7786 also provides various features to protect against failures occurring at the secondary-side component, such as the RT7207 or a shunt regulator.

The RT7786 and the RT7207 can be used together to realize a robust and safe design preventing all potential fault scenarios, due to versatile and unknown connections of various devices, cables, plugs and receptacles.


  • USB PD and Programmable Power Adapters
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PWM Controller for Programmable Power Converter (USBPD)2016/12/29
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