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The RT7206A is a programmable controller with a high integration of the internal feedback compensation, blocking N-MOSFETs and the current sense. An internal MCU is designed to handle various proprietary protocols via the D+/D- interface and support the Type-C USB PD via the CC1/CC2 pins. This controller is a specific design with high integration for off-line AC-DC converters to possess the high power density. The RT7206A integrates a constant voltage loop, a constant current loop and the built-in compensation in the feedback control so as to regulate output voltage and current. With the proprietary design, this controller not only possesses the feature of component-count saving via the built-in feedback compensation, but also provides the performance of enhanced transient response and safety level via the integration of diverse functions and protections. In applications requiring high-precision control, a dual operational amplifier is adopted in the Digital-to-Analog Converter (DAC) to serve reference voltages used for regulation of voltage loop and current loop in programming the constant voltage (CV) and the constant current (CC).
RT7206A Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Protocol Support <ul class="lv2"> <li></li><li>USB PD2.0/PD3.0 and PPS </li><li>Proprietary Protocols </li></ul> </li><li>Highly Integrated <ul class="lv2"> <li></li><li>Suited for 3V to 13V VDD Range </li><li>Embedded MCU with an Mask ROM of 32kB, an OTP-ROM of 8kB, and an SRAM of 1.5kB </li><li>Built-in Blocking N-MOSFET and Current Sense </li><li>Built-in Shunt Regulators for Constant Voltage and Constant Current Control </li><li>Built-in Internal Feedback Compensation </li><li>Programmable Linear Cable Compensation </li><li>CC Tolerance < 100mA </li><li>VDD Pin for Quick Discharge of Output Capacitor </li><li>< 5mA Operating Current in Normal Mode </li><li>< 1.5mA Operating Current in Sleep Mode </li><li>< 900μA Operating Current in Green Mode </li></ul> </li><li>Protection <ul class="lv2"> <li></li><li>Adaptive Output Over-Voltage Protection </li><li>Adaptive Under-Voltage Protection </li><li>CC1/CC2/D+/D-/RT Over-Voltage Protection </li><li>Firmware-Programmable Over-Current Protection </li><li>Firmware-Programmable Over-Temperature Protection </li></ul> </li></ul></div>
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RT7206A Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Travel Adapters with USB PD Type-C Control </li><li>Travel Adapters with Fast Charge Protocols (e.g., FCP, SCP, AFC and QC2.0/QC3.0) </li></ul></div>
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