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USB Type-C and Power Delivery

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Product Line

The following is a list of products released in the last

Part NumberDescriptionShareDatasheetFree Sample
RT7205BProgrammable SMPS and USB Type-C Controller Not available
RTQ2115A-QACharging Port Controller and Integrated 36V 3A Synchronous Buck Converter Not available
RT7885All-in-One USB PD and Bidirectional PWM Buck-Boost Controller Not available
RT7202KJHighly Integrated USB PD Type-C Controller for SMPS Not available
RT7207KHighly Integration USB PD Controller with Synchronous Rectification Not available
RT7207KBHighly Integration USB PD Controller with Synchronous Rectification Not available
RT7202KHighly Integrated USB PD Type-C Controller for SMPS Not available
RT7880USB Type-C PD and PWM Buck-Boost Controller with AnyPower™ and PDsafe™ Features Not available
RT7880BUSB Type-C PD and PWM Buck Controller with AnyPower™ and PDsafe™ Features Not available
RT7205AProgrammable SMPS and USB Type-C Controller Not available
RT7207USB PD Type-C Controller for SMPS Not available
RT7202Highly Integrated USB PD Type-C Controller for SMPS Not available

What is USB Type-C?

The USB TYPE-C standard has been developed to meet the ever growing needs of connectivity between modern devices. USB TYPE-C connectivity provides both power and data exchange at higher power levels and higher speeds compared to the legacy USB standard. The mechanical design of the USB TYPE-C connector and receptacle has also been improved, to enable smaller form factor and make the connection more user-friendly. Compared to old USB 1.x/2.0 standard, USB Type-C connector is a reversible plug in smaller physical size which supports high data speed up to 10Gbps and up to 100W with power delivery.
Read more for the comparison table of all USB standards from USB 1.x/2.0 standard to USB Type-C in terms of connector type, connection definition, data speed and supporting voltage/current.

Advantages of USB TYPE-C standard

  • USB TYPE-C plug is reversible, so it can be plugged in either way; the pinning is laid out in such a way that power connections will always meet correctly. Since the receptacle has two rows of D+ and D- where the two D+ lines and the two D- lines are connected together so the D+ and D- will always meet-up. The high speed TX lines and RX lines cannot be connected together. Therefore the USB TYPE-C CC lines are used to identify the cable orientation and will configure the TX/RX hardware to work correctly. Diagram below shows USB TYPE-C receptacle and cable plug pinning.
  • Another differences between older USB standard and the new USB TYPE-C standard is the dual role capability: USB TYPE-C cables have identical plugs on either side of the cable, which means that devices connected together have to tell each other who will be acting as host and who will be acting as device. Note that these roles need to be determined for both data and power after connection of the cable: For data transmission, the host is called the Downstream Facing Port (DFP) and the device is called the Upstream Facing Port (UFP). For power, the power provider is the Source and power consumer is the Sink. Some applications can have Dual Roles for Data (DRD) and Dual Role for Power (DRP). The CC lines will be used to define the power role of the two connected devices during connection.
  • Another advantage of the USB TYPE-C system is its higher power capability. Whereas the legacy USB was able to provide 2.5W only, USB TYPE-C is able to provide up to 5V/3A, 15W max, and with Power Delivery, the voltage & current range is increased to 20V/5A for maximum power of 100W. This makes it possible to power larger devices from the USB PD port, like monitors, and also allows charging devices with large battery packs like notebook computers. The new USB PD 3.0 standard also supports Programmable Power Supply (PPS) which allows fine adjustment of the bus voltage and current, and even allows lower voltage than 5V; PPS Vbus can be adjusted down to 3V which is very useful in Direct Charge systems where the Bus voltage is directly connected to the battery for highest efficiency charging. Standard type-C cables are rated for currents up to 3A. For higher currents up to 5A, special E-marked cables need to be used. These cables include an E-mark IC that identifies the cables capability via the CC line. E-mark ICs require a 5V power supply to be applied to the cable VCONN pin via one of the CC wires.
  • The Super Speed + 10Gbps data rate via the TX/RX pairs makes it possible to transfer signals that previously needed dedicated cables, like HDMI / Display Port/Thunderbolt, and allows 4k video to be transferred over USB TYPE-C. HDMI signal transfer via USB TYPE-C cables requires special use of the data transfer pairs in the cable, which is called Alternate Mode.

Read more to find out how USB TYPE-C configures data and power.

Examples of USB TYPE-C applications and related Richtek power management ICs.
Please click each diagram for product details and find design examples here

Technical Documents
TitleLast UpdateShareDownload
Introduction to Richtek USB Type-C Power Delivery Solutions2018/12/18
Switching Battery Chargers2017/10/18
Evaluation Boards
TitleLast UpdateShareDownload
RT1715 Type-C Port Controller Evaluation Board2018/11/08
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