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USB Type-C DFP with Charging Port Controller and Integrated 36V 3.5A Synchronous Buck Converter

RTQ2115C-QA

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The RTQ2115C combines a USB Type-C Downstream Facing Port (DFP) controller, charging port controller, USB 2.0 high-speed data line (D+/D-) switch and a 3.5A synchronous buck converter.

The RTQ2115C monitors the Type-C Configuration Channel (CC) lines to detect an Upstream Facing Port (UFP) device attach event, then turns on external VBUS MOSFET to apply power to VBUS and communicates the selectable VBUS current sourcing capability.

The RTQ2115C provides the electrical signatures on D+/D- to support charging schemes compatible with the USB 2.0 Battery Charging Specification BC1.2 and Chinese Telecommunication Industry Standard YD/T 1591-2009. Auto-detect mode is also integrated which supports USB 2.0 Battery Charging Specifica­tion BC1.2 Dedicated Charging Port (DCP), Divider 3 mode and 1.2V shorted mode to comply with the legacy fast charging mode of mobile devices.

The RTQ2115C integrates a high efficiency, monolithic synchronous buck converter that can deliver up to 3.5A output current from a 3V to 36V wide range input supply and is protected from load-dump transients up to 42V.

The RTQ2115C has constant current control to achieve adjustable USB current limit and implement the current sense signal for adjustable USB power output voltage with load line compensation. The converter includes optional spread-spectrum frequency modulation to overcome EMI issue and complete protection for safe and smooth operation in all applied conditions. Protection features include cycle-by-cycle current limit for protection against shorted outputs, soft-start control to eliminate input current surge during start-up, input under-voltage lockout, output under-voltage protection, output over-voltage protection and over-temperature protection.

The RTQ2115C is fully specified over the temperature range of TJ = -40°C to 125°C and available in WET-WQFN-40L 6x6.

The RTQ2115C can be used to support Type-C connectors including the Type C-to-C dongle and the Type C-to-B dongle. Type-A connector support is provided by the RTQ2115C.

Applications

  • Automotive Car Chargers
  • USB Power Chargers
Key Spec.
RTQ2115C-QA
Status Active
MCU Integrated No
Power Role Provider
Data Role DFP
Iq (Typ) (μA) 150
Features Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Constant-Current Regulation;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;OCP;Power Good;UVP
Package Type WET-WQFN6x6-40
Features
  • USB Type-C DFP Controller
    ► Connector Attach/Detach Detection
    ► STD/1.5A/3A Capability Advertisement on CC
    ► Cable Polarity Determination
    ► VCONN with Current Limit
    ► CC Pin OVP Protection
  • USB Charging Port Controller
    ► Support D+/D- SDP/CDP/DCP Modes per USB BC1.2
    ► Support D+/D- Shorted Mode per Chinese Telecommunication Industry Standard YD/T 1591-2009
    ► Support Automatic Selection Mode for D+/D- Shorted / Divider 3 / 1.2V Mode
  • 36V 3.5A Synchronous Buck Converter
    ► 3V to 36V Input Voltage Range
    ► 3.5A Continuous Output Current
    ► CC/CV Mode Control
    ► Adjustable and Synchronizable Switching Frequency : 300kHz to 2.2MHz
    ► Selectable PSM/PWM at Light Load
    ► Adjustable Soft-Start
    ► Adjustable USB Power Output Voltage between 5V and 5.5V with Load Line Compensation
    ► Optional Spread-Spectrum Frequency Modulation for EMI Reduction
  • Power Good Indicator
  • Enable Control
  • Built-in Gate Driver to Turn on External Power MOSFET on VBUS
  • USB 2.0 480Mbps Data Switches
  • Auto-Discharge VBUS when CC Pins Detach
  • Support Mode Change Among SDP/CDP/DCP Auto
  • ±8kV HBM on CC1/CC2/DS+/DS-
  • Over-Temperature Protection
  • Cycle-by-Cycle Over-Current Limit Protection
  • Input Under-Voltage Protection
  • VBUS Over-Voltage Protection
  • Adjacent Pin-Short Protection
  • AEC-Q100 Grade 1 Qualified
  • -40°C to 125°C Operating Ambient Temperature
  • DS+/DS- OVP
Datasheet
TitleLast UpdateShareDownload
USB Type-C DFP with Charging Port Controller and Integrated 36V 3.5A Synchronous Buck Converter2020/08/04
Technical Documents
TitleLast UpdateShareDownload
Richtek Selection Guide [Oct., 2020]2020/12/30
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