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High-Integration USB PD Controller with Internal Feedback Compensation and Synchronous Rectification for ZVS Control

RT7208EB New Product

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The RT7208EB is a programmable USB PD controller with built-in functions of synchronous rectification, bi- direction control and internal feedback compensation. The controller MCU handles various proprietary protocols via the D+/D- interface and supports USB PD Type-C via the CC1/CC2 pins.

The RT7208EB provides the highly integrated solution for the off-line high power density AC-DC converter by utilizing the zero-voltage switching (ZVS) on main switch. This is accomplished by built-in compensation for feedback control to regulate output voltage and current. In order to reduce usage of external components, the controller is built-in with a synchronous rectification controller, and integrated with diverse functions and protections. These features improve the efficiency as well as the safety of a power converter.

In the IC, an internal synchronous rectifier controller can optimize efficiency and provide safe operation in both continuous-conduction mode (CCM) and discontinuous -conduction mode (DCM) under a wide output voltage range of 3.0V to 22V.

Moreover, a dual operational amplifier with the digital- to-analog converter (DAC) is embedded for voltage- loop and current-loop regulation when programming the constant-voltage (CV) and constant-current (CC) regulation in high precision.

Applications

  • USB PD Type-C or Proprietary Protocols (e.g., FCP, SCP and AFC) Chargers/Adapters for Smart Phones, NBs, Tablets and All Other Electronics
  • USB PD Extension Cores with Offline AC-DC Converters
Key Spec.
RT7208EB
Status Active
Policy Manager Integrated
Alternate Mode No
PD Version PD2.0;PD3.0;PPS
MCU Integrated Yes
Power Role Provider
Data Role DFP
External Power Path Control N-MOSFET Driver
Internal Power Path VCONN 5V 20mA
Iq (Typ) (μA) 925
Realtime VBUS Monitoring Yes
Dead Battery Support No
Max Output Voltage (V) 22
Syn. Rectifier Yes
CC Pins CC1;CC2
VBUS Discharge By BLD
Features Adjustable Current Limit;Constant-Current Regulation;Internal Compensation;OCP;OVP;SCP;UVP;VBUS OVP;VBUS UVP
Package Type WQFN4x5-28
Features
  • Protocol Support
    ► USB PD2.0/PD3.0 and PPS
    ► Proprietary Protocols
  • Highly Integrated
    ► Embedded MCU with an Mask ROM of 32KB, an OTP-ROM of 16KB, and an SRAM of 3KB
    ► Built-in Synchronous Rectifier Controller and Driver
    ► Built-in Charge Pump for a Wide VDD Operation Range of 3V to 22V
    ► Built-in Bi-direction Function for Programmable Constant-Voltage and Constant-Current Control
    ► Built-in Internal Feedback Compensation
    ► Built-in Dual Shunt Regulators with Respectively 11-bit and 10-bit DAC Programmable Reference Voltages for CV and CC Control
    ► Built-in 10-bit Analog-to-Digital Converter (ADC)
    ► Programmable Linear Cable Compensation
    ► BLD Pin for Quick Discharge of Output Capacitor
    ► VBUS Pin for Detection VBUS Voltage and Quick Discharge of VBUS Capacitor
    ► USBP Pin for Direct Drive of External Blocking N-MOSFET
    ► Power-Saving Mode in Standby Mode
  • Protection
    ► Adaptive Output Over-Voltage Protection
    ► Adaptive Under-Voltage Protection
    ► CC1/CC2/D+/D- Over-Voltage Protection
    ► Firmware-Programmable Constant-Current Protection
    ► Firmware-Programmable Over-Current Protection
    ► Firmware-Programmable Over-Temperature Protection
Datasheet
TitleLast UpdateShareDownload
High-Integration USB PD Controller with Internal Feedback Compensation and Synchronous Rectification for ZVS Control2021/09/30
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