SLVSEW8B August   2019  – December 2019 TPS66020 , TPS66021

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Function Table
      1.      TPS6602x Block Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Recommended Supply Load Capacitance
    5. 6.5  Thermal Information
    6. 6.6  PP5V Power Switch Characteristics
    7. 6.7  PPHV Power Switch Characteristics
    8. 6.8  Power Path Supervisory
    9. 6.9  VBUS LDO Characteristics
    10. 6.10 Thermal Shutdown Characteristics
    11. 6.11 Input-output (I/O) Characteristics
    12. 6.12 Power Consumption Characteristics
    13. 6.13 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 5-V Source (PP5V Power Path)
        1. 8.3.1.1 PP5V Current Limit
        2. 8.3.1.2 PP5V Reverse Current Protection (RCP)
      2. 8.3.2 20-V Sink (PPHV Power Path)
        1. 8.3.2.1 PPHV Soft Start
        2. 8.3.2.2 PPHV Reverse Current Protection (RCP)
      3. 8.3.3 Overtemperature Protection
      4. 8.3.4 VBUS Overvoltage Protection (OVP)
      5. 8.3.5 Power Management and Supervisory
        1. 8.3.5.1 Supply Connections
        2. 8.3.5.2 Power Up Sequences
          1. 8.3.5.2.1 Normal Power Up
          2. 8.3.5.2.2 Dead Battery Operation
    4. 8.4 Device Functional Modes
      1. 8.4.1 State Transitions
        1. 8.4.1.1 DISABLED State
        2. 8.4.1.2 SRC 1.5-A State
        3. 8.4.1.3 SRC 3-A State
        4. 8.4.1.4 SNK State
        5. 8.4.1.5 FRS (Fast Role Swap) State
      2. 8.4.2 SRC FAULT State
      3. 8.4.3 SNK FAULT State
      4. 8.4.4 Device Functional Mode Summary
      5. 8.4.5 Enabling the PP5V Source Path
      6. 8.4.6 Enabling the PPHV Sink Path
      7. 8.4.7 Fast Role Swap (FRS)
        1. 8.4.7.1 Overview
        2. 8.4.7.2 Fast Role Swap Use Cases
        3. 8.4.7.3 Fast Role Swap Sequence
      8. 8.4.8 Faults
        1. 8.4.8.1 Fault Types
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 External Current Reference Resistor (RIREF)
        2. 9.2.2.2 External VLDO Capacitor (CVLDO)
        3. 9.2.2.3 PP5V Power Path Capacitance
        4. 9.2.2.4 PPHV, VBUS Power Path Capacitance
        5. 9.2.2.5 VBUS TVS Protection (Optional)
        6. 9.2.2.6 VBUS Schottky Diode Protection (Optional)
        7. 9.2.2.7 VBUS Overvoltage Protection (Optional)
        8. 9.2.2.8 Dead Battery Support
        9. 9.2.2.9 Fast Role Swap (FRS) (Optional)
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.4 VBUS Overvoltage Protection (OVP)

TPS6602x supports overvoltage protection on the VBUS terminal. When the voltage detected on OVP exceeds a set level, the PPHV power path will automatically be disabled (if enabled), and will remain disabled until the OVP event is removed. FLT is asserted when an overvoltage event occurs. The VBUS OVP threshold may be set using a resistor divider from VBUS to GND, whose divider output is connected to the OVP terminal as shown in Figure 11. Table 1 shows resistor divider settings for common USB Power Delivery fixed voltage supply contracts along with the resulting nominal OVP thresholds. These thresholds may be adjusted based on desired margins for a given application. If VBUS OVP is not required or needs to be disabled, the OVP terminal may be tied or driven to GND as shown in Figure 12. Lastly, as one example implementation, the OVP threshold may be controlled dynamically using outputs from a PD controller or microcontroller as shown in Figure 13. By selecting each output, different VBUS OVP threshold settings are possible.

TPS66020 TPS66021 fig_vbus_ovp_external.gifFigure 11. VBUS OVP Threshold Set by External Resistor Divider

Table 1. Typical External Resistor Divider Settings

PD Fixed Contract R1, kΩ R2, kΩ Nominal VBUS OVP Threshold, V
5 V 102 20 6.1
9 V 182 20 10.1
15 V 309 20 16.5
20 V 432 20 22.6
TPS66020 TPS66021 fig_vbus_ovp_disable.gifFigure 12. VBUS OVP Disabled
TPS66020 TPS66021 fig_vbus_ovp_external_multi.gifFigure 13. Selectable VBUS OVP Thresholds