SLVUC35A May   2021  – August 2021 TPS25946

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 EVM Applications
  3. 2Description
  4. 3Schematic
  5. 4General Configurations
    1. 4.1 Physical Access
    2. 4.2 Test Equipment and Set up
      1. 4.2.1 POWER SUPPLIES
      2. 4.2.2 METERS
      3. 4.2.3 OSCILLOSCOPE
      4. 4.2.4 LOADS
  6. 5Test Setup and Procedures
    1. 5.1 Hot Plug Test
    2. 5.2 Startup With a Combination of Capacitive and Resistive Loads
    3. 5.3 Power-Up into Short Test
    4. 5.4 Overvoltage Lockout Test
    5. 5.5 Transient Overload Performance
    6. 5.6 Overcurrent Test
    7. 5.7 Output Hot Short Test
    8. 5.8 USB On-The-Go (OTG) Performance
  7. 6EVAL Board Assembly Drawings and Layout Guidelines
    1. 6.1 PCB Drawings
  8. 7Bill Of Materials (BOM)
  9. 8Revision History

5.8 USB On-The-Go (OTG) Performance

Use the following instructions to observe USB On-The-Go (OTG) performance:

  1. Set the input supply voltage to 5 V and current limit of 10 A. Apply the supply between VOUT and PGND at connector J2.
  2. Connect a load of 200 mA between VIN and PGND at connector J1.
  3. Turn on the input power supply at the connector J2.
  4. Enable the eFuse by applying 1.5 V externally between TP4 and GND. This external power supply is not required if the EN/UVLO set point is above the voltage between TP1 and PGND before the device geting enabled, which is the difference between the input supply at J2 and the voltage drops across R1 and D1.
  5. Note that if the Power Good (PG) signal is required to observe during this OTG mode of operation with 5-V input, the resistor R8 needs to be changed to 360 kΩ.
Figure 5-14 shows the schematic to evaluate USB On-The-Go (OTG) port protection performance of TPS25946x eFuse.

Figure 5-15 shows the power-up of TPS25946x eFuse during USB On-The-Go (OTG) mode.

GUID-20210428-CA0I-R54Q-KVM1-PZ7GNVQSZVLW-low.gif Figure 5-14 Schematic to Evaluate USB On-The-Go (OTG) Port Protection Performance of TPS25946x eFuse
GUID-20210424-CA0I-0TP9-ZCB7-BZMRVGTMNDZH-low.gif Figure 5-15 Power-Up of TPS25946 eFuse During USB On-The-Go (OTG) Mode (VSYSTEM = 5 V, IBUS = 0.2 A, CdVdt = OPEN)