SLVUC06 October   2020 TPS650320-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2EVM Configurations
    1. 2.1 Requirements
    2. 2.2 Operation Instructions
    3. 2.3 Configuring the USB to I2C Adapter
    4. 2.4 Regulator Input Supplies and Features
      1. 2.4.1 Buck 1 Input Supply
      2. 2.4.2 Mid-Vin Buck1 Features
      3. 2.4.3 Buck 2 Input Supply
      4. 2.4.4 Buck 3 Input Supply
      5. 2.4.5 Low-Vin Buck2 and Buck3 Features
      6. 2.4.6 Low Noise LDO Input Supply
      7. 2.4.7 Low Noise LDO Features
    5. 2.5 Selecting the Logic Supply Voltage
  4. 3Test Points
    1. 3.1 Voltage Test Points
  5. 4Graphical User Interface
    1. 4.1 TPS650320-Q1 EVM Debugging
      1. 4.1.1 I2C Communication Port and Adapter Debugging
      2. 4.1.2 Updating MCU Firmware
    2. 4.2 Navigating the GUI
      1. 4.2.1 Home
      2. 4.2.2 Block Diagram
      3. 4.2.3 Registers
      4. 4.2.4 Device Configuration
        1. 4.2.4.1 Using Device Configuration to Define Spin Settings
        2. 4.2.4.2 Configuring the Power Sequence
    3. 4.3 Re-Program PMIC
    4. 4.4 In-Circuit Programming
  6. 5Typical Performance Plots
    1. 5.1 Power Sequence Plots
    2. 5.2 Load Transient Plots
    3. 5.3 Output Voltage Ripple Plots
    4. 5.4 Efficiency Plots
    5. 5.5 LDO Output Noise
  7. 6TPS650320-Q1 EVM Schematic
  8. 7TPS650320-Q1 EVM PCB Layers
  9. 8TPS650320-Q1 EVM Bill of Materials

2.3 Configuring the USB to I2C Adapter

An onboard MCU acts as a USB adapter to the PMIC. This adapter allows I2C communication to the host PC as well as GPIO assertion and monitoring. By default, the onboard adapter is powered by the USB cable through an onboard dedicated 3.3 V LDO (U4). Additional configurations are allowed by reconfiguring jumpers J18 and J19, shown in Table 2-1 and Table 2-2. The onboard adapter must have power applied through a valid configuration.

Table 2-1 Adapter Power Source (J18)
Selection Jumper PinAdapter Supply Bus
Pin 1 (PMIC Buck 1 Output)Pin 2 (Adapter Input Supply Rail)
Pin 3 (PMIC LDO Output)Pin 4 (Adapter Input Supply Rail)
Pin 5 (Dedicated 3.3 V LDO Output - Default)Pin 6 (Adapter Input Supply Rail)
Table 2-2 Dedicated LDO Supply for Adapter (J19)
Selection Jumper PinDedicated 3.3 V LDO Supply Bus
Pin 1 (PMIC Buck 1 Output)Pin 2 (Dedicated 3.3 V LDO Input Rail)
Pin 3 (PMIC Buck 1 Input)Pin 4 (Dedicated 3.3 V LDO Input Rail)
Pin 5 (VBUS Rail - Default)Pin 6 (Dedicated 3.3 V LDO Input Rail)

The following Jumpers in Table 2-3 connect the USB adapter to PMIC functional pins. These can be disconnected for flexibility.

Table 2-3 Adapter PMIC Connections
JumperPMIC Pin
J20nINT
J21nRST
J22SEQ
J23GPIO