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

4.4 In-Circuit Programming

The TPS650320-Q1 EVM demonstrates the in-circuit programming capabilities of the TPS650320-Q1 PMIC in a typical application. This section provides an example in-circuit programming procedure with application considerations.

  1. Verify the desired power and sequence settings using the GUI's Sequencing Overview tools. See Section 4.2.4.2.
  2. Validate the settings with the BOOSTXL-TPS65033. This socketed board provides a quicker way to evaluate device settings.
  3. Configure the TPS650320-Q1 EVM for a typical camera application once the follwoing settings are verified and validated:
    1. Ensure the I2C pull-up jumpers (J24 and J34) are populated.
    2. Supply the PMIC VIO with either the Buck 1 or Buck 2 output. See Selecting the Logic Supply Voltage.
    3. Tie the PMIC Buck 1 input to VSYS. See Section 2.4.1.
    4. Supply the PMIC Buck 2, Buck 3, and LDO with the Buck 1 output. See Section 2.4.
  4. Apply a Buck 1 input voltage (typical is 12 V) to power up the device. By default, the Buck 1 and Buck 2 regulators are enabled, allowing the 3.3 V and 1.8 V rails to power up.
    1. In a typical camera application, this may be sufficient to power up the serializer and enable PMIC programming over the Serializer-Deserializer (SerDes) back-channel.
    2. If additional rails are required, assert SEQ (S1) to enable the Buck 3 and LDO regulators.
  5. Unlock the configuration and control registers.
  6. Re-program the PMIC settings. If changing a regulator output voltage, TI recommends disabling the regulator first. If doing this in an application setting shuts down a critical component, change the output voltage in small steps to prevent triggering under or over-voltage fault handling.
  7. If the device configuration Cyclic Redundancy Check (CRC) is enabled, calculate and write the new configuration CRC by running the GUI's built-in script. For more information on the GUI's capabilities for programming automation, see the BOOSTXL-TPS65033 User's Guide.
    GUID-20201002-CA0I-DZML-CTTR-TSTQXSKH3SNP-low.png Figure 4-13 GUI Configuration CRC Script
  8. Burn the final PMIC register settings to EEPROM.
  9. Validate the settings on subsequent startups.