SLVUC40 May   2021 TPS629210-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Performance Specification
  4. 3EVM Configuration and Modification
    1. 3.1 Input and Output Capacitors
    2. 3.2 Configurable Enable Threshold Voltage
    3. 3.3 MODE/S-CONF Setting
    4. 3.4 Power Good
    5. 3.5 Power Good Pull Up Voltage
    6. 3.6 Feedforward Capacitor Option
    7. 3.7 Output Voltage Setting
    8. 3.8 Loop Response Measurement
  5. 4EVM Test Set Up
    1. 4.1 Input and Output Connectors
    2. 4.2 Jumper Configuration
      1. 4.2.1 JP1 Enable
      2. 4.2.2 JP2 MODE/S-CONF
      3. 4.2.3 JP3 Power Good
      4. 4.2.4 JP4 PG Pull Up Voltage
  6. 5Test Results
  7. 6Board Layout
  8. 7Schematic and Bill of Materials
    1. 7.1 Schematic
    2. 7.2 Bill of Materials
  9. 8References

3.3 MODE/S-CONF Setting

JP2 is used to set different MODE/S-CONF configurations. MODE/S-CONF can be connected to VIN and GND as a traditional HIGH or LOW level. R6 and R7 select the other device configurations including internal/external feedback, switching frequency, output discharge, Auto PFM or Forced PWM options. The values of R6 and R7 can be changed per user’s requirement.

  • While using the internal feedback (VSET) configuration for the output voltage setting, either float the FB pin by cutting the net tie (NT1) included on the back of the board or remove both R1 and R2 for 3.3-V output voltage. Other output voltage can be programmed by removing R1 and changing the value of R2. Ensure the JP2 jumper is removed for proper operation with internal feedback.
    WARNING: Ensure not to set the MODE pin for external feedback if either the net tie (NT1) is cut or R1 and R2 are removed. This could cause damage to the device due to lack of external feedback control.
  • Dynamic mode option is an advance feature which allows MODE pin to actively switch between Forced PWM and Auto PFM/PWM during operation, but this is only possible by driving the mode pin between Vin and GND. This feature provides user with the option of controlling when/if the device enters power save mode (DCM).