SNVU759 July   2021 TPS548B27

 

  1.   Trademarks
  2. 1Introduction
  3. 2Safety Warnings
  4. 3Background
  5. 4Performance Specification Summary
  6. 5Modifications
    1. 5.1 Output Voltage Setpoint
    2. 5.2 Frequency and Operation Mode Setting
    3. 5.3 Enable Pin Selection
    4. 5.4 Remote Sensing
    5. 5.5 Adjustable UVLO
  7. 6Schematic
  8. 7List of Materials
  9. 8Layout

5.2 Frequency and Operation Mode Setting

To change the frequency and operation mode of the part, the MODE pin is used. J4 and the surrounding circuitry allows for an easy change to the frequency and operation mode setting. Table 5-1 shows all 6 options offered by J4.

Table 5-1 TPS548B27EVM Mode Pin Selection
Switching Frequency (FSW)Operation Mode Under Light LoadMode Pin Connections
ConnectionJumper Setting
600 kHzSkip ModeShort to VCCShort Pins 1 and 2
800 kHzSkip Mode243 kΩ ±10% to AGNDShort Pins 3 and 4
1000 kHzSkip Mode121 kΩ ±10% to AGNDShort Pins 5 and 6
1000 kHzForced CCM60.4 kΩ ±10% to AGNDShort Pins 7 and 8
800 kHzForced CCM30.1 kΩ ±10% to AGNDShort Pins 9 and 10
600 kHzForced CCMShort to AGNDShort Pins 11 and 12