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

3 Background

The EVM is setup to allow the user to evaluate the performance of the TPS548B27 IC, and easily make changes to multiple settings. The low drain-to-source on resistance of the MOSFETs allows the device to achieve high efficiencies and keep the junction temperature low at high output currents. There is no need for external compensation components since this device is designed with D-CAP3™ control topology. On the EVM, the switching frequency and the operation mode are externally selectable using a jumper to set the resistor from the MODE pin to AGND. An external resistor divider allows for an adjustable output voltage. Additionally, the device provides adjustable soft start, adjustable OC limit threshold, external reference input, and an open-drain power good indicator. Lastly the TPS548B27 device has a fixed internal VIN under voltage lockout and externally adjustable UVLO using a resistor divider at the EN pin.

Table 3-1 Input Voltage and Output Current Summary
EVM Input Voltage Range Output Current Range
TPS548B27 VIN = 4 V to 16 V 0 A to 20 A