SLVUBJ9A July   2020  – October 2020 TPS54JB20

 

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1.3.1 Output Voltage Setpoint

To change the output voltage of the EVM, it is necessary to change the value of resistor R6 and R7. R9 is fixed at 10 kΩ. Changing the total value of R6 plus R7 can change the output voltage above the 0.9-V reference voltage VINTREF. A two resistor configuration of R6 + R7 is implemented to give the exact desired output voltage setting. The value of R6 and R7 for a specific output voltage can be calculated using Equation 1.

Equation 1. GUID-2AD081AD-6E6B-49AB-BA4B-EDA270D8B0D3-low.gif

where

  • VINTREF = 0.9 V
  • RFB_HS = R6+ R7
  • RFB_LS = R9 = 10 kΩ