SLVUCA7 September   2021 TPS25859-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Schematic
  4. 3General Configuration and Description
    1. 3.1 Physical Access
    2. 3.2 Adjusting the Switching Frequency
    3. 3.3 Adjusting the Current Limit Value
    4. 3.4 Adjusting the Cable Compensation Value
    5. 3.5 Thermal Management
    6. 3.6 Test Setup
  5. 4Board Layout
  6. 5Bill of Materials

3.2 Adjusting the Switching Frequency

If other frequencies are desired, within the frequency range of 200 kHz to 800kHz, the RFREQ (R6) resistor value can be changed. Consult the TPS25859-Q1 data sheet for proper selection of the RFREQ resistor. Change the inductor (L1) and the total output capacitance for proper control-loop operation. The FREQ/SYNC pin can also be used to synchronize the internal oscillator to an external clock. The TPS25859EVMQ1-161 allows users to synchronize the internal oscillator to both Lo-Z clock source and Hi-Z clock source. See the data sheet for detailed information.