SLUU240B January   2006  – March 2022 TPS51120

 

  1.   Trademarks
  2. 1Description
  3. 2Electrical Performance
  4. 3Schematic
  5. 4Test Setup and Results
    1. 4.1 Test Setup
    2. 4.2 Test Procedure
    3. 4.3 Start-Up Performance
    4. 4.4 Transient Performance
  6. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Skip Mode and Faults Disable Selection
    3. 5.3 Output Voltage Setting Selection
    4. 5.4 Control Scheme Selection
  7. 6EVM Assembly Drawing and PCB Layout
  8. 7List of Materials
  9. 8References
  10. 9Revision History

5.1 Switching Frequency Selection

The switching frequency can be set by the TONSEL pin using JP1 on the EVM. The default setting is Medium2.

Table 5-1 Switching Frequency Selection
Jumper (JP1) Set to Frequency(1)
TYP CH1 CH2
Top (1-2 pin shorted) Slow 180 kHz 270 kHz
2nd (3-4 pin shorted) Medium1 220 kHz 330 kHz
3rd (5-6 pin shorted) Medium2 280 kHz 430 kHz
Bottom (7-8 pin shorted) Fast 380 kHz 580 kHz
(1) Frequencies are approximate.