SLUU340A February   2009  – January 2022 TPS51123

 

  1. 1Introduction
    1.     Trademarks
  2. 2Performance Specification Summary
  3. 3Schematic
  4. 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
  5. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Operation Mode Selection
  6. 6Physical Layouts
  7. 7List of Materials
  8. 8References
  9. 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 245 kHz for CH1 and 305 kHz for CH2.

Table 5-1 Switching Frequency Selection
TONSEL CONNECTION SWITCHING FREQUENCY (kHz)
CH1 CH2
GND (SLOW) 200 250
VREF (MED1) 245 305
VREG3 (MED2) 300 375
VREG5 (FAST) 365 460