SLUUCS7 april   2023 TPSM843A26

 

  1.    TPSM843A26EVM 16-A, Regulator Evaluation Module
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Background
    2. 1.2 Before You Begin
    3. 1.3 Performance Characteristics Summary
  4. 2Configurations and Modifications
    1. 2.1 Output Voltage
    2. 2.2 Switching Frequency (FSEL Pin)
    3. 2.3 Current Limit, Soft-Start Time, and Internal Compensation (MSEL Pin)
    4. 2.4 Enable, UVLO (EN Pin)
  5. 3Test Setup and Results
    1. 3.1 Input and Output Connections
    2. 3.2 Efficiency
    3. 3.3 Output Voltage Regulation
    4. 3.4 Load Transient and Loop Response
    5. 3.5 Input Voltage Ripple
    6. 3.6 Start-up and Shutdown with EN
    7. 3.7 Start-up and Shutdown with VIN
    8. 3.8 Start-up Into Pre-Bias
    9. 3.9 Thermal Performance
  6. 4Board Layout
    1. 4.1 Layout
  7. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials

2.2 Switching Frequency (FSEL Pin)

Jumper J3 can be used to set the switching frequency mode of the device. Shorting pins 1 and 2 allows the user to synchronize the switching frequency with an external clock. Shorting pins 3 and 4 sets the frequency through a resistor to ground. Jumper J4 can be used to select between the switching frequency options shown in Table 2-2. If the desired option is not available, change one of the resistors to the value which sets the desired option.

Table 2-2 FSEL Selection
JUMPER J4 SETTINGFSEL RESISTORSWITCHING FREQUENCY
1 to 2 pin shorted24.3 kΩ500 kHz
3 to 4 pin shorted17.4 kΩ750 kHz
5 to 6 pin shorted(1)11.8 kΩ1000 kHz
7 to 8 pin shorted8.06 kΩ1500 kHz
9 to 10 pin shorted4.99 kΩ2200 kHz
(1) Default Setting