SLVU251B June   2008  – February 2022 TPS51220

 

  1.   Trademarks
  2. 1Description
  3. 2Electrical Performance
  4. 3Schematic
  5. 4Test Setup and Procedure
    1. 4.1 Test Setup
    2. 4.2 Test Procedure
  6. 5Configuration
    1. 5.1 Switching Frequency Selection
    2. 5.2 Skip Mode and Control Scheme Selection
    3. 5.3 Current-Sensing Selection
    4. 5.4 Overcurrent Limit and Discharge Selection
    5. 5.5 Control Mode and Protection Selection
    6. 5.6 Soft-Start Setting Selection
    7. 5.7 Output Voltage Adjustment
  7. 6Bill of Materials
  8. 7EVM Assembly Drawing and PCB Layout
  9. 8Reference
  10. 9Revision History

4.2 Test Procedure

  1. Ensure that the switches S1 (EN1), S2 (EN2), and S3 (EN) are in OFF position.
  2. Ensure that the shunt jumpers for JP1 (TRIP) is set 7-pin to 8-pin (VREG5; Vocl = 60 mV, Discharge-enabled), JP2 (FUNC) is set 1-pin to 2-pin (GND; UVP/OVP-enabled), and JP3, JP4 are set 3-pin to 4-pin (VREF2; Auto-skip).
  3. Apply appropriate VIN voltage to VIN and GNDI terminals. Check that VREG3 (3.3V-LDO) starts up.
  4. Turn S3 (EN) to ON. Check that VREG5 (5V-LDO) and VREF2 (2V-Ref) start up.
  5. When S1 (EN1) is turned to ON, CH1-output starts up.
  6. When S2 (EN2) is turned to ON, CH2-output starts up.