SLVUC22 July   2021 TPS62912 , TPS62913

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 EVM Features and Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Enable Level Shifter and Adjustable Threshold Voltage
      3.      Power Good Level Shifter
      4. 1.2.3 NR/SS Capacitor
      5. 1.2.4 Feedforward Capacitor
      6. 1.2.5 S-CONF Resistor
      7. 1.2.6 Loop Response Measurement
      8. 1.2.7 Single LC Filter Operation
  3. 2Setup
    1. 2.1 Input/Output Connector Descriptions
    2. 2.2 Ripple Measurement
  4. 3Test Results
  5. 4Board Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
  7. 6Bill of Materials

1.2.1 Input and Output Capacitors

C1 is provided for an additional input capacitor. This capacitor is not required for proper operation but can be used to reduce the input voltage ripple and is included on the EVM since long lead wires are typically used for evaluation. In an actual implementation, this bulk input capacitor is usually not needed.

For an inverting buck-boost configuration, the crossover frequency of the loop must be ~4x or more below the RHP zero. C12 is provided for an additional bulk output capacitor. These capacitors are not required for proper operation but can be used to reduce the crossover frequency. C13 and C18 are provided for high-frequency bypass capacitors.