SLVUBE9A March   2018  – June 2021 TPS62148

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Soft-Start Time
      3. 1.2.3 Configurable Tracking Voltage
      4. 1.2.4 Configurable Enable Threshold Voltage
      5. 1.2.5 Loop Response Measurement
  3. 2Setup
    1. 2.1 Connector Descriptions
    2. 2.2 Hardware Setup
  4. 3TPS62148EVM-034 Test Results
  5. 4Board Layout
  6. 5Schematic and Bill of Materials
    1. 5.1 Schematic
    2. 5.2 Bill of Materials
  7. 6Revision History

2.1 Connector Descriptions

J1, Pin 1 and 2 – VINPositive input voltage connection from the input supply for the EVM.
J1, Pin 3 and 4 – S+/S–Input voltage sense connections. Measure the input voltage at this point.
J1, Pin 5 and 6 – GNDInput return connection from the input supply for the EVM.
J2, Pin 1 and 2 – VOUTPositive output voltage connection.
J2, Pin 3 and 4 – S+/S–Output voltage sense connections. Measure the output voltage at this point.
J2, Pin 5 and 6 – GNDOutput return connection.
J3 – SS/TR/GNDThe SS/TR pin voltage appears on pin 1 of this header with a convenient ground on pin 3.
J3 – TRACK-INThe TRACK-IN pin can be used to scale down a tracking-voltage.
J4 – PG/GNDThe PG output appears on pin 1 of this header with a convenient ground on pin 2.
JP1 – ENEN pin jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper across OFF and EN to turn off the IC.
JP2 – MODEMode pin jumper. Place the supplied jumper across PWM and MODE to operate the converter in a forced PWM mode. Placed the jumper across MODE and PFM to operate the converter in power-saving mode.
JP3 – FSELFSEL pin jumper. Place the supplied jumper across LOW and FSEL to operate the IC at a reduced switching frequency of nominally 1.25MHz. Place the jumper across HIGH and FSEL to operate the IC at the full switching frequency of nominally 2.5MHz.
JP4 – PG Pullup VoltagePG pin pullup voltage jumper. Place the supplied jumper on JP4 to connect the PG pin pullup resistor to the output voltage. Alternatively, the jumper can be removed and a different voltage can be supplied on pin 1 to pull up the PG pin to a different level. This externally applied voltage must remain below 6 V.