SLVUCB0A September   2021  – November 2022 TPSM82864A , TPSM82866A

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Performance Specification
    2. 1.2 Modifications
      1. 1.2.1 Input and Output Capacitors
      2. 1.2.2 Feedforward Capacitor
      3. 1.2.3 VSET/MODE Resistor
      4. 1.2.4 Loop Response Measurement
  4. 2Setup
    1. 2.1 Setup
    2. 2.2 Input, Output Connector and Jumper Descriptions
  5. 3Safety Instructions
  6. 4Test Results
  7. 5Board Layout
  8. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  9. 7Revision History

2.2 Input, Output Connector and Jumper Descriptions

J1 – VIN/GND Input and return connections from the input supply for the EVM.

This connector supports currents over 3 A and accepts up to 16 AWG wire.
J2 – VOUT/GND Input and return connections from the EVM to the load.

This connector supports currents over 3 A and accepts up to 16 AWG wire.
J3 – PG/GND The PG output appears on pin 2 of this header with ground on pin 1.
J4, Pin 1 and 2 – VIN Positive input connection from the input supply for the EVM

Do not use for currents above 3 A.
J4, Pin 3 and 4 – S+/S– Input voltage sense connections. Measure the input voltage at this point.
J4, Pin 5 and 6 – GND Input return connection from the input supply for the EVM.

Do not use for currents above 3 A.
J5, Pin 1 and 2 – VOUT Output voltage connection

Do not use for currents above 3 A.
J5, Pin 3 and 4 – S+/S– Output voltage sense connections. Measure the output voltage at this point.
J5, Pin 5 and 6 – GND Output return connection

Do not use for currents above 3 A.
JP1 – EN EN pin input jumper. Place the supplied jumper across ON and EN to turn on the module. Place the jumper across OFF and EN to turn off the module.
JP2 – PG Pullup Voltage PG pin pullup voltage jumper. Place the supplied jumper on JP2 to connect the PG pin pullup resistor to VOUT. 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.
JP3 – VSET/MODE VSET/MODE pin input jumper. Place the supplied jumper across PWM and VSET/MODE to operate the IC in Forced PWM mode. Place the jumper across PFM/PWM and VSET/MODE to operate the IC in Auto PFM/PWM mode. Remove the jumper to operate the IC with a fixed output voltage, which is set by R4.

For the fixed output voltage configuration, R4 must be installed, R2 removed, and R1 shorted.