SNVU796 March   2022 TPSM82901 , TPSM82902 , TPSM82903

 

  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 Configurable Enable Threshold Voltage
      3. 1.2.3 SS/TR Capacitor
      4. 1.2.4 Feedforward Capacitor
      5. 1.2.5 MODE/S-CONF Resistor
  3. 2Setup
    1. 2.1 Input/Output Connector Descriptions
  4. 3Safety Instructions
  5. 4Test Results
  6. 5 Board Layout
  7. 6Schematic and Bill of Materials
    1. 6.1 Schematic
    2. 6.2 Bill of Materials

2.1 Input/Output Connector Descriptions

    J2, Pin 1 and 2 – VINPositive input connection from the input supply for the EVM
    J2, Pin 3 and 4 – S+/S-Input voltage sense connections. Measure the input voltage at this point.
    J2, Pin 5 and 6 – GNDReturn connection from the input supply for the EVM
    J3, Pin 1 and 2 – VOUTOutput voltage connection
    J3, Pin 3 and 4 – S+/S-Output voltage sense connections. Measure the output voltage at this point.
    J3, Pin 5 and 6 – GNDOutput return connection
    J4 – PG/GNDThe PG output is on pin 1 of this header with a convenient ground on pin 2.
    J5 – TRACK-IN/SS/TR/GNDBy removing C12, the IC tracks an externally applied voltage. Apply the voltage on pin 1 to scale the applied voltage through R8 and R9. The SS/TR voltage can be measured on pin 2.
    JP1 – PG Pullup VoltagePG pin pullup voltage jumper. Place the supplied jumper on JP1 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 18 V.
    JP2 – ENEN pin input 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. Remove the jumper to set a configurable enable threshold voltage with R3 and R4.
    JP3 – MODE/S-CONFMODE/S-CONF pin input jumper. Place the supplied jumper across PWM and MODE/S-CONF to operate the IC in forced PWM mode. Place the jumper across PFM/PWM and MODE/S-CONF to operate the IC in auto PFM/PWM mode. Remove the jumper to operate the IC with the MODE/S-CONF settings set by R7.
    Note: If it is desired to change between PWM and PFM/PWM modes during operation, JP3 must be set to either PWM or PFM/PWM before enabling the IC.