SNVU760 February   2021

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Related Documentation
    2. 1.2 TPS3704x-Q1 Applications
  3. 2Schematic, Bill of Materials, and Layout
    1. 2.1 TPS3704Q1EVM Schematic
    2. 2.2 TPS3704Q1EVM Bill of Materials
    3. 2.3 Layout and Component Placement
    4. 2.4 Layout
  4. 3EVM Connectors
    1. 3.1 EVM Test Points
    2. 3.2 EVM Jumpers
  5. 4EVM Setup and Operation
    1. 4.1 Supply Voltage (VDD)
    2. 4.2 Monitoring Input Voltage
    3. 4.3 Default Reset Outputs (RESET1 and RESET2)
    4. 4.4 Optional Reset Output (RESET3)
  6. 5Revision History

4 EVM Setup and Operation

This section describes the functionality and operation of the TPS3704Q1EVM. Refer to the TPS3704x-Q1 datasheet for details on the electrical characteristics of the device.

The TPS3704Q1EVM comes pre-populated with the TPS37044A7OHDDFRQ1 meaning the device is capable of monitoring four seperate voltage rails and outputting two active low RESET signals. The EVM is capable of many different configurations in order to fully evaluate the functionality of all the TPS3704x-Q1 device variants. The default configuration of the EVM is as follows:

  • Jumpers J1 through J4 will be left open while J5 through J8 will be in the Fixed VIN position for direct monitoring of the input voltage.
  • Jumpers J9 and J10 will be in the left position to allow RESET1 and RESET2 to pull up to VDD. J11 will be open because the default configuration does not support RESET3.
  • Jumper J12 will be open connecting TP4 directly to SENSE4 input pin of the device.
  • Jumpers J13 through J16 will be open. Shunt these jumpers to connect high frequency bypass capaitors in parallel with the desired input line.

The TPS3704Q1EVM comes populated with 2:1 resistor dividers on each of the input lines. The user must choose appropriately sized resistors such that the divided voltage is within the voltage window of the sense pin to be used. Consult the Device Threshold Table in the datasheet to ensure proper resistor values.

The TPS3704Q1EVM also provides an option to apply a seperate pull-up voltage to any of the output pins by changing the position of jumpers J9, J10, and/or J11 to EXT and connecting the pull-up voltage to test points TP8, TP9, and/or TP10.