SLVUCB3 March   2022

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Related Documentation
  3. 2Schematics, Bill of Materials, and Layout
    1. 2.1 TPS3760EVM Schematic
    2. 2.2 TPS3760EVM Bill of Materials
    3. 2.3 Layout and Component Placement
  4. 3EVM Connectors
    1. 3.1 EVM Test Points
    2. 3.2 EVM Jumpers
  5. 4EVM Setup and Operation
    1. 4.1 Input Power (VDD)
    2. 4.2 SENSE1/SENSE2 Inputs
    3. 4.3 RESET1/RESET2 Outputs
    4. 4.4 Capacitor Time Delay Reset/MR
    5. 4.5 Capacitor Time Delay Sense/MR

SENSE1/SENSE2 Inputs

The SENSE1 and SENSE2 inputs allow for any voltage rails to be monitored divided down through resistors. The default option of the TPS3760EVM is populated with a TPS3760A012DYYR device, which has an adjustable 0.8V threshold. The resistors R2 and R4 (both 49.9kΩ) control the voltage divider for the TPS3760 SENSE pin by using the SENSE1 input.These 0603 resistors can be replaced with any values to form a voltage divider that can then divide down to trip at the 0.8V threshold. This behavior and instructions on selecting these resistors can be found described in the TPS3760 datasheet in the 'Adjustable Voltage Thresholds' section. To use the voltage divider located on-board, make sure to populate a jumper on J4, and a jumper on the bottom two pins of J3 for SENSE1. To monitor VDD directly on either SENSE1 or SENSE2 populate a jumper on J4 and on the bottom two pins on J3 for for SENSE1, and populate a jumper on J2, and the bottom two pins on J1 for SENSE2 . The adjustable delays on the sense inputs can be found detailed in Section 4.5.

Also, note that the default option for this board is the TPS3760A012DYYR, which is a single channel device. TPS3760 does not include a SENSE2 input. SENSE2 and RESET2 signal path should follow the datasheet pinout configuration from the TPS3760 datasheet. The SENSE2 and RESET2 pins are for TPS37 & TPS38 family of devices which have dual channels.