SNLU254A November   2020  – July 2022 DS160PT801

 

  1.   Abstract
  2.   Trademarks
  3. 1EVM Control and Configuration Information
    1. 1.1 Retimer Pin Controls
    2. 1.2 USB-to-SMBus Interface
    3. 1.3 PCIe PRSNT# Signal Control and Configuration
    4. 1.4 PCIe Reference Clock Control and Configuration
  4. 2EVM Power
    1. 2.1 EVM Current Sensing
  5. 3SigCon Architect GUI
    1. 3.1 Setup and Installation
    2. 3.2 Configuration Page
    3. 3.3 Low-Level Page
    4. 3.4 EEPROM Page
    5. 3.5 Control Panel
    6. 3.6 High-Level Page
    7. 3.7 Diagnostic Page
    8. 3.8 Eye Monitor Page
  6. 4PCB Material Information
    1. 4.1 DS160PT801 PCB Design
    2. 4.2 DS160PT801 PCB Stackup
    3. 4.3 DS160PT801 PCB Power Distribution
    4. 4.4 DS160PT801 Local Decoupling
  7. 5DS160PT801X16EVM Schematic
  8. 6Hardware BOM
  9. 7Revision History

2.1 EVM Current Sensing

Onboard current sense devices are incorporated into the EVM design and layout to monitor voltage regulator power delivery and assist with thermal analysis. The voltages measured at this connector can be used to calculate the efficiency of the voltage regulator and the current delivered to each DS160PT801 device.


GUID-20201025-CA0I-KG1C-P36P-QHQSZSPLMZ1S-low.png

Figure 2-3 DS160PT801X16EVM Current Sense Measurement Locations

Equation 1 through Equation 4 describe the relationship between the voltage measured from the current sense devices and the current delivered.

12V_SENSE (J60): Input 12-V supply to TPS548B22 VR

Equation 1. VMEASURED / 20 = Input VR Current (Amps)

1P8: 1.8-V supply to retimer 0 (U2).

Equation 2. VMEASURED / 20 = Retimer, 1.8 V current consumption in Amps

P2A: 1.17-V supply to retimer (PWR_2A)

Equation 3. VMEASURED / 20 = Retimer, 1.17 V current consumption (PWR_2A) in Amps.

P2D: 1.17-V supply to retimer (PWR_2B). Also includes PWR_2C.

Equation 4. VMEASURED / 0.2 = Retimer, 1.17 V current consumption (PWR_2B + PWR_2C) in Amps.

Notes:

  1. Retimer 0 (U2) sense connections are in J28
  2. Retimer 1 (U3) sense connections are in J33
  3. 12V_SENSE (J60) is on the bottom layer