SLUUCC3 february   2021 BQ79631-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4.   General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  5. 1General Description
    1. 1.1 Key Features
      1. 1.1.1 Key Electrical Parameters
  6. 2Theory of Operation
    1. 2.1 Single Board
    2. 2.2 Stacked Systems
  7. 3Connectors
    1. 3.1 Powering the BQ79631EVM
    2. 3.2 Primary Input and Output Connectors
      1. 3.2.1 Jumper Placements
      2. 3.2.2 Host Interface
      3. 3.2.3 High-Side and Low-Side Communications
    3. 3.3 High Voltage Networks
      1. 3.3.1 High Voltage Safety Considerations
      2. 3.3.2 High Voltage Connections
      3. 3.3.3 High Voltage Alternatives
      4. 3.3.4 Switches
      5. 3.3.5 Buffers
      6. 3.3.6 Insulation Detection Network
    4. 3.4 Current Sense
      1. 3.4.1 SRP/SRN
      2. 3.4.2 VCSamp_Out
    5. 3.5 GPIO Connections
  8. 4Quick Start Guide
    1. 4.1 Launch Pad Connection and Example Code
      1. 4.1.1 Required Devices for Using the Example Code
      2. 4.1.2 Power Connections
      3. 4.1.3 Connecting the EVM to the TMS570 LaunchPad
      4. 4.1.4 Software
    2. 4.2 USB2ANY Connection with GUI
      1. 4.2.1 GUI
      2. 4.2.2 GUI UART Connection
  9. 5Physical Dimensions
    1. 5.1 Board Dimensions
  10. 6BQ79631-Q1 EVM Schematic, Assembly, Layout, and BOM
    1. 6.1 Schematics
    2. 6.2 Layout
    3. 6.3 Bill of Materials

3.3.2 High Voltage Connections

The 5V_LV connector can supply power directly to the BQ79631-Q1 device through supplying the desired high voltages to measure across the resistor divider circuits, which must be supplied through separate connections. These connections are given in the table below.

GUID-20200717-CA0I-L2SZ-K9KC-H3FH7J8RFWFD-low.png
Table 3-6 Pin Descriptions
PinRated VoltageComments
VCC40V40 VAlternate supply connection for if the user does not have access to a high voltage lab.
HV_Plus400/800 VPositive connection for HV_Plus network.
HV_Neg400/800 VNegative connection for HV_Plus network.
HV_Fuse400/800 VPositive connection for HV_Fuse network.
HV_Extra1_Plus400/800 VPositive connection for the 1st of 2 customizable HV networks available to the user.
HV_Extra2_Plus400/800 VPositive connection for the 2nd of 2 customizable HV networks available to the user.
LINK_Plus400/800 VPositive connection for the LINK_Plus network.
LINK_Neg400/800 VNegative connection for the LINK_Plus network.
Charge_Plus400/800 VPositive connection for the charge network.
Charge_Neg400/800 VNegative connection for the charge network

Each of these high voltage supply connections supports 400-V inputs. This voltage is divided across a series of 330-kΩ resistors so that the high voltages do not come into contact with any amplifiers or pins on the BQ79631-Q1 device.

Note: The BQ79631EVM is rated for 800 V but the resistor values in the divider networks have been selected for 400-V application. To use this EVM for 800-V testing, swap out each of the 330-kΩ resistors for 660-kΩ resistors.
WARNING: Again, please verify that extreme care is taken around these networks.