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Texas Instruments bq2477xEVM-540 Battery Charge Controller EVMs

Texas Instruments bq2477xEVM-540 Battery Charge Controller Evaluation Modules (EVMs) are designed to help evaluate the bq2477x devices. The bq2477x devices are SMBus controlled NVDC-1 charge controllers with N-CH MOSFET Selector and Current Monitoring. The input voltage range, for the buck converter, is between 6 and 24V, with a programmable output of 1–4 cells (bq2477x). The device also has a charge output current range of 128mA to 8.128A. These evaluation modules don’t include the EV2400 interface device; this will have to be ordered separately to evaluate each of the bq2477x evaluation modules.

Features

  • Host-controlled NVDC-1 1S-4S battery charge controller: bq24770 SMBus; bq24773 I2C
  • Provides test point for /PROCHOT, IADP, IBAT, PMON, ILIM, REGN, ACOK, ACDET, and switching node
  • Programmable input current limit, charge voltage, charge current, and minimum system

Required Equipment

  • Power Supplies
    • Power supply #1
      • A power supply capable of supplying 20V at 1A is required
    • Power supply #2
      • A power supply capable of supplying 3.3V at 0.2A is required
  • Load #1
    • A 20V (or above), 10A (or above) electronic load that can operate at a constant current mode
  • Load #2
    • A Kepco BOP36-12M, 0 ≈±36V/0 ≈±12A, bipolar operational power supply or equivalent
  • Meters
  • Six Fluke 75 multimeters (equivalent or better)
    • Four equivalent voltage meters and three equivalent current meters
      • The current meters must be capable of measuring 5A+ current
  • Computer
    • A computer with at least one USB port and a USB cable
    • The EV2400 USB driver and the bq2477x SMB evaluation software must be properly installed
  • Software
    • The bq2477x ICs are all compatible with the EV2300 hardware kit, but it is preferred to use the EV2400
      • There are two setup GUI install programs
        • The bq24770 Evaluation Software-2.0.0.2-Setup.exe (used for all SMB spins) program
        • The bq24773 Evaluation Software-2.0.0.2-Setup.exe program (used just for the I2C bq24773 version)
      • The launch executable file will load the EV2300 software first, followed by the bq2477x software
      • Verify if the GUI is configured for SMB or I2C by looking at the Mode listed above the Texas Instruments logo
      • Now is a good time to copy the two GUI setup files to your hard drive and then run as administrator (right-click on the file and select “Run as administrator”) to install the GUI software before connecting the hardware
  • EV2400 Controller
    • The EV2400 controller is an MSP430F5529 running at 4MHz
      • The controller firmware is stored in flash memory and is executed by the core at power-up
      • The controller communicates with the target device(s) through either: a 2-wire SMBus communication port, a 1-wire HDQ port, or a 2-wire EEPROM I2C port
      • The 2-wire SMBus communication port supports both SMBus and I2C protocols
      • CRC-8 checksum verification for the data packets prevents data corruption over the USB
      • The controller interfaces with the computer through a USB port
      • Device software (GUI) loaded on the computer is used to communicate with the device via the EV2400 controller to write and read registers on the device

Test Setup

Mechanical Drawing - Texas Instruments bq2477xEVM-540 Battery Charge Controller EVMs
Opublikowano: 2017-02-28 | Zaktualizowano: 2025-03-05