SNOU216 February   2025

 

  1.   1
  2.   Description
  3.   Applications
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 BOOSTXL-LMG2100-MD PCB Overview
    2. 2.2 Heatsink
    3. 2.3 Jumper Information
    4. 2.4 Header Information
    5. 2.5 Setup
  8. 3Software
    1. 3.1 Software Description
    2. 3.2 Opening Project Inside CCS
    3. 3.3 Modification on Universal Motor Control Lab Example
    4. 3.4 Change PWM Frequency and Deadtime
    5. 3.5 Software Guide
  9. 4Hardware Design Files
    1. 4.1 Design Files
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Related Documentation

1.3 Specification

BOOSTXL-LMG2100-MD Board (Green) Installed on BOOSTXL Control Board (Red) shows the system block diagram of the three-phase GaN inverter with the BOOSTXL-LMG2100-MD board indicated in the red-dotted box.

BOOSTXL-LMG2100-MD BOOSTXL-LMG2100-MD Block Diagram Figure 1-1 BOOSTXL-LMG2100-MD Block Diagram

The three-phase inverter with shunt-based precision phase current sensing accepts input DC voltages from 12V to 60V; the nominal DC input voltage is 48V. A wide input voltage range, DC/DC converter LMR38010 generates the 5V rail to supply the LMG2100 gate driver and the 3.3V current sensor reference, a 3.3V LDO supplies the current sense amplifier, input buffer and other auxiliary circuits.

Each of the three inverter half-bridges employs an integrated GaN half-bridge module (LMG2100), a 1mΩ phase current shunt and a differential current sense amplifier (INA241) with a gain of 50V/V and a midpoint voltage of 1.65V, set by the 3.3V reference (REF3333). A high common mode voltage input amplifier with comparator (INA310) monitors DC bus current and it will disable the PWM buffer when overcurrent occurred (hardware protection). The trip threshold is set to 30A. A linear thermistor (TMP302) monitors the PCB temperature close to the GaN power module.

The EVM interfaces to a host processor, like C2000 MCU. It provides the PWM high- and low-side input signals, the phase current sense amplifier output voltage, and the scaled low-pass filtered phase voltage for each of the three phases. The PWM signals are buffered. A PWM enable signal (active low) allows the host processor or INA310 to enable and disable all three complementary PWM simultaneously through the onboard buffer.

The C2000 MCU LaunchPad with the TMS320F280039C device is connected to the EVM and implements a sensorless, speed-variable, field-oriented control of a synchronous motor using the InstaSPIN-FOC™ software. An example firmware based on the TMS320F280039C LaunchPad has been provided to evaluate the BOOSTXL-LMG2100-MD design with a 48V low-voltage servo motor.