This document is the ROHM TO-247-4L Half-Bridge Evaluation Board Operation Manual, which mainly introduces the product features, usage and precautions of the evaluation board
The document serves as an operation guide for the TO-247-4L Half-Bridge Evaluation Board, specifically designed for SiC MOSFETs. It details the necessary external power sources and input signals required to avoid malfunctions, emphasizing strict adherence to specific power ON and OFF sequences.
Key operational features include several LED indicators that display the status of high voltage (HV), control power (+5V), isolated gate drive power, and various fault conditions such as HS/LS failures and over-current protection (OCP). The manual explains how these LEDs function and describes procedures for resetting latch conditions using a dedicated push-button switch.
The board goes into a Latch condition due to an external circuit fault, but it can be cleared by pushing the Reset button.
After clearing the abnormal condition causing the Over Current Protection (OCP), push the Reset switch (SW301) to turn OFF the OCP LED.
The LED for OCP turns ON when the measured voltage at TP303 is around -0.65V.