Hi Charles, Thank you very much for your reply. 1. We set the current limit on the supplies, but none of them are less than 100mA. The current limit for VSUB is 1A. 2. We didn't program the LM96570 in CW mode. And the board got damage when powering up. We didn't make any settings on the GUI Control Panel on PC. 3. We use the following supplies set up. Their GND are connected. We connet all of the supplies to a Switch Board and connet the switch outputs to the TX_SDK_V1 board. We use the Switches to control the power up sequence. And we use a LED for each Switch to indicate whether the power supply is on or off. We have tested the power up sequence of the Switch Board before connet to the TX_SDK_V1 board. And after damage, we also checked the Switch Board, the power up sequence is right. Thank you. Frank
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