euygcddcbu

I also used the max1978 chip and encountered the same problem as yours, the nmos tube was broken down. How did you solve it in the end?

LYLY123

Can you give me a circuit diagram with a TVS tube? And if the accuracy is to reach 0.001 as he said, do I have to readjust the resistors and capacitors in the PID circuit? I used the development board from the official website and it can reach about 0.002, but when I re-drew it myself, the accuracy is only 0.01?

巴神所示

euygcddcbu posted on 2023-5-21 13:39 OP, I also use the max1978 chip and encounter the same problem as yours, the nmos tube is broken down. How did you solve it in the end? Urgent request

Why does my max1978 overheat?

planab

LYLY123 posted on 2023-11-3 11:08 Can you give me a circuit diagram with a TVS tube? And if the accuracy is to reach the 0.001 he said, are the resistors and capacitors in the PID circuit going to...

I'm also debugging MAX1978 recently. I also drew the board myself. Can we exchange some ideas? VX:EEELeveneven

planab

Bashenshi posted on 2024-2-20 17:11 Why does my max1978 overheat?

Note that the DAC range is 0.5-1V. If it exceeds this range, it is not within the normal working range. If the resistor current limit is not set at this time, the power consumption will increase greatly. The board current can reach 2A and it will get hot.