hello everyone. here i have a project to make bts7960. i bought 2 bts7960 modules and then tried them with esp32. then i looked for bts7960 schematics and then made my own pcb for 2 bts7960. however after i removed the mosfet and ic octal buffer 74ac244, on my pcb bts7960 didn't work. when i gave pwm 127, the outputs were different. some were 0, 3.4, and others were 12V. i used 12V driver input. please help if anyone has ever experienced the same mistake as me.
The BTS7950 Has both Low and High voltage lockout. If you are not in that range it will not work. There some minimum voltages also given on the datasheet. Try using 74HCT parts they have a lower threshold voltage.
I use 12V voltage from the power supply, is that voltage not within that range?>
It depends on which voltage you are talking about. There is a terminal for 5. Check this link: https://www.handsontec.com/dataspecs/module/BTS7960%20Motor%20Driver.pdf I use the modules you copied, and have great luck with them. I use them for High Side, Low Side, and Bridge drivers. They work great with LEDs. Check this data sheet, after going over it you should know what your problem is. They give max and min which if exceeded can damage the part or it will not work. https://www.infineon.com/dgdl/BTS7960_Datasheet.pdf?folderId=db3a304412b407950112b408e8c90004&fileId=db3a304412b407950112b43945006d5d
I have found the problem. The voltage output does not match my pwm because the BTS 7960 I am using is damaged. I have replaced it with BTN7970 and it is functioning normally. However, I still have not found the origin of the problem why my BTS7960 could be damaged. Thank you for your help
This is what probably fried it. It would probably be the buffer IC.
in ic buffer i use 5V, 12V to control led
can i have your schematic to control led using BTS7960?
It is simple. for an active high connect the motor plus to the load and the other end to ground. For negative connect the load to minus and the other end to positive. Each half of the bridge can sink or source about 30+ amps without much heating, or at least that is what is happening for me. It is just a hair cooler sourcing by maybe a degree or two. Note there are two drivers so you can easily switch 60 amps. They are very sensistive to bad grounds, be sure they are good and the device connects the power ground to the logic ground so be careful.
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