RE: Votlage Clamp Mosfet Recommendation
Posted: Thu Feb 08, 2018 10:36 am
I've spent a bit of time trying to find appropriate parts for my application for the protection circuitry on page 8 of the datasheet and Page 40 of the manual. I am using an MCP but I think this applies to ROBOCLAW's as well, so I am posting here because this part of the forum is more active.
Info about my project: Converting a Midwheel Drive Powerchair Base to use the programmable MCP263 motor controller. This particular powerchair has dual 1000 watt (max current) motors as the drive wheels. I have two 12V 73A batteries wired to give 24V.
I am a hobbiest with electronics and not at all an expert, Will the following components and values provide enough safety circuitry even if I do get into a max current stall state? All links are to digikey
I am not sure if it is needed but for R1 and R3 I have rather large heatsinks https://www.digikey.com/product-detail/ ... ND/1625171
Info about my project: Converting a Midwheel Drive Powerchair Base to use the programmable MCP263 motor controller. This particular powerchair has dual 1000 watt (max current) motors as the drive wheels. I have two 12V 73A batteries wired to give 24V.
I am a hobbiest with electronics and not at all an expert, Will the following components and values provide enough safety circuitry even if I do get into a max current stall state? All links are to digikey
- R1 : Riedon PF2205-1RF1 - https://www.digikey.com/scripts/DkSearc ... 0703639120
- SW1 : Standard household light switch
- D1 : Semtech Corporation 1N5554C.TR - https://www.digikey.com/scripts/DkSearc ... 0703629119
- F1 : Littelfuse Inc. 0299080.ZXNV - https://www.digikey.com/scripts/DkSearc ... 0703639120
- Q1 - recomended - Nexperia USA Inc. BUK965R8-100E,118 - https://www.digikey.com/scripts/DkSearc ... 0703649121
- R3 - Same as R1
- R2 : standard 10K (1/4 watt) pullup to 5V
I am not sure if it is needed but for R1 and R3 I have rather large heatsinks https://www.digikey.com/product-detail/ ... ND/1625171