10 watt transistors for 16 h-bridges - Page 1
Forum section: electronics / beginners

author: Capernicus
author_rank: Frequent Contributor
timestamp: December 27, 2021, 07:40:32 pm
content: I looked at mouser, and the prices of the transistors were humungous.https://au.mouser.com/c/semiconductors/discrete-semiconductors/transistors/rf-transistors/?output%20power=10%20Wits 34 dollars for a mosfet there, but I'd prefer a BPJT.If I bought those mosfets - my h-bridges would cost $2000. that is complete rubbish. I can buy a decent computer for that much.Is there anywhere you can go for something cheaper than this!??!?

author: wraper
author_rank: Unknown
timestamp: December 27, 2021, 07:48:56 pm
content: Should we create a "Capernicus just does not make sense" thread?

author: Capernicus
author_rank: Frequent Contributor
timestamp: December 27, 2021, 07:50:10 pm
content: Im not very good at shopping, wherever I go its always super expensive, and I know you guys know how to buy components better than me.Can you please humour my deficiencies and just help a little guy out?

author: wraper
author_rank: Unknown
timestamp: December 27, 2021, 07:54:07 pm
content: But seriously, what H bridge? With parts meant to be used with something like radars?

author: Capernicus
author_rank: Frequent Contributor
timestamp: December 27, 2021, 07:58:56 pm
content: similar to this, except im doing it slightly different. u just have block both sides of the motor, its pretty simple.

author: wraper
author_rank: Unknown
timestamp: December 27, 2021, 08:01:34 pm
content: You don't go shopping for RF power transistors to drive a motor. But use something like thishttps://au.mouser.com/ProductDetail/Toshiba/TK40A06N1S4X?qs=HVbQlW5zcXXetBqR1xf7fw%3D%3DOf course the most suitable part should be selected according to voltage and motor power which were not mentioned.

author: Capernicus
author_rank: Frequent Contributor
timestamp: December 27, 2021, 08:07:18 pm
content: THANKYOU!!! =)

author: NorthernWing
author_rank: Contributor
timestamp: December 28, 2021, 01:10:01 pm
content: ...yeah, you've been looking at RF power transistors. It sounds like you're trying to run a motor here, not a radar front end.I for one am a fan of just using these things whenever I need to drive something. They're easy to use and quite hard to kill.https://www.mouser.com/ProductDetail/Toshiba/TB67H303HG?qs=Zwj7mHVHPHQhWEhFr6x4Bw%3D%3DIf you want NPN BJTs - D44H8/D44H11, TIP41C, 2N3055/MJF3055/TIP3055. For MOSFETs you should be able to come up with a boatload of results if your voltage+current requirements are even remotely reasonable... what exactly have you been searching/filtering for?

author: Capernicus
author_rank: Frequent Contributor
timestamp: December 28, 2021, 01:35:17 pm
content: Thats rated well above what I need. But thanks for the link!!My bot is only 10volt 1amp. Its amazing that one u showed is 300 watts, I bet that is twice as strong as a man.I wonder how big the motor is that goes with it.If you make a really strong one, then prob is the battery is going to drain 100 times faster, so have to put down a 6x6x6 matrix of 3000 farad super capacitors for that thing, to even last 10 minutes.

author: wraper
author_rank: Unknown
timestamp: December 28, 2021, 02:39:47 pm
content: Quote from: Capernicus on December 28, 2021, 01:35:17 pmDoes not mean you need a 10W transistor though. Power rating is the maximum power transistor is allowed dissipate (generally not in free air). Nothing to do with power of the load.

author: Terry Bites
author_rank: Super Contributor
timestamp: December 28, 2021, 06:39:29 pm
content: That's RF power devices for you! Well not for you.. Switching MOSFETS are cheap- even halfway dcecent ones. Under a kiwi:https://nz.element14.com/infineon/irf520npbf/mosfet-n-100v-9-7a-to-220ab/dp/910303101Or For a couple of kiwis a monster:https://nz.element14.com/infineon/irf2804pbf/mosfet-n-40v-280a-to-220/dp/8657491It can only handle a measly 75A not 280A.But this will do you:https://nz.element14.com/infineon/irfr024npbf/mosfet-n-55v-16a-d-pak/dp/8649618