| Electronics > Projects, Designs, and Technical Stuff |
| Any MOSFET similar of ULN2003? |
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| tom66:
--- Quote from: nctnico on September 20, 2015, 09:37:00 pm --- --- Quote from: LukeW on September 20, 2015, 08:58:16 pm ---Only 100mA? Why not just any small cheap FET, eg. 2N7002? If you need a flyback diode, add one externally. Or you could choose jellybean BJTs if you don't like FETs. --- End quote --- If the device has an internal diode (and all mosfets have one) you can do without the flyback diode. --- End quote --- Only if it's across the motor. The diode in most MOSFETs isn't. You can only get away with this if the breakdown energy rating is << the energy stored in the inductor (0.5LI^2) |
| zapta:
--- Quote from: alsetalokin4017 on September 20, 2015, 10:02:07 pm ---http://www.utsource.net/ic-datasheet/TPIC2701N-786242.html I've ordered from UTSource several times and have always been happy. Generally takes 10-12 days from ordering to delivery in my mailbox in Texas. --- End quote --- This is a discontinued and non SMD IC, right? |
| OlegH_ua:
I had the same question and I've found good chip for ULN2003 substitution: https://www.ti.com/product/TPL7407L price is about $0.35 |
| ogden:
--- Quote from: OlegH_ua on September 11, 2018, 11:30:13 am ---https://www.ti.com/product/TPL7407L --- End quote --- Min 8.5V supply :( |
| OlegH_ua:
--- Quote from: ogden on September 11, 2018, 11:35:58 am ---Min 8.5V supply :( --- End quote --- COM pin supply voltage usually is equal to load power, so for most cases 8,5V min is normal. Also from datasheet's paragraph 9: "Though 8.5 V minimum is recommended for Vcom, the part will still function with a reduced COM voltage that has a reduced gate drive voltage and a resulting higher Rdson" |
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