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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