Any MOSFET similar of ULN2003? - Page 1
Forum section: electronics / projects

author: zapta
author_rank: Super Contributor
timestamp: August 25, 2015, 07:38:59 am
content: The ULN2003 has multiple channels (I need only 4), can be driven directly from 5V MCU and has protection diodes for inductive load (e.g. 28BYJ-48 stepper motor) but has high saturation voltage because of the darlington driver. Is there a similar MOSFET IC, with closer to zero saturation voltage?

author: Psi
author_rank: Super Contributor
timestamp: August 25, 2015, 07:57:24 am
content: what current do you need to switch?Maybe this?http://www.digikey.com/product-detail/en/BTS4130QGA/BTS4130QGACT-ND/2231089Search digikey in the "PMIC - Power Distribution Switches" section.There are lots of multichannel driver ICs that have built in fets and accept logic level input.Many are intended to drive inductive loads and dont need a back emf diode

author: Zero999
author_rank: Super Contributor
timestamp: August 25, 2015, 08:03:51 am
content: http://www.ti.com/lit/ds/symlink/tpic2701.pdf

author: bingo600
author_rank: Super Contributor
timestamp: August 25, 2015, 08:04:07 am
content: Maybe the TI TPIC family of power arraysIe. (Or see companion prods in bottom)http://www.ti.com/product/tpic6259/Bingo

author: zapta
author_rank: Super Contributor
timestamp: August 25, 2015, 02:00:43 pm
content: Quote from: Psi on August 25, 2015, 07:57:24 am100ma per channel at 2 out of the 4 channel, plus some margin. This is to operate this stepper motorhttp://robocraft.ru/files/datasheet/28BYJ-48.pdfon 5V USB power.Quote from: Hero999 on August 25, 2015, 08:03:51 amYes, this is what I looked for. Will give it a try. Thanks.

author: zapta
author_rank: Super Contributor
timestamp: August 25, 2015, 02:12:18 pm
content: Quote from: Hero999 on August 25, 2015, 08:03:51 amTried to source it but Digiky and the other distributors don't carry it. Is it discontinued? Any new replacement?(I am not interested in ebay or China only ICs).Edit: found this onehttp://www.digikey.com/product-detail/en/TPL7407LDR/296-37284-1-ND/4733033

author: ElektroQuark
author_rank: Unknown
timestamp: August 25, 2015, 02:29:30 pm
content: TI's web says TPIC2701 is obsolete. No replacement. So forget about it.

author: ralphd
author_rank: Frequent Contributor
timestamp: August 25, 2015, 02:29:51 pm
content: Quote from: zapta on August 25, 2015, 07:38:59 amSince you only need 100mA per channel, what about 4 x 2222a? Cheap and widely available, and VCE(sat) @100mA collector current should be <0.2V.https://www.fairchildsemi.com/datasheets/PN/PN2222A.pdf

author: dom0
author_rank: Super Contributor
timestamp: August 25, 2015, 03:07:21 pm
content: tpic6b595, has the shifter built in.

author: zapta
author_rank: Super Contributor
timestamp: September 20, 2015, 07:23:30 pm
content: Quote from: zapta on August 25, 2015, 02:12:18 pmJust realized that the TPL7407L can't replace the ULN2003 in my application because it requires a voltage of at least 8.5V and my circuit has only 5V.

author: LukeW
author_rank: Frequent Contributor
timestamp: September 20, 2015, 08:58:16 pm
content: 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.

author: zapta
author_rank: Super Contributor
timestamp: September 20, 2015, 09:05:12 pm
content: Quote from: LukeW on September 20, 2015, 08:58:16 pmYes, I could do that, 4 FETs or pre-biased BJTs and 4 diodes. It's easier though to manually pick and place a single component.

author: tom66
author_rank: Super Contributor
timestamp: September 20, 2015, 09:32:22 pm
content: Something like a dual N-channel MOSFET in SOT26?Two pieces of this ought to work:http://docs-europe.electrocomponents.com/webdocs/104e/0900766b8104e4cc.pdf

author: nctnico
author_rank: Super Contributor
timestamp: September 20, 2015, 09:37:00 pm
content: Quote from: LukeW on September 20, 2015, 08:58:16 pmIf the device has an internal diode (and all mosfets have one) you can do without the flyback diode.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: September 20, 2015, 10:02:07 pm
content: http://www.utsource.net/ic-datasheet/TPIC2701N-786242.htmlI'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.

author: tom66
author_rank: Super Contributor
timestamp: September 20, 2015, 10:10:53 pm
content: Quote from: nctnico on September 20, 2015, 09:37:00 pmOnly 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)

author: zapta
author_rank: Super Contributor
timestamp: September 21, 2015, 01:24:05 am
content: Quote from: alsetalokin4017 on September 20, 2015, 10:02:07 pmThis is a discontinued and non SMD IC, right?

author: OlegH_ua
author_rank: Newbie
timestamp: September 11, 2018, 11:30:13 am
content: I had the same question and I've found good chip for ULN2003 substitution:https://www.ti.com/product/TPL7407Lprice is about $0.35

author: ogden
author_rank: Super Contributor
timestamp: September 11, 2018, 11:35:58 am
content: Quote from: OlegH_ua on September 11, 2018, 11:30:13 amMin 8.5V supply

author: OlegH_ua
author_rank: Newbie
timestamp: September 11, 2018, 12:02:20 pm
content: Quote from: ogden on September 11, 2018, 11:35:58 amCOM 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 areduced COM voltage that has a reduced gate drive voltage and a resulting higher Rdson"

author: Zero999
author_rank: Super Contributor
timestamp: September 11, 2018, 12:35:16 pm
content: Quote from: OlegH_ua on September 11, 2018, 12:02:20 pmIt would be nice if there was a graph of the on resistance vs power supply voltage, on the data sheet.

author: MasterT
author_rank: Frequent Contributor
timestamp: September 11, 2018, 02:50:00 pm
content: Toshiba has IC operating as low as 2V: TBD62783APGLong list sourcing/ sinking types, MIN voltage 2V, 2.5V, 3V, 7V:https://www.mouser.ca/Toshiba/Semiconductors/Power-Management-ICs/Gate-Drivers/_/N-41fcp?P=1z0zkx4

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: September 11, 2018, 04:11:11 pm
content: Take a look at Toshiba TBD62003A. Similar idea to TI TPL7404L (FETs instead of Darlingtons), but without the 8.5V requirement.

author: JPortici
author_rank: Super Contributor
timestamp: September 11, 2018, 05:34:32 pm
content: Diodes inc make a ULN2003 compatible that uses logic level mosfets, i used it in a project some months ago

author: koendv
author_rank: Contributor
timestamp: April 24, 2019, 10:21:53 am
content: tpl7407ldr. Texas Instruments. Plug-in compatible.

author: aju11
author_rank: Contributor
timestamp: April 24, 2019, 10:31:33 am
content: DRV777

author: dom0
author_rank: Super Contributor
timestamp: May 20, 2019, 03:03:04 pm
content: Quote from: OlegH_ua on September 11, 2018, 11:30:13 amI've made very good experiences with the TPIC6B595, reliable part, not too expensive, and for most applications it even saves a part and board space, because it already contains a shift register.Quote from: dom0 on August 25, 2015, 03:07:21 pm