Mosfet Array - Page 1
Forum section: electronics / beginners

author: Unknown
author_rank: Unknown
timestamp: June 18, 2015, 04:46:38 am
content: I am having trouble finding a mosfet array containing an array of independent mosfets similar to a transistor array. I dont want to be restrained to logic levels but current shouldnt be an issue. I want to keep a minimum parts count. Any thoughts or suggestions?

author: Jeroen3
author_rank: Super Contributor
timestamp: June 18, 2015, 06:00:18 am
content: What is the purpose of the mosfets? There are about 5k in digikeys "FETs - Arrays" category.

author: Unknown
author_rank: Unknown
timestamp: June 18, 2015, 08:20:00 am
content: Hi, well I did do the lazy google thing,Jeroen3 and I wasnt very successful (including digikey, etc.). And I have been looking at the parts lists used in other designs containing multiple mosfets and I really havent found something satisfactory. I would like to make a flexible interface to independently drive/control a number of different devices using different voltage levels and different current levels. If I require more power for a particular output I can always add a discrete mosfet to one of the outputs of the array. I have found one device FDC6401N of the type Im looking for but it only contains 2 independent mosfets. I was hoping for at least 4. Thanks for responding.

author: Unknown
author_rank: Unknown
timestamp: June 18, 2015, 08:25:56 am
content: I have thought of using a relay bank to do this and it would work but thats quite crude and I was hoping for a more elegant solution.

author: sleemanj
author_rank: Super Contributor
timestamp: June 18, 2015, 09:25:11 am
content: I think realistically that when we are talking about SOT-23 or smaller surface mount MOSFETs, there isn't a great need to develop single packaged arrays of multiple fets.With that said, you could look at the TPIC6259 and variantshttp://www.ti.com/product/tpic6259

author: Jeroen3
author_rank: Super Contributor
timestamp: June 18, 2015, 09:44:52 am
content: Maybe you find what you need of you search for smart high or low side switches.Those are available in arrays, but have a relatively low power rating.

author: rs20
author_rank: Super Contributor
timestamp: June 18, 2015, 10:07:21 am
content: Er, as Jeroen says, there's 5000 on digikey. What are all of those options lacking?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 18, 2015, 05:11:48 pm
content: Quote from: roger kerr on June 18, 2015, 08:20:00 amYeh, you'd make a great politician...What'ssatisfactory?What min/max volts, amps? Switching rate? Protection (short/overcurrent, inductive/over voltage, ESD, surge, ??)?Tim

author: Unknown
author_rank: Unknown
timestamp: June 18, 2015, 07:27:11 pm
content: Thank you everyone. Im looking at the suggestions put forward. Not exactly what I had originally thought was a straight forward question. I had thought that if I found the right device I would build a ckt around it. I think I need to go back to the drawing board and better define my requirements as is being gently suggested by Tim. I think one of the difficulties Im challenged with is that its difficult to put very much power into a small pkg and hence they arent really available. ALD114804 is one that I just found but I dont think it is sufficient for what Id like. So thank you all and Ill close this post.