MOSFET specs for RAMPS January 31, 2015 05:57PM |
Registered: 9 years ago Posts: 100 |
Re: MOSFET specs for RAMPS January 31, 2015 08:49PM |
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Re: MOSFET specs for RAMPS February 01, 2015 04:26AM |
Registered: 13 years ago Posts: 7,616 |
Quote
plankton
Can anyone tell me what the important specs are if I'm looking at other models?
Generation 7 Electronics | Teacup Firmware | RepRap DIY |
Re: MOSFET specs for RAMPS February 01, 2015 09:06AM |
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Re: MOSFET specs for RAMPS February 01, 2015 10:11AM |
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Re: MOSFET specs for RAMPS February 01, 2015 01:11PM |
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Re: MOSFET specs for RAMPS February 02, 2015 04:45AM |
Registered: 13 years ago Posts: 7,616 |
Generation 7 Electronics | Teacup Firmware | RepRap DIY |
Re: MOSFET specs for RAMPS February 02, 2015 09:53AM |
Registered: 9 years ago Posts: 100 |
Re: MOSFET specs for RAMPS February 02, 2015 10:57AM |
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Re: MOSFET specs for RAMPS February 06, 2015 06:38AM |
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Re: MOSFET specs for RAMPS February 06, 2015 07:51AM |
Registered: 10 years ago Posts: 14,672 |
Quote
prashantdshinde
Hi,
If I replace the MOSFET on RAMPS with IRLB8743, will the 300x300 heatbed work??
Re: MOSFET specs for RAMPS December 22, 2015 04:37AM |
Registered: 11 years ago Posts: 1,277 |
IRLB3034 shows VGS = 4.5V, ID = 172A @max 2mΩ whereas the IRLB8743 shows VGS = 4.5V, ID = 32A @max 4.2mΩ both of those are for Rds(on) so which of those is making one better over the other?Quote
Learner
Thr IRF2804 may not be a good choice due to the Vgs(thr) rating (look at Fig 3 for 5V). Most heatbed drivers are controlled by the MCU directly so you need to select what is commonly referred to as a logicalLevel MOSFET or subLogicLevel. It's a good idea to check what the RDSon for 4.5V is if they don't claim to be Logic Level driven.
I've always recommened IRLB8743 or IRLB3034/IRLB3036 as good ones to use. IRLB3034/IRLB3036 are usually more expensive but have better RDSon (specially the IRLB3034) and sometimes can be found when the IRLB8743 isn't available.
Re: MOSFET specs for RAMPS December 25, 2015 02:13PM |
Registered: 14 years ago Posts: 1,092 |