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N-channel Mosfet Driver

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elmurry	Posted: March 26, 2012 12:15 am
Newbie Group: Members+ Posts: 22 Member No.: 36,529 Joined: February 17, 2012	I use IR2117 mosfet driver to drive a high-side mosfet (IRF3710) in a buck converter, the driver works well with a bootstrap circuit, and I use a function generator as an input signal to the driver with 10 V square wave signal to test it because the minimum allowable input voltage of the driver is 9.5 V as seen in the datasheet, the problem is that the converter is intended to be controlled by a microcontroller which has an output signal of only 5 V, so I tried to find another driver with 5 or less volt input capability, and finally I found MAX4420 driver with 6 A output current and logic input. http://datasheets.maxim-ic.com/en/ds/MAX4420-MXT429.pdf The question is; Does this driver need bootstrap circuit or not ? Thanks

johansen	Posted: March 26, 2012 12:26 am
Forum Addict ++ Group: Trusted Members Posts: 2,767 Member No.: 10,912 Joined: September 06, 2007	no, because its not a highside driver. try something like this http://www.national.com/opf/LM/LM5100.html#Overview -------------------- THREE WORDS YOU DO NOT WANT TO HEAR: "GLOBAL BANK HOLIDAY"

elmurry	Posted: March 26, 2012 01:32 am
Newbie Group: Members+ Posts: 22 Member No.: 36,529 Joined: February 17, 2012	Why it is not a highside driver ? It doesn't say it is a lowside only. I think it is high and low side driver.

elmurry	Posted: March 26, 2012 01:38 am
Newbie Group: Members+ Posts: 22 Member No.: 36,529 Joined: February 17, 2012	The driver you suggested is good but it is SOIC-8 package and I want DIP-8 to be plugged in a socket.

johansen	Posted: March 26, 2012 01:44 am
Forum Addict ++ Group: Trusted Members Posts: 2,767 Member No.: 10,912 Joined: September 06, 2007	the datasheet is difficult to read but it is a Single Noninverting amp. http://www.maxim-ic.com/datasheet/index.mvp/id/2439 the max1822 may work for you -------------------- THREE WORDS YOU DO NOT WANT TO HEAR: "GLOBAL BANK HOLIDAY"

elmurry	Posted: March 26, 2012 02:21 am
Newbie Group: Members+ Posts: 22 Member No.: 36,529 Joined: February 17, 2012	what do you think of this one ? http://www.google.com/url?sa=t&rct=j&q=ir2...15_Mkgj8dydFPxQ

Sch3mat1c	Posted: March 26, 2012 03:26 am
Forum Addict ++ Group: Moderators Posts: 18,147 Member No.: 73 Joined: July 24, 2002	Maxim is a bad idea, they're notoriously bad at supporting small quantities. Samples sure, but when you want some more... Try this. http://www.irf.com/product-info/datasheets/data/irs2184.pdf V_IH 2.5V min Tim -------------------- Answering questions is a tricky subject to practice. Not due to the difficulty of formulating or locating answers, but due to the human inability of asking the right questions; a skill that, were one to possess, would put them in the "answering" category.

elmurry	Posted: March 26, 2012 03:57 am
Newbie Group: Members+ Posts: 22 Member No.: 36,529 Joined: February 17, 2012	I think the difference between IR2184 and IRS2184 is just that IRS2184 is RoHS compliant. Correct?

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