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> N-channel Mosfet Driver
elmurry
Posted: March 26, 2012 12:15 am
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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
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johansen
Posted: March 26, 2012 12:26 am
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no, because its not a highside driver.

try something like this
http://www.national.com/opf/LM/LM5100.html#Overview



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elmurry
Posted: March 26, 2012 01:32 am
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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.
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elmurry
Posted: March 26, 2012 01:38 am
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The driver you suggested is good but it is SOIC-8 package and I want DIP-8 to be plugged in a socket.
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johansen
Posted: March 26, 2012 01:44 am
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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


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elmurry
Posted: March 26, 2012 02:21 am
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Sch3mat1c
Posted: March 26, 2012 03:26 am
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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


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elmurry
Posted: March 26, 2012 03:57 am
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I think the difference between IR2184 and IRS2184 is just that IRS2184 is RoHS compliant. Correct?
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