PROP to MIC4467 to Mosfet

bennettdan

Hello,
Has anyone used the MIC4467 with the Prop to drive Mosfets ? Looking through the datasheet is has the ability to drive N and P mosfets and It has 4 channels I have the need to drive three N and one P mosfets that will drive some solenoids due to the way the unit is wired.
Thanks Dan B

Phil Pilgrim (PhiPi)

I've long advocated this series of chips for driving MOSFETs. I've even used them for driving speakers in a class-D amplifier configuration:

http://forums.parallax.com/showthread.php?114155

I think you'll be happy with their performance in your app.

-Phil

bennettdan

Thanks Phil I read your post I see that you are not using it to drive the mosfets but actually drive the speaker directly they handle over one amp which is one reason I am looking at the device.

JonnyMac

I used the TC4427 to drive an IRL540 in a 100W LED lighting controller
-- http://ww1.microchip.com/downloads/en/devicedoc/21422d.pdf

bennettdan

@JonnyMac
Thanks for the tip what gate supply voltage do you use?

I have some IR2110 drivers here but they only have two outputs but they interface nicely with 3.3 volt logic but I was really looking for more outputs in a single chip.

JonnyMac

Even though it is a "logic level" MOSFET we're using a 9v gate voltage to make darned sure it's switched fully on. The reason is that we're switching 33v at 3A through it and the client did not want any heat sink on the board (we use vias and the copper on the bottom side; the MOSFET does not get hot). In the design we go from 33v to 9v with an LM317; downsteam of that is a 3.3v regulator for the Propeller and the RS-485 chip (the product is controller in a DMX fixture that puts out the equivalent of 500w of light).

bennettdan

@JonnyMac
Very cool project!
The project I am working on right now is for an automobile and I have up to 14.5vdc to work with on my gate drives.Thanks for the info again.
Dan B