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5V MOSFET driver

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nospam

Jan 1, 1970
0
I have an application driving a solenoid with a MOSFET H bridge.

A 5v supply would be enough to drive the bridge and the power is moderate
so I could probably build the bridge with logic level complimentary
MOSFETS.

The drive will be PWM at around 20 or 30kHz so the MOSFETS need to switch
fast and I need to drive them hard.

Anyone have suggestions for a 5v buffer to drive the gates? Preferably
cheap and 4 in a package. I was thinking some HC logic bus driver might be
up to the job.
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A

Anthony Fremont

Jan 1, 1970
0
nospam said:
I have an application driving a solenoid with a MOSFET H bridge.

A 5v supply would be enough to drive the bridge and the power is
moderate so I could probably build the bridge with logic level
complimentary MOSFETS.

The drive will be PWM at around 20 or 30kHz so the MOSFETS need to
switch fast and I need to drive them hard.

Anyone have suggestions for a 5v buffer to drive the gates?
Preferably cheap and 4 in a package. I was thinking some HC logic bus
driver might be up to the job.

Microchip makes the TC4423, TC4424, and TC4425 low-side gate drivers, they
have high side as well.
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010666
They are duals, but perhaps they have some quad packages with both. They're
$2 each sngl qty at Digikey.
 
J

John Bordynuik

Jan 1, 1970
0
John Bordynuik selects " I have an application driving a solenoid with a
MOSFET H bridge. "

I would recommend using VNH3SP30. I know you mentioned you are looking for
_just_ drivers but I have used this part to reduce valuable board real
estate.

How much current do you need to control?

John Bordynuik
JBI
john at johnbordynuik.com
 
N

nospam

Jan 1, 1970
0
John Bordynuik said:
John Bordynuik selects " I have an application driving a solenoid with a
MOSFET H bridge. "

I would recommend using VNH3SP30. I know you mentioned you are looking for
_just_ drivers but I have used this part to reduce valuable board real
estate.

Interesting chip (or actually 3 chips in one package) but it is very much
targeted towards driving motors. It isn't specified operating below 9v so
it isn't a solution for me.

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N

nospam

Jan 1, 1970
0
Microchip makes the TC4423, TC4424, and TC4425 low-side gate drivers, they

The Microchip range looks promising. They have a quad lowside driver.
Thanks for the suggestion.
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