There are dozens, if not hundreds of those chips. Most are capable of operating at high voltages (for offline conversion) but these also work well at low voltages.
The IR2110 is a classic example. Lin and Hin inputs control up to 500V low-side and high-side MOSFETs. 2A gate drive. $1.27 at Future, over 5k in stock.
Other driver ICs are limited to lower voltages, but are faster, e.g. the IRS20124, 200V, works to 1MHz, as low as 15ns deadtime. Onlt one input, internal circuits take care of the adjustable deadtime. For class-D audio. IR offers optimized MOSFET pairs.
I think Jim's looking for actual monolithic H-bridges, not drivers for MOSFETs that are in an H-bridge configuration.
IIRC, some of the low-side gate drivers look like they might work, but you have to do some creative reading on the data sheet, and the top current will be nothing like what it can pulse out to a gate for a few microseconds.
In the low amps range, a mosfet driver chip is all lots of apps need. IXDN602 for example. It's rated 35 volts, 2 amps per section, and you can parallel the two sections. Fast and cheap.
Everybody makes 4427 types, too.
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John Larkin Highland Technology, Inc
lunatic fringe electronics
What I'm looking for is a true 1/2 H-bridge, say 15-20V max, 300-500mA source and sink capability, logic level controls.
This is something a client needs off-the-shelf... if it were a chip design it'd be a piece-a-cake... I already have several running in custom security camera control chips. ...Jim Thompson
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| James E.Thompson | mens |
| Analog Innovations | et |
Sounds about like a motor driver IC for a VCR. Unfortunately they are proba bly all out of production so you don't want them for new designs.
But then this sounds so simple that discrete components might be the way to go. I mean, you just want to turn on two transistors at will ? And you wan t it open circuit when not "triggered" ? I wouldn't even bother with an IC for that. But you probably have your reasons. I can't read your mind. Arixo na has that t... nevermind.
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