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H-bridge IC

I'm looking for a small, inexpensive H-bridge, or full-bridge IC, including MOSFET switches, for a forward-converter application. (My old favorite HIP4080 series has 20 pins and requires external FETs.) Most of the ICs with internal switches that I've found are meant for driving motors, and seem to have slow switching speeds. 40 volts and 2 amps are my minimum requirements. The LMD18200 series is nice, but overkill and rather expensive for my application.

If we can't find a full-bridge IC, maybe there's a half-bridge IC including FET switches. There are plenty that require external MOSFETs.

Well, OK, I found the FAN7093 half-bridge with 50A capability, but now I have mention the other requirement, haha, it must work down to 0V, so N-MOS FETs only, no p-MOS allowed.

--
 Thanks, 
    - Win
Reply to
Winfield Hill
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I know L298 or L6208 another is SN754410

Reply to
andre

Whatever you use will have to dissipate roughly 5 watts, so it's not going to be tiny, and cooling on a PCB could be tricky. External fets might be best; SO8 duals maybe.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

andre schrieb:

L6201PS appears to be a better fit.

Tilmann

Reply to
Tilmann Reh

I may well have to go the external-FET route, but I've seen 25 to 100m-ohm FETs on PWM switchers, similar would keep my dissipation in the under half-watt region.

--
 Thanks, 
    - Win
Reply to
Winfield Hill

Will this switch fast? What's the frequency? If the dissipation is mostly static, the power can be very low.

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
Reply to
John Larkin

I'm thinking of 200kHz or so.. 25 watts.

--
 Thanks, 
    - Win
Reply to
Winfield Hill

Ah, MOSFET switches, good. I'm not happy with largish packages and high Rds = 0.3 ohms, but the L6201PS is a contender. A bit costly. These candidates are all such old technology. This doesn't appear to be an area of interest to IC manufacturers.

--
 Thanks, 
    - Win
Reply to
Winfield Hill

Can you hack it with a stepper/servo controller instead? Might be one with a "straight through" operating mode.

I don't have any suggestions unfortunately.

Tim

--
Seven Transistor Labs, LLC 
Electrical Engineering Consultation and Contract Design 
Website: http://seventransistorlabs.com
Reply to
Tim Williams

Yes, right. Or hack with a completely different approach.

--
 Thanks, 
    - Win
Reply to
Winfield Hill

ARRGH! I used the HIP4080 in a servo amplifier about 20 years ago. I kept blowing them up. After talking to an applications engineer, I found out that that "80 Volt" part had never successfully been run above 50 V. Well, I was running them at 59 V, but they kept popping. I eventually redesigned the whole thing with the IR2113S, and never popped anything else. But, it did require a lot of extra circuitry to replace all the stuff the HIP4080 did in the PWM modulator functions.

Jon

Reply to
Jon Elson

I've been using the TA8050 successfully for a while. As I recall it it's good for 1.5amp with 7pin connection (1 not used). It's rated as a motor driver max 30v with all the protections (O/V , O/C etc).

Reply to
Rheilly Phoull

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