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
H-bridge IC
Started by ●March 14, 2016
Reply by ●March 14, 20162016-03-14
Le 14/03/2016 15:52, Winfield Hill a �crit :> 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. > >I know L298 or L6208 another is SN754410 -- Les politiciens sont impr�voyants, et les �lecteurs sans m�moire!
Reply by ●March 14, 20162016-03-14
On 14 Mar 2016 07:52:59 -0700, Winfield Hill <hill@rowland.harvard.edu> wrote:>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.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. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●March 14, 20162016-03-14
andre schrieb:> I know L298 or L6208 another is SN754410L6201PS appears to be a better fit. Tilmann
Reply by ●March 14, 20162016-03-14
John Larkin wrote...> >On 14 Mar 2016 07:52:59 -0700, Winfield Hill ><hill@rowland.harvard.edu> wrote: > >>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. > > 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.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 by ●March 14, 20162016-03-14
On 14 Mar 2016 08:56:48 -0700, Winfield Hill <hill@rowland.harvard.edu> wrote:>John Larkin wrote... >> >>On 14 Mar 2016 07:52:59 -0700, Winfield Hill >><hill@rowland.harvard.edu> wrote: >> >>>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. >> >> 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. > > 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.Will this switch fast? What's the frequency? If the dissipation is mostly static, the power can be very low. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●March 14, 20162016-03-14
John Larkin wrote...> > Will this switch fast? What's the frequency? If the > dissipation is mostly static, the power can be very low.I'm thinking of 200kHz or so.. 25 watts. -- Thanks, - Win
Reply by ●March 14, 20162016-03-14
Tilmann Reh wrote...> >andre schrieb: > >> I know L298 or L6208 another is SN754410 > > L6201PS appears to be a better fit.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 by ●March 14, 20162016-03-14
"Winfield Hill" <hill@rowland.harvard.edu> wrote in message news:nc732f01riv@drn.newsguy.com...> These candidates are all such old technology. > This doesn't appear to be an area of interest > to IC manufacturers.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 by ●March 14, 20162016-03-14
