On 18/03/2016 10:30 AM, Jon Elson wrote:
> Winfield Hill 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.)
> 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
>

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).

Winfield Hill 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.)
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

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

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


-- 
 Thanks,
    - Win

"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 

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

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

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 

andre schrieb:

> I know L298 or L6208 another is SN754410

L6201PS appears to be a better fit.

Tilmann

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

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