Single H-bridge chip (DIP only)?
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Posts: 46,084
Hello,
We're working on an important customer request and need some help. We're
looking for a single H-bridge chip that can control a motor up to 6 amps (12
volts max) forward and backward only. Some level of speed control would be
nice but is not required.
This chip MUST be in a DIP format, inexpensive and widely available. Can
anybody give us some links to datasheets we should review?
Thanks,
Ken Gracey, Parallax
New BS2p interfaces with 1-Wire, I2C,
and Hitachi-compatible LCDs
Order one today through www.parallaxinc.com
Our educational site is www.stampsinclass.com
We're working on an important customer request and need some help. We're
looking for a single H-bridge chip that can control a motor up to 6 amps (12
volts max) forward and backward only. Some level of speed control would be
nice but is not required.
This chip MUST be in a DIP format, inexpensive and widely available. Can
anybody give us some links to datasheets we should review?
Thanks,
Ken Gracey, Parallax
New BS2p interfaces with 1-Wire, I2C,
and Hitachi-compatible LCDs
Order one today through www.parallaxinc.com
Our educational site is www.stampsinclass.com
Comments
http://www.allegromicro.com/datafile/3953.pdf
you can get it free just goto samples you can get up to three of them
at one time. I know, I have got alot of free chips from them.
TC
--- In basicstamps@y..., "Ken Gracey" <kgracey@p...> wrote:
> Hello,
>
> We're working on an important customer request and need some help.
We're
> looking for a single H-bridge chip that can control a motor up to 6
amps (12
> volts max) forward and backward only. Some level of speed control
would be
> nice but is not required.
>
> This chip MUST be in a DIP format, inexpensive and widely
available. Can
> anybody give us some links to datasheets we should review?
>
> Thanks,
>
> Ken Gracey, Parallax
>
> New BS2p interfaces with 1-Wire, I2C,
> and Hitachi-compatible LCDs
> Order one today through www.parallaxinc.com
> Our educational site is www.stampsinclass.com
>
Do you really mean DIP, or do you just want through hole? You want 72 Watts
dissipated from a DIP package you will have thermal management challenges, I
suspect.
www.allegromicro.com would be my usual suspect, but their offerings top out
at about 3A at higher voltages. Don't know if they would derate or not
(probably not).
National has some that will peak to 6A, but not sustain it. I wonder if you
could piggy back two 3A bridges (like a National LMD18200)? They make that
part in a DIP although I've only seen it in 11-pin TO220 form. In the DIP it
looks like it has 2 channels, but I don't know how well they would equalize.
Probably not real cheap either.
Not DIP and I have no idea how you'd get them, but
http://www.mskennedy.com/pdf/4223rf.pdf looked interesting. Again, this is
through hole.
That's all I could think of off the top of my head.
Regards,
Al Williams
AWC
* Put your Stamp on the Internet:
http://www.al-williams.com/awce/netporter.htm
>
Original Message
> From: Ken Gracey [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yZC7Wt7ZMY1LwMS6wlbRQ0tWugcvZ6T4rNBlpNOJRYk4bz7o-_Y7R62j3fbVDtYLpkvGbLn2fWn2peobTwHiKA]kgracey@p...[/url
> Sent: Friday, June 08, 2001 10:19 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Single H-bridge chip (DIP only)?
>
>
> Hello,
>
> We're working on an important customer request and need some help. We're
> looking for a single H-bridge chip that can control a motor up to
> 6 amps (12
> volts max) forward and backward only. Some level of speed control would be
> nice but is not required.
>
> This chip MUST be in a DIP format, inexpensive and widely available. Can
> anybody give us some links to datasheets we should review?
>
> Thanks,
>
> Ken Gracey, Parallax
>
> New BS2p interfaces with 1-Wire, I2C,
> and Hitachi-compatible LCDs
> Order one today through www.parallaxinc.com
> Our educational site is www.stampsinclass.com
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed with. Text in
> the Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
input to set speed. This would be the easiest thing for a PWM-
challenged Stamp!
I'm using National LMD18245's for some RC motor control apps.
The '245 uses 4 lines to set current control, and another to set
direction. Pin-hngry. And not cheap.
patmat
I've got one robot that uses this and it works quite well. 5 MOSFETS, a
couple of 2N2222's and a few resistors makes an H bridge that will have
braking and a PWM input. Takes three stamp pins to run it and you don't have
to worry about smoking anything. This means you could probably control 2
motors with one Stamp, which you could talk to through one pin from a higher
level processor.
Original Message
> What I'd really like to see is moderate current (3A?), with serial
> input to set speed. This would be the easiest thing for a PWM-
> challenged Stamp!
> I'm using National LMD18245's for some RC motor control apps.
> The '245 uses 4 lines to set current control, and another to set
> direction. Pin-hngry. And not cheap.
I'm using an Allegro 2998 now... 12 pin SIP, puts 2A out to 2 motors
(2 full H bridges). $6. Takes a pwm and a direction input (2 pins
each motor).
Then to allow the Stamp to do other things while the motors run, I
have a couple serial-to-pwm chips (I forget the number... need to
look it up...). Send a serial byte to the PWM chip once, it puts out
constant PWM until a new byte shows up. 4 pins to run these (2 chip
select, 1 data, 1 clock), and 2 direction pins to the 2998... 6 in
all...
In an R/C application, I can still read two RX outputs... making good
use of the BS1's 8 pins.
patmat
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> So why not cobble an H bridge and a Stamp 1 and make your own motor
control?
> I've got one robot that uses this and it works quite well. 5
MOSFETS, a
> couple of 2N2222's and a few resistors makes an H bridge that will
have
> braking and a PWM input. Takes three stamp pins to run it and you
don't have
> to worry about smoking anything. This means you could probably
control 2
> motors with one Stamp, which you could talk to through one pin from
a higher
> level processor.
>
>
Original Message
>
>
> > What I'd really like to see is moderate current (3A?), with serial
> > input to set speed. This would be the easiest thing for a PWM-
> > challenged Stamp!
> > I'm using National LMD18245's for some RC motor control apps.
> > The '245 uses 4 lines to set current control, and another to set
> > direction. Pin-hngry. And not cheap.
Original Message
From: <patmat2350@a...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, June 19, 2001 2:08 PM
Subject: [noparse][[/noparse]basicstamps] Re: Single H-bridge chip (DIP only)?
> Even better:
> I'm using an Allegro 2998 now... 12 pin SIP, puts 2A out to 2 motors
> (2 full H bridges). $6. Takes a pwm and a direction input (2 pins
> each motor).
>
> Then to allow the Stamp to do other things while the motors run, I
> have a couple serial-to-pwm chips (I forget the number... need to
> look it up...). Send a serial byte to the PWM chip once, it puts out
> constant PWM until a new byte shows up. 4 pins to run these (2 chip
> select, 1 data, 1 clock), and 2 direction pins to the 2998... 6 in
> all...
>
> In an R/C application, I can still read two RX outputs... making good
> use of the BS1's 8 pins.
>
> patmat
>
> --- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> > So why not cobble an H bridge and a Stamp 1 and make your own motor
> control?
> > I've got one robot that uses this and it works quite well. 5
> MOSFETS, a
> > couple of 2N2222's and a few resistors makes an H bridge that will
> have
> > braking and a PWM input. Takes three stamp pins to run it and you
> don't have
> > to worry about smoking anything. This means you could probably
> control 2
> > motors with one Stamp, which you could talk to through one pin from
> a higher
> > level processor.
> >
> >
Original Message
> >
> >
> > > What I'd really like to see is moderate current (3A?), with serial
> > > input to set speed. This would be the easiest thing for a PWM-
> > > challenged Stamp!
> > > I'm using National LMD18245's for some RC motor control apps.
> > > The '245 uses 4 lines to set current control, and another to set
> > > direction. Pin-hngry. And not cheap.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed with. Text in the Subject
and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>Where did you buy the Allegro 2998 ?
Ricky -
Why buy them - head for http://allegromicro.com and ask for samples.
They're usually quite generous.
Regards,
Bruce Bates
> Where did you buy the Allegro 2998 ?
>
allegromicro.com.
pm
500 ma unit I think. If you have alot of wheel mass you have to have braking
to make accurate stops and whatnot.
Original Message
> I'm using an Allegro 2998 now... 12 pin SIP, puts 2A out to 2 motors
> (2 full H bridges). $6. Takes a pwm and a direction input (2 pins
> each motor).
>
> Then to allow the Stamp to do other things while the motors run, I
> have a couple serial-to-pwm chips (I forget the number... need to
> look it up...). Send a serial byte to the PWM chip once, it puts out
> constant PWM until a new byte shows up. 4 pins to run these (2 chip
> select, 1 data, 1 clock), and 2 direction pins to the 2998... 6 in
> all...
>
> In an R/C application, I can still read two RX outputs... making good
> use of the BS1's 8 pins.
> > So why not cobble an H bridge and a Stamp 1 and make your own motor
> control?
> > I've got one robot that uses this and it works quite well. 5
> MOSFETS, a
> > couple of 2N2222's and a few resistors makes an H bridge that will
> have
> > braking and a PWM input. Takes three stamp pins to run it and you
> don't have
> > to worry about smoking anything. This means you could probably
> control 2
> > motors with one Stamp, which you could talk to through one pin from
> a higher
> > level processor.
> >
> >
Original Message
> >
> >
> > > What I'd really like to see is moderate current (3A?), with serial
> > > input to set speed. This would be the easiest thing for a PWM-
> > > challenged Stamp!
> > > I'm using National LMD18245's for some RC motor control apps.
> > > The '245 uses 4 lines to set current control, and another to set
> > > direction. Pin-hngry. And not cheap.
but that can be ignored, and you can PWM the enable pin. Has braking.
For me, I'm driving a tank... super low gear, it stops when the pwm
stops!
patmat
--- In basicstamps@y..., Rodent <daweasel@s...> wrote:
> I noticed not many of the Allegro chips have true brakes -- only
the wimpy
> 500 ma unit I think. If you have alot of wheel mass you have to
have braking
> to make accurate stops and whatnot.
>
<snip>
MotorMind B modules in the big robot. *If* Solutions Cubed actually
implements any braking I would be surprised. The brake pin on their modules
slow the motor down a bit faster than coasting, but not much compared to an
H-bridge with true braking.
Original Message
> Look at their 3952. Single bridge, 2A. Designed for current control,
> but that can be ignored, and you can PWM the enable pin. Has braking.
> For me, I'm driving a tank... super low gear, it stops when the pwm
> stops!
> > I noticed not many of the Allegro chips have true brakes -- only
> the wimpy
> > 500 ma unit I think. If you have alot of wheel mass you have to
> have braking
> > to make accurate stops and whatnot.