[joprinz]

Hello Everyone,

I'm designing a 50V 8A+ Bipolar Stepper Motor driver. I'm new to Discrete H-Bridges and plus I'm not very familiar with all the new MOSFETS and MOSFET Drivers in the market. I was wondering if you can share your experience with MOSFETS and MOSFET Drivers.

So far the Drivers I came across are

• Intersil HIP4082
• IRS2304
• Microchip TC4424

And The MOSFETS

• STF40NF06
• IRFZ24
• IRFZ44
• IRF9530 and IRF540

Well I came across plenty of other parts as well. Lets jus say the more U seek the More U find in this case. Just before I decide on one part I come across another which seemed better(btw My knowledge on MOSFETS is Very Limited. So cant really say if its Really a Better one I jus found). So I was wondering if someone can help me pick the right Driver and MOSFET for a Driver with the following Specs

• Dual H-Bridge (MOSFET) Bipolar Stepper Driver 8A+ @ 50V
• Step Sequencing will be done using a PIC or Atmega uC
• Step Rate will be in the range of 2000-3500 Pulses/Second
• Current Limiting is done using an External PWM @ 20kHz

Please Advice!

Thank You.

Joe!

[JRoque]

Hello Joe,

My two cents: I've used the HIP4081A which is similar to your choice. I had a hard time getting rid of a sneaky current loop so I would recommend you watch out for proper layout and use a single ground return point.

As for MOSFETs - and I'll likely draw the ire of some here with this comment - I'd go for the lowest RDSon on a rated device. Highspeed, etc are not that important in this application. Keeping in mind also that voltage rating should be high enough to account for motor back EMF and a few techniques like a parallel diode across the FET input resistor helps drain it quickly and avoid cross conduction.

I like Atmel micros better than Microchip's but that might be a moot point soon if Microchip succeeds in gobbling up Atmel. Doh!

JR

[joprinz]

Thanks JR for your input

I was told IR2104 and IRF540N is a well tried n tested pair to use in H-Bridges. I'm currently looking at using them in my driver.

Please share your experiences using the IR2104 and the IRF540N.

Thank You,

Joe!

[bedrive]

i vote for 540 and irs2104

b.r

[vishal pandey]

Hello Everyone,
i am looking to bild H-Bridges.stepper driver using IR2184 and IRF540N anyone can help me
thank