Can you help me what's best h-bridge driver controller for this? I'm planning to use L293D (I don't know if it will be burnt quickly), L298, transistors using TIP41 NPN and TIP42 PNP. My power source will be a Panasonic 6v 4A Lead Acid battery. I will drive a 1/15 rc tank. Thank you
Edit: I would like also to aim for convenience. I hope you can help me with this.
That is a beefy little motor. When stalled it will try to draw over 10 amps at 6 volts. So even if you parallel the 2 bridges in the L298 you won't be able to stall your tank because the LM298 is only good for 4 amps. Having said that the voltage drop of the 298 is 4.9 volts at 2 amps so with a 6 volt battery you won't be able to get more that a couple of amps thru the motor. The bottom line is it may work but its going to be more like a heater than a motor.
I'm not sure there is an ic solution for your application. It may take a discrete FET bridge. You could use a 12 volt battery and current limit the LM298 and at least then you could get more power from the motor.
That is a beefy little motor. When stalled it will try to draw over 10 amps at 6 volts. So even if you parallel the 2 bridges in the L298 you won't be able to stall your tank because the LM298 is only good for 4 amps. Having said that the voltage drop of the 298 is 4.9 volts at 2 amps so with a 6 volt battery you won't be able to get more that a couple of amps thru the motor. The bottom line is it may work but its going to be more like a heater than a motor.
I'm not sure there is an ic solution for your application. It may take a discrete FET bridge. You could use a 12 volt battery and current limit the LM298 and at least then you could get more power from the motor.
Oh ronv, sorry I don't get it, what I mean is those are my choices. If what's better H-bridge chip L298 or H-bridge with Tip42 and Tip41. Andy suggested L298, how about yours?
Sorry I did not look at the spec sheet at first, the ebay page had currents in the MA. range, So ya the L298 chip is not a good one to use, it may work for testing. If you look on the robot sites thare are many H drivers out thare. Andy
Thanks for clarification Boncuk, Hi, I'm really not familiar about the PCB design of the custom made RC tanks. Do you have any idea if they are using driver chips than Hbridges made from transistors? Because I think it will use most of the space inside the tank if i'll use these transistors.
EDIT: How about also if I use TIP42 and TIP41? I don't really get what's the difference with Bipolar and MOSFET transistors. Sorry
I'm really not familiar about the PCB design of the custom made RC tanks. Do you have any idea if they are using driver chips than Hbridges made from transistors?
Thanks for your replies Andy, Boncuk, Stephen87. I'm already exposed at BJT transistors for h-bridges. I already used them on my previous projects. I'm not yet familiar if it's also using PnP or NPN types. I don't know if the same concept is applied on MOSFET dc motor drivers. Here's what I found. I've read that MOSFETs have internal diodes. He's using RFD3055. I have some questions.
1. Will this be fine even without external diodes?
2. If I can't find this type of mosfets on our local stores, what substitutions will I look for? Power MOSFETs?
3. What should I check also on the datasheet? Is it the current drain?
The Mosfet H-bridge will not work
1) The Mosfets selected need 10V between the gate and source to properly turn on. The lower Mosfets get only 5V.
2) The upper Mosfets get nothing because for the source to be pulled up to +5V then the gate must be +15V which is impossible.
Usually P-channel Mosfets are used for the upper mosfets so that they turn on when the gate goes to ground.
All Mosfets must be the 'logic-level" type that properly turn on when the gate-source voltage is only 5V (ordinary Mosfets need 10V).
Hi,I really can't find any mosfet h-bridge driver chips
I'm looking at the list here: **broken link removed**
This is the only store in Philippines that has an online shop with a lot of driver ICs and ships products around our country. This is my only option since in our province the shops here don't sell those kind of stuffs. I hope you could help me check there.
I really wanted to save space for our RC tank. It already gets crowded if I'll make a board of H-bridge. I'm using 2 6v 4A Lead Acid batteries that eats up a lot of space.
Anyway, I tried creating this MOSFET h-bridge based from the basic schematics. I can see it turning on with my PIC.
here is a motor controller with very small dimensions. It measures 41X35X15mm (1.6X1.4X0.6") and has a weight of 83gram. It controls 12V motors up to 50A (60A peak).
here is a motor controller with very small dimensions. It measures 41X35X15mm (1.6X1.4X0.6") and has a weight of 83gram. It controls 12V motors up to 50A (60A peak).
Thank you for the reply Boncuk, guess like I have to do it on my own. Shipping takes a lot of time.
Can someone so kind help me how to choose the right P-channel and N-channel? What will I look at in terms of my case? I would like to power my dc motors efficiently without something wasted.
1) Your motor draws 10A to 22A but the power transistors you selected have a max allowed current of only 6A.
2) Your 330 ohm resistors provide a base current to the power transistors of less than 14mA but the datasheet for the power transistors shows a base current of 600mA for only 6A output. The little 2N3904 transistors cannot provide 600mA if the resistor value is reduced.
3) The datasheet for the output transistors shows that when they have a base current of 600mA and an output current of only 6A then their saturation voltage loss is 1.5V each for a total loss of 3V. The low voltage might stall the motors when you try to start them.
Post a video of the overloaded transistors blowing up.