I am searching for a single SMD H bridge which does not cost me 10€. I first wanted an outdated L298 in SMD housing. But @JLCPCB that cost me €10,-+. Even Aliexpress.... not fun any more.
Can someone recommend me a still affordable H-bridge IC in SMD housing. I only require one channel and the load is < 1A. I also need to measure the current. I usually use a shunt resistor for this purpose.
Costs aside... replacing the L298 by something news might be good idea. I am not really up to date which chips are relative new.
Any recommendations?
Bas
EDIT:
Also. I switch inductive loads, so if the thing has internal flyback diodes, that is a pro
That breakout board itself is useless howeverrrrr that chip on the otherhand seems perfect. It seems there isn't a shortage (yet) and my pcb supplier seems to have it in stock for about 1$ in HTSSOP-16. So I can always solder it myself if needed.
Thnx
Bas
EDIT:
The DRV8870 seems even better (smaller, cheaper and present in the kicad library)
with the right equipment it's doable indeed. You need a few extra bits and pieces around it (like the diode, possible resistor, cap) so that's why I mentioned the breakout board. sometimes it's just easier to stick one of those onto the PCB you build.
I completely agree on that one, sometimes that is a good choise. I use those mini buck converters with castellated holes. They cost around 50 cents and I can solder them flat to my board designs like a little 3A buck converter backpack.
I recently repaired a bunch of RC MG hobbyservo's that had their motordriver blown up after someone connected the lipo backwards.
The motordriver chip is the TC118S I know the datasheet is in Chinese, but the drawings and table gave me enough info. It can drive 2A current and cost about 12 cent a piece if you buy 10 from uncle Ali.
I can. This thing is a block module to control a single analog modeltrain. To make a layout you would need many of these devices. They can communicate with neighbouring units via an RJ12 cable. There is also a global communication line for information broadcasts.
To know where the train is, they have 2 current sensors each on both ends of a block. If sending a train over is not possible because the following unit is occupied, the current unit will stop the train. The unit will also stop the train if the unit is the last one in the chain.
You can use existing digital handcontrollers to take control of your analog trains. Every train is given a pseudo address and the modules keep track of who has which train. The modules also synchronize their track signals to prevent shorts. A broadcast of a handcontroller is directed to a certain address. So every modules check if he is the one who has the train with that address.
And likewise, if a module is overruling a train because the next block is occupied. This information is also broadcasted because the handcontroller must know the speeds of all active train.
The module also containss connector for handling potential 3-tone signals.
The H bridge is used for PWM'ing the tracks or in the case of digital trains it must generated a DCC square wave. This is a digital square wave which reverses polarity to send information to digital trains.
A similar system is in existance but that is far more complicated and expensive. The 'other one' also requires a computer with track control software in order to work. Mine does not need a computer and is self regulating. Provided that I can get it to work in the first place
