The diodes are NOT optional on the L298.
DLC
: Thank you for you replay
: I thought that the diods are optional so I didn't attache them, I : attached the bypass capacitors.
: For the motors each draws 1.5 Amp , with 24v so I don't think they : exceed the rating of the chip.
: I think the chip get hot after it stops. so I will attache the diod and : see what happen.
: Thank you again.
: Ahmed
: Anthony Fremont wrote: : > "ahosyney" wrote : > > Hi all : > >
: > > We are using a L298 IC to control DC motors from a uControler. The : > > problem is that it suddnly stops after a short run and became very : > hot. : >
: > Did it get hot _after_ it stopped, or did it get hot and then stop? : If : > it didn't get hot until after it stopped, it might be latch-up caused : by : > not having the diodes. Did adding the heatsink make it run for a : longer : > period of time before stopping? : >
: > > We attached a heat sink to cool down the chip but it didn't solve : the : > > problem. In the datasheet there is a Diode bridge that we didn't : put : > in : >
: > Why didn't you put it in? It's not really optional. Put the bypass : > caps in too. : >
: > > the circuit. Any one have any idea about the problem. : >
: > How much current does the motor draw? What voltage are you using to : > drive the motor?