The diodes are NOT optional on the L298.
: 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.
: 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?
: > it didn't get hot until after it stopped, it might be latch-up caused
: > not having the diodes. Did adding the heatsink make it run for a
: > period of time before stopping?
: > > We attached a heat sink to cool down the chip but it didn't solve
: > > problem. In the datasheet there is a Diode bridge that we didn't
: > 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?
* Dennis Clark firstname.lastname@example.org www.techtoystoday.com *
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