help needed.
i use the exact circuit (figure 10) in the manual of LM2576, but cant get the output of -12v the power supply is 24v with the max amp of 5amp, when it turns on the chip get hot and the power supply get overloade with a high amp of about 3.5amp.
is there any one can help on this? THanks.
This kind of circuit has a very high startup current, and if your power supply actually limits at 5A as opposed to that being the rated capacity it may not start reliably.
Best regards, Spehro Pefhany
did you make a mistake and not insulate the back side of the chip from the ground ? as you are using the ground here as the - output the back plane of the chip is usually connected to the ground also. so in turn, you are dead shorting the chip if this is what your doing.
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