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.
Did you think to mount the device on an adequate heatsink? What kind of inductor are you using? It might be saturating when your load draws over 3.5A.
As replied in sec, this kind of circuit can have a very high startup current. His power supply may be limiting at 5A and preventing the SMPS from properly starting.
Best regards, Spehro Pefhany
On page 17 of the datasheet, one small item in reference to Figure
10:"For an input voltage of 12V or more, the maximum available output current in this configuration is approximately 700 mA."Have something to add? Share your thoughts — no account required.
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