I am using LM2576HV for 5V regulation from 48V input. out put pin is connected to SS36 diode after running for some time the diode getting shorted and regulator is heating up... what might be the issue any idea
current is some 500ma to 1Ahi S,
What is the 5V load current and power dissipation in the diode.??
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lm1117 alsocurrent is some 500ma to 1A
5v iam giving it to usb host lm3526 l
100uhWhat is the inductor you are using? The wrong inductor can easily damage the circuit. It must be the correct core material for the frequency, inductance and power handling for the application.the classic "Fred's inductor" just does not work. If you don't know what that is, Google it, along with "Jim Williams"
And yes, please post the schematic.
Find the attachment for circuitWhat is the inductor you are using? The wrong inductor can easily damage the circuit. It must be the correct core material for the frequency, inductance and power handling for the application.the classic "Fred's inductor" just does not work. If you don't know what that is, Google it, along with "Jim Williams"
And yes, please post the schematic.
Your diode is burning I guess. Try to use "1n4007 and 1n4148". One of them should work.I am using LM2576HV for 5V regulation from 48V input. out put pin is connected to SS36 diode after running for some time the diode getting shorted and regulator is heating up... what might be the issue any idea
Please find the image for circuitYour diode is burning I guess. Try to use "1n4007 and 1n4148". One of them should work.
Also please post the circuit so we can check the connections and other components. I think the coil or capacitors are not placed properly.
This is from the datasheet.Your diode is burning I guess. Try to use "1n4007 and 1n4148". One of them should work.
No, do not do that. Neither of those diodes is even remotely suitable as the freewheeling diode. The 1N4007 is grossly too slow and the 1N4148, while extremely fast, is much too small.Your diode is burning I guess. Try to use "1n4007 and 1n4148". One of them should work.
The diode is given in the circuit.No, do not do that. Neither of those diodes is even remotely suitable as the freewheeling diode. The 1N4007 is grossly too slow and the 1N4148, while extremely fast, is much too small.
If you do have input voltage up to 60, it would be worth trying a diode rated for higher voltage. Unfortunately, 60 volts is a common upper limit for Schottky diodes. There are certainly 80 V and 100 V parts available, but they are considerably less common. The also usually are slightly higher forward voltage. An ultrafast diode could be used, but a Schottky diode is better.
With 48 V input and 5 V output, the diode will be conducting almost 90% of the time, whereas with 12 V in and 5 V out it would be conducting less than 60% of the time. For the same output current, this would mean it would run hotter with the higher input voltage. Still, I don't think diode temperature is likely to be a problem unless the operating environment is very hot.
Yes, it is at the input for reverse polarity protection and has nothing to do with the problem.Do you have the same components?
The diode is given in the circuit.