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I checked that yes the transformer was saturating so i made a new transformer and it is working fine but the new problem is it heats up to 80deg and also power factor reduces as the input voltage increases (Pf 0.94 for 230v). where to look for the problem According to datasheet capacitor at comi...
In their application note they have used the same value resistors. I increased the value of r1 to 1M it only delayed the startup time but flickering was still there. How we know if transformer is saturating or not. As the voltage reaches 130V the power supply is working fine.
i have designed constant power supply using fairchild's fl7733a ic
Specifications
I/p voltage : 80 - 280V
Output Voltage : 7-40 v
Output current : 1.5Amps
When i connect full load led lights flicker when voltage is low(around 80 v ) but as soon as voltage is increased lights work properly...
In application note of infenion's IC IRS2982S the wire size for transformer design is given as
Start - 11,12
End - 9,10
Wire size - 2 x triple φ0.45mm
Layers - 1/2 secondary
what does this means 2 x triple φ0.45mm and 1/2 secondary?
Thanks for the reply. I want to know the topology that is better suited for 300 watts. Also I would like to know the IC and MOSFET used in the design. Else if you can share a sample design of 300 watt SMPS constant voltage will also help.
Thanks for the reply, I have already designed SMPS with buck and boost topology upto 25 watt and with constant current supply. I am confused between the MOSFET being used in constant voltage supply and the design topology.
I need help with the design of 300 wattage constant voltage supply for led strip constant voltage 15 voltage and current 20 ampere. I want to know which MOSFET are used and how transformer is designed and which topology is best suitable.
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