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Hi Klaus thanks for the response.
-I do have VCC cap in place on the pcb but not on the simulation and same for GTDR pin diode.
-the current sense resistor is R4 in the schematic
-the circuit is the same as the sample circuit on LTspice and in the datasheet just scaled to fit my application
I've built a boost PFC circuit on a PCB using the LT1249 controller, using the reference design guide provided by Analog Devices here: https://www.analog.com/media/en/technical-documentation/data-sheets/1249fbs.pdf
I've scaled the reference design to achieve an output voltage of 60V with a...
Thank you for the answer! can i ask which pages mentions the bevel indicating the pin 1? https://www.analog.com/media/en/technical-documentation/data-sheets/1249fbs.pdf
I'm trying to solder the LTC1249 boost PFC controller from analogue devices however i cannot see a dot on either the top or bottom of the ic that indicates one of the corner (thus the orientation on the PCB):
Sorry do you mean i should use only one secondary winding first?
If the voltages are not exactly the same what would happen? is there a tolerance for which the voltages can deviate?
What's the safest method to measure the voltage? should a load resistor be placed or is open measurement of the...
Is it safe to to parallel the output windings of a transformer like this one https://uk.rs-online.com/web/p/toroidal-transformers/7529410?
Such that the output voltage is 24Vrms with a maximum power rating of 500VA (~20Arms maximum)?
If so should the wires with a dot annotation be connected...
I need to order a 4 layers 200x200mm PCB from JLCPCB and I was wondering what will the realistic delivery time as it says 3-4 days but i assume that is for Chinese customers only. Also will i have to pay a separate customs fees as its being shipped form the China?
Thank you for the reference circuit I really appreciate it. I noticed that there is a huge ripple around 20V, could that be only reduced by sizing the output capacitor?
1677774185
I'm new with configuring PFC controllers on IC, is there a non-analytical way of setting the gains for the current...
Hi I'm trying t o setup the LT1249 boost PFC controller to work with an input of 24Vrms to obtain an output of 60V at 5A. I've set the reference voltage parameters according to the datasheet here https://www.analog.com/media/en/technical-documentation/data-sheets/1249fbs.pdf
Considering the load...
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