Hi,
I currently doing my final year project regarding LED driver. In my design I required 300 mH (at least 0.5 A rate current) inductor to smooth current after the full diode rectifer. (hopefully u guys can understand I try to import schematic but I don't know how to do it)
Now I facing a problem with this inductor, it is hard to get normal 2 pin inductor (I know there are a tranformer type inductor with has high inductance and high current but I try not to use them because they are huge). After some research I found out that inductor can simply replace by a choke. Therefore I bought B82733F2701B001 which is 100 mH, 0.7 A choke from EPCOS http://www.farnell.com/datasheets/1465589.pdf. I place 3 of them in series to produce 300 mH. Currently I only connected from pin 1 to pin 2 of the choke.
After connecting three choke in series I measure the inductance of the three indutor from a LCR meter and I got around 300 mH. Then I happily turn on the power supply and think that it going to work but load current wave form does not get smoothed. P.S I try the same circuit by using an inductor bank and set the inductance to 300 mH and I got a quite reasonable waveform (small current ripple).
Summary:
1) Can a 4 pin choke act as normal inductor?
2) How to connect B82733F2701B001 form EPCOS such that it will act as an inductor or can it be an inductor?
Thanks for the help. I am just an beginner.
I currently doing my final year project regarding LED driver. In my design I required 300 mH (at least 0.5 A rate current) inductor to smooth current after the full diode rectifer. (hopefully u guys can understand I try to import schematic but I don't know how to do it)
Now I facing a problem with this inductor, it is hard to get normal 2 pin inductor (I know there are a tranformer type inductor with has high inductance and high current but I try not to use them because they are huge). After some research I found out that inductor can simply replace by a choke. Therefore I bought B82733F2701B001 which is 100 mH, 0.7 A choke from EPCOS http://www.farnell.com/datasheets/1465589.pdf. I place 3 of them in series to produce 300 mH. Currently I only connected from pin 1 to pin 2 of the choke.
After connecting three choke in series I measure the inductance of the three indutor from a LCR meter and I got around 300 mH. Then I happily turn on the power supply and think that it going to work but load current wave form does not get smoothed. P.S I try the same circuit by using an inductor bank and set the inductance to 300 mH and I got a quite reasonable waveform (small current ripple).
Summary:
1) Can a 4 pin choke act as normal inductor?
2) How to connect B82733F2701B001 form EPCOS such that it will act as an inductor or can it be an inductor?
Thanks for the help. I am just an beginner.