Post by thread:[EE] gate drive transformers

Does anyone have any source recommendations for gate drive transformers? Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free samples but I'm looking for something that wouldn't be ridiculously expensive for low-volume use. Thanks. -- Martin K

On 9 Jul 2006 at 19:12, Martin K wrote: > Does anyone have any source recommendations for gate drive transformers? > Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free > samples but I'm looking for something that wouldn't be ridiculously > expensive for low-volume use. For triacs or MOSFETs? Cheers, Bob

MOSFETs I'd really like a 5 winding (1:1:1:1:1) for a full bridge converter, but also a set of 1:1:1s for a full bridge ZVT converter. I wound one of my own on a surplus ferrite pot core but it's HUGE and impractical (works well though). Thanks for any info Bob. -- Martin K Bob Blick wrote: {Quote hidden}>On 9 Jul 2006 at 19:12, Martin K wrote: > > > >>Does anyone have any source recommendations for gate drive transformers? >>Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free >>samples but I'm looking for something that wouldn't be ridiculously >>expensive for low-volume use. >> >> > >For triacs or MOSFETs? > >Cheers, > >Bob > > >

Ask for a Digikey catalog (thei web page sucks) and take a look to the coil sections. There are some ceaper transformers than Coilcraft. Do you know why Coilcraft is expensive ? Because it has isolated package on the coil and a resin inside. The coil will never made short circuits and will not singing... Maybe $6 is a good choice for some applications ? greetings, Vasile On 7/10/06, Martin K <spam_OUTmartin-distlistsTakeThisOuTnnytech.net> wrote: > Does anyone have any source recommendations for gate drive transformers? > Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free > samples but I'm looking for something that wouldn't be ridiculously > expensive for low-volume use. > > Thanks. > -- > Martin K > -

> MOSFETs > I'd really like a 5 winding (1:1:1:1:1) for a full bridge converter, but > also a set of 1:1:1s for a full bridge ZVT converter. I wound one of my > own on a surplus ferrite pot core but it's HUGE and impractical (works > well though). Don't know of any 5 winding ones, but for 1:1:1 look at mouser.com part number 580-786028C about $1.50 in small qty. Various other inductances available at the same price if you are running particularly fast/slow. Also in SMD packages, change the suffix to MC. Cheers, Bob

Vasile Surducan wrote: > Ask for a Digikey catalog (thei web page sucks) and take a look to the > coil sections. There are some ceaper transformers than Coilcraft. Do > you know why Coilcraft is expensive ? Because it has isolated package > on the coil and a resin inside. The coil will never made short > circuits and will not singing... > Maybe $6 is a good choice for some applications ? > > greetings, > Vasile > > On 7/10/06, Martin K <.....martin-distlistsKILLspam@spam@nnytech.net> wrote: > >> Does anyone have any source recommendations for gate drive transformers? >> Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free >> samples but I'm looking for something that wouldn't be ridiculously >> expensive for low-volume use. >> >> Thanks. >> -- >> Martin K >> --

On 7/9/06, Vasile Surducan <piclist9KILLspamgmail.com> wrote: > Ask for a Digikey catalog (thei web page sucks) and take a look to the > coil sections. There are some ceaper transformers than Coilcraft. Do > you know why Coilcraft is expensive ? Because it has isolated package > on the coil and a resin inside. The coil will never made short > circuits and will not singing... > Maybe $6 is a good choice for some applications ? > > greetings, > Vasile What's wrong with the web page? I've always thought it best of all the electronic distributors. Faint praise, I know. Regards, Mark markrages@gmail -- You think that it is a secret, but it never has been one. - fortune cookie

Thanks Bob. I'm still surprised by suppliers' lack of interest in magnetics other than 60Hz transformers, ethernet transformers, or inductors. I can't be the only one who needs low volume SMPS transformers (or am I?) Arnold has a nice selection of high-B capable toroids, but winding them is a bear. I'd much rather wind a two-piece core but they tend to be significantly more expensive anyway. I get the feeling a lot of these companies aren't too interested in helping me unless I'm going to order Qty. >1,000. -- Martin K Bob Blick wrote: {Quote hidden}>On 9 Jul 2006 at 19:12, Martin K wrote: > > > >>Does anyone have any source recommendations for gate drive transformers? >>Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free >>samples but I'm looking for something that wouldn't be ridiculously >>expensive for low-volume use. >> >> > >For triacs or MOSFETs? > >Cheers, > >Bob > > >

>Does anyone have any source recommendations for gate drive >transformers? Coilcraft wants $6.50 for a 1:1:1 transformer. >I know I can get free samples but I'm looking for something >that wouldn't be ridiculously expensive for low-volume use. I have a couple of samples of Vanguard Electronics GD203. Haven't tried them yet. http://www.ve1.com/index.htm

Thanks Bob! They're backordered until late August, but they are the least expensive ones I've found. -- Martin Bob Blick wrote: {Quote hidden}>> MOSFETs >> I'd really like a 5 winding (1:1:1:1:1) for a full bridge converter, but >> also a set of 1:1:1s for a full bridge ZVT converter. I wound one of my >> own on a surplus ferrite pot core but it's HUGE and impractical (works >> well though). >> > > Don't know of any 5 winding ones, but for 1:1:1 look at mouser.com part > number 580-786028C about $1.50 in small qty. Various other inductances > available at the same price if you are running particularly fast/slow. > Also in SMD packages, change the suffix to MC. > Cheers, > > Bob > > >

FWIW: I found that Coilcraft does have SMT 1:1:1 transformers for a reasonable price ($1.x) in low quantity. -- Martin K Martin Klingensmith wrote: {Quote hidden}> Thanks Bob. > I'm still surprised by suppliers' lack of interest in magnetics other > than 60Hz transformers, ethernet transformers, or inductors. I can't be > the only one who needs low volume SMPS transformers (or am I?) > Arnold has a nice selection of high-B capable toroids, but winding them > is a bear. I'd much rather wind a two-piece core but they tend to be > significantly more expensive anyway. I get the feeling a lot of these > companies aren't too interested in helping me unless I'm going to order > Qty. >1,000. > > -- > Martin K > > Bob Blick wrote: > > >> On 9 Jul 2006 at 19:12, Martin K wrote: >> >> >> >> >>> Does anyone have any source recommendations for gate drive transformers? >>> Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free >>> samples but I'm looking for something that wouldn't be ridiculously >>> expensive for low-volume use. >>> >>> >>> >> For triacs or MOSFETs? >> >> Cheers, >> >> Bob >> >> >> >> > > >