Hi .
All I have is from valveaudio.tripod.com .
I have been also searching for any car amp. service manual (www, *****, etc..) and no luck .
I have found http://fileshare.eshop.bg to have some car audio service manuals but it don't alowe me to download anything 🙁
Greeting ..
All I have is from valveaudio.tripod.com .
I have been also searching for any car amp. service manual (www, *****, etc..) and no luck .
I have found http://fileshare.eshop.bg to have some car audio service manuals but it don't alowe me to download anything 🙁
Greeting ..
K****D Service Manuals
I have a huge number of service manuals. What things do you want to know about them?
Cheers
Matt
I have a huge number of service manuals. What things do you want to know about them?
Cheers
Matt
The output voltage of the power supply depends on the transfer function of the opto coupler. I wouldn't use it in a car amp, it'll likely drift badly over temperature.
Re: K****D Service Manuals
Hi
Well if you can post some service manual of some simple car. amp. with smps. Im interesten in schematics, to see how is constructed ? (with sg3525 if possible)
bye
mrgtir said:
Hi
Well if you can post some service manual of some simple car. amp. with smps. Im interesten in schematics, to see how is constructed ? (with sg3525 if possible)
bye
Re:Service manuals
Ok
I like to have the service manuals of kenwood car amplifiers "kac"
If you have service manuals of kenwood car amp. kac-626 please send me on my e-mail risto44091@hotmail.com
The SMPS of kenwood car amplifiers are very simple to build and my kac-626 is broken sow I like to repair but I dont have the service manual.
If you have the service manulas please send me and i will send you Lott os materials for making car amplifiers.
Yours faithfyllu
Risto Panovski from Macedonia
Ok
I like to have the service manuals of kenwood car amplifiers "kac"
If you have service manuals of kenwood car amp. kac-626 please send me on my e-mail risto44091@hotmail.com
The SMPS of kenwood car amplifiers are very simple to build and my kac-626 is broken sow I like to repair but I dont have the service manual.
If you have the service manulas please send me and i will send you Lott os materials for making car amplifiers.
Yours faithfyllu
Risto Panovski from Macedonia
hi all of you,
I built that smps but both the mosfet are buz11 and it is heated very much and the smps is taking 7amp. to 9amp. without any load at output power so please hint about it
I built that smps but both the mosfet are buz11 and it is heated very much and the smps is taking 7amp. to 9amp. without any load at output power so please hint about it
Tranzistors from amp are very hot
I have tried the amp and it's sound verry good.But the output tranzistors were very hot.One man told me the bias adjusment but this bias adjusment is not present on this car amplifier.The secon one is oscillating if this amplifier do that what kind i do to stoped.
I have tried the amp and it's sound verry good.But the output tranzistors were very hot.One man told me the bias adjusment but this bias adjusment is not present on this car amplifier.The secon one is oscillating if this amplifier do that what kind i do to stoped.
Re: K****D Service Manuals
If you can post pioneer model GM-X564 or any other model of pioneer car amplifier service manual with smps. I am interested in schematics.
Himrgtir said:
If you can post pioneer model GM-X564 or any other model of pioneer car amplifier service manual with smps. I am interested in schematics.
troubleshooting smps
Greetings,
I looked over the schematic and observed a few things. The SG3525 is a *voltage* mode controller (VMC). The topology is a push-pull center-tap (PPCT). One issue with the PPCT (as well as half-bridge, and full-bridge) is core saturation due to unequal pulse widths applied to each half of the primary. Once saturated, the transformer primary magnetizing current increases dramatically, and that may be why the FETs are getting hot. The two classical methods to avoid saturation with a PPCT are a coupling capacitor between the 12V input and the primary center tap, or the use of a *current* mode controller (CMC). Also, the 100 ohm gate resistors in each FET are very high in value. The FETs will not switch fast enough. I would use around 4.7 ohms instead. I hope this helps. Best regards.
Greetings,
I looked over the schematic and observed a few things. The SG3525 is a *voltage* mode controller (VMC). The topology is a push-pull center-tap (PPCT). One issue with the PPCT (as well as half-bridge, and full-bridge) is core saturation due to unequal pulse widths applied to each half of the primary. Once saturated, the transformer primary magnetizing current increases dramatically, and that may be why the FETs are getting hot. The two classical methods to avoid saturation with a PPCT are a coupling capacitor between the 12V input and the primary center tap, or the use of a *current* mode controller (CMC). Also, the 100 ohm gate resistors in each FET are very high in value. The FETs will not switch fast enough. I would use around 4.7 ohms instead. I hope this helps. Best regards.
himanshuraval said:
Check gate resistors ! I have one time placed to gate of one mosfet wrong resistor and I haved similar problem .
a coupler cap between 12v input and the centretap on the primary side, care to explain in more detail? 🙂
Grucho said:
hi grucho,
i have used 100ohms at all four mosfet and my toroid's core size is 35mm(outer dia)x15mm(hight) and winding is 4x4 pri. 12x12 sec.turns but buz11 is heatiing within 5 seconds
hi risto,
please what is your core size and winding data with wire gauge wich you used with your this smps
please what is your core size and winding data with wire gauge wich you used with your this smps
himanshuraval,
Just a question, are you using a heatsink for the mosfets?
I am using the following circuit and it work perfectly. I am still working with two types of cores (toroid and ETD39)...for now the toroid is performing better and much easier to wind..
Just a question, are you using a heatsink for the mosfets?
I am using the following circuit and it work perfectly. I am still working with two types of cores (toroid and ETD39)...for now the toroid is performing better and much easier to wind..
An externally hosted image should be here but it was not working when we last tested it.
Hi.
Remove transformer, and check mosfets, they should be cold when smps is runing.
I run my smps mosfets without heatsink, and they are cold under small load.
Current without load is from 100mA-500mA.
Remove transformer, and check mosfets, they should be cold when smps is runing.
I run my smps mosfets without heatsink, and they are cold under small load.
Current without load is from 100mA-500mA.
himanshuraval said:
Grucho said:
hi grucho
wich schematic do you use please and please send with pcb if you have layout
Tico70:
How to winding the transformer? How many turns have you used for primary and secondary?
TIA.
How to winding the transformer? How many turns have you used for primary and secondary?
TIA.
hi powerp,powerp said:
my troroid core size is 45mm(outer dia) x 10mm and winding is pri:4x4 turns and sec: 12x12turns
hi gruchoGrucho said:
i have removed transformer and check mosfet that is properly working and no consupt currunt but i removed first secondry of transformer and check and thats no consupt current but when i connect the dc circuit the circuit take much current and then after i removed power caps of dc output smps is running with about 900ma to 1amp. without any load at dc output