Look here and scroll down:
Assembled L25D Stero Power Amplifier board IRS2092 IRFB4020PBF 250W 8ohm | eBay
Assembled L25D Stero Power Amplifier board IRS2092 IRFB4020PBF 250W 8ohm | eBay
Your SMPS must be a dual supply; e.g., +/-V. You can't just connect a single supply from +V to -V.I am using a smps. Do I connect the negative terminal to the V- post of the power supply?
I built one with L20d and the SMPS800r of Connexelectronic.
Please look at this picture: <** Click this Link for Large picture **>
From your questions I get the impression you have no idea what you are doing, how to connect power supplies or how to interpret schematics (excuse me if I'm wrong). And although this amp is not so difficult to put together - it's connecting wires and not much more - this is certainly not a NEWB project. +/- 60VDc is killing.
Maarten
Please look at this picture: <** Click this Link for Large picture **>
- The -out terminal of the SMPS needs to be connected to the V- terminal at the amp board (yellow wire)
- The ground terminal at the SMPS (o Vdc, black wire) is connected to the terminal on the amp board together with the GND speaker out.
- the +out terminal of the SMPS need to be connected to the +Vdc terminal at the amp board (see red wire)
- The thick Blue and Red wires at the amp board are connected to the speaker terminals
From your questions I get the impression you have no idea what you are doing, how to connect power supplies or how to interpret schematics (excuse me if I'm wrong). And although this amp is not so difficult to put together - it's connecting wires and not much more - this is certainly not a NEWB project. +/- 60VDc is killing.
Maarten
Contrary to the diagram on the eBay page that activexp linked to, the negative terminal from the speaker should connect to the amp board, and NOT to the power supply, as platenspeler described and hopefully his picture clarifies. Otherwise, the output load current would be flowing through the wires from the supplies, increasing losses and loop area.I meant negative terminal from the speaker to power supply? Or amp board?
I am using a sms800r from connexelectronic.
Contrary to the diagram on the eBay page that activexp linked to, the negative terminal from the speaker should connect to the amp board, and NOT to the power supply, as platenspeler described and hopefully his picture clarifies. Otherwise, the output load current would be flowing through the wires from the supplies, increasing losses and loop area.
I thought that's what I said ... but indeed speaker ground and amp ground connect together to amp board.
Maarten
Contrary to the diagram on the eBay page that activexp linked to, the negative terminal from the speaker should connect to the amp board, and NOT to the power supply, as platenspeler described and hopefully his picture clarifies. Otherwise, the output load current would be flowing through the wires from the supplies, increasing losses and loop area.
I thought that's what I said ... but indeed speaker ground and amp ground connect together to amp board.
Maarten
You did say it. I just wanted to emphasize that the previously referenced diagram was incorrect and misleading. Your linked picture clarifies everything.I thought that's what I said
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Class D
- Help a newb wire L25D