LM48511: LM48511 Schematic

Kevin.Peng

Part Number: LM48511

Hi Team,

Please help check if the circuit needs adjustment.
1. Condition Vin 5V Output 4 ohm 3W~3.5W
2. Is the circuit part value correct?
3. As shown below

thanks

Kevin

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Kevin,

I'm reviewing the schematic that you attached. I will reply as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Luis Fernando Rodriguez S.

TI__Guru* 84915 points

Hi, Kevin,

The schematic is correct. However, the component values in the schematic will reach more than 3W in this case. For a 4ohms load, you will reach around 5.4-6.7W. Please take a look at the electrical characteristics section below for details (the section 6.5 contains the parameters under the same conditions of the schematic that you attached).

http://www.ti.com/lit/ds/symlink/lm48511.pdf#page=6

If you are looking for a lower output power level, I would recommend to replace the resistors R1393 and R1394 for 10K resistors. These resistors will result in a unity gain (Av = 1) instead of the double (Av = 2). The output power will be then 2.7W to 3.35W.

Please let me know if you have questions or comments on this.

Best regards,
Luis Fernando Rodríguez S.

0 Kevin.Peng over 5 years ago in reply to Luis Fernando Rodriguez S.

Intellectual 780 points

Hi Luis,

Thanks for your support.

Kevin

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LM48511: LM48511 Schematic