lmp8672ma amplifier

Hello Edery,

The LMP8672 is a medium power, low noise device that does draw significant quiescent current.

At 40V, the '72 draws 12.5mA. 12.5mA x 40V = 0.500W, or half a watt just by itself - not including any load currents.

With a package thermal resistance of 145°C/W, the temperature will rise 72°C above ambient (97°C assuming 25°C ambient).

You can help keep it cool by using thick traces on the power supply and output pins to help draw the heat out. This increases the heatsink area and helps spread the heat out into the board. As a rule of thumb, it is getting too hot if a drop of water sizzles when applied to the package.

So what you are seeing is "normal", but you do need to be aware of the excess heat. Particularly if you are driving heavy output loads that would increase the dissipation further.

Regards,

do you know another amplifier that can have input +-10v and output +-15v .

how did you calculate the heat of the component?