Oznog
Active Member
I need to run a 32 ohm headphone off of 3.3v, but an output voltage of around 3V peak-to-peak has proven to be somewhat inadequate for my needs.
I would like to have a cheap dual-output IC that runs nearly rail-to-rail outputs and is capable of bridge mode. With bridge mode I can get closer to 6V peak-to-peak which has proven to be quite adequate.
It's for an in-headset amplifier, where I have 2 separate wires from each speaker accessible. In fact, I actually need 2 bridged outputs so an ideal part would have quad outputs I can use as 2 bridges.
Actually I got a TEA2025 dual amp which was spec'd as being able to operate off of 3.3v. I soon realized that was somewhat of an exaggeration, its outputs are pretty far from the rail on 3.3v especially at lower frequencies where the speaker has a lower impedance and thus needs to draw more current. It clipped rather easily. I need something closer to a rail-to-rail part.
I would like to have a cheap dual-output IC that runs nearly rail-to-rail outputs and is capable of bridge mode. With bridge mode I can get closer to 6V peak-to-peak which has proven to be quite adequate.
It's for an in-headset amplifier, where I have 2 separate wires from each speaker accessible. In fact, I actually need 2 bridged outputs so an ideal part would have quad outputs I can use as 2 bridges.
Actually I got a TEA2025 dual amp which was spec'd as being able to operate off of 3.3v. I soon realized that was somewhat of an exaggeration, its outputs are pretty far from the rail on 3.3v especially at lower frequencies where the speaker has a lower impedance and thus needs to draw more current. It clipped rather easily. I need something closer to a rail-to-rail part.