Maxim Integrated MAX9744ETH+, Class D audio amplifier, 2-Channel (Stereo), 22.5W x 2 @ 4Ω, 4.5V to 14V supply, 44-TQFN (7x7) exposed pad, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Type | Class D |
| Output type | 2-Channel (Stereo) |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 14V |
| Max output power x channels @ load | 22.5W x 2 @ 4Ohm |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tube |
| Features | Depop, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control |
| Case | 44-WFQFN Exposed Pad |
Depop, mute, short-circuit and thermal protection, shutdown, and volume control are all on-chip. That means no external muting FETs, no separate protection supervisor, and no volume pot — the I²C volume control handles level setting from the system processor.
No LTB or NRND notices are in effect.
It delivers 22.5W per channel into a 4Ω load, stereo output.
No external bootstrap capacitor is needed — the integrated Class D output stage handles the bootstrap internally. The datasheet covers the full pinout and recommended external components.
Class D amplifiers typically achieve >85% efficiency at full output. The exact efficiency curve is in the datasheet.
Yes, it is rated for 22.5W per channel into 4Ω. It can drive 4Ω speakers.