The MAX9737 mono 7 W Class D amplifier provides high‑performance, thermally efficient audio amplification. It operates from an 8 V to 28 V supply, delivers up to 88 % efficiency, and includes features such as spread‑spectrum modulation, click‑and‑pop suppression, and a shutdown mode that reduces supply current to less than 1 µA.
The device is supplied in a 24‑pin TQFN‑EP package and is specified for temperatures from –40 °C to +85 °C. It offers a high 80 dB power‑supply rejection ratio, a typical turn‑on time under 10 ms, and protection mechanisms including current‑limit (4.6 A) and thermal shutdown (+160 °C).
| Supply Voltage Range | 8 V to 28 V |
|---|---|
| Maximum Output Power | 7 W |
| Efficiency | up to 88 % |
| Power‑Supply Rejection Ratio (PSRR) | 80 dB |
| Shutdown Supply Current | < 1 µA |
| Turn‑On Time | < 10 ms |
| Output Current Limit | 4.6 A (typ) |
| Package | 24‑pin TQFN‑EP |
The MAX9737 operates from 8 V to 28 V.
In shutdown mode the device draws less than 1 µA.
The amplifier turns on in less than 10 ms without clicks or pops.
The device can achieve up to 88 % efficiency.