The MAX9709 is a Class D audio power amplifier from Texas Instruments. It offers high efficiency, low power consumption, and high output power.
The MAX9709 is a stereo/mono Class D audio power amplifier that delivers up to 2 × 25 W into an 8 Ω load in stereo mode and 1 × 50 W into a 4 Ω load in mono mode, achieving up to 87 % efficiency. It operates from a single +10 V to +22 V supply and offers both fixed‑frequency and spread‑spectrum modulation, with optional clock synchronization for cascading multiple units.
The device is supplied in a 56‑pin thin‑profile QFN package, supports fully differential inputs, programmable gain (22 dB, 25 dB, 29.5 dB, 36 dB), click‑and‑pop suppression, and includes short‑circuit and thermal‑overload protection with a programmable thermal flag. Typical applications include LCD/PDTVs, automotive audio, and PC/Hi‑Fi solutions.
| Mono Output Power | 1 × 50 W |
|---|---|
| Efficiency | up to 87 % |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 56‑pin TQFN |
Yes, the MAX9709 offers a spread‑spectrum modulation (SSM) mode that reduces EMI‑radiated emissions.