The MAX9716/MAX9717 audio power amplifiers are ideal for portable audio devices with internal speakers. A bridge-tied load (BTL) architecture minimizes external component count, while providing high-quality audio reproduction. Both devices deliver 1.4W continuous power into a 4Ω load with less than 1% Total Harmonic Distortion (THD) while operating from a single +5V sup- ply. With an 8Ω load, both devices deliver 1W continuous power. These devices also deliver 350mW continuous power into an 8Ω load while operating from a single +3.0V supply. The devices are available as adjustable gain amplifiers (MAX9716/MAX9717A) or with internally fixed gains of 6dB, 9dB, and 12dB (MAX9717B/ MAX9717C/MAX9717D), reducing component count. A low-power shutdown mode disables the bias generator and amplifiers, reducing quiescent current consumption to less than 10nA. These devices feature Maxim’s industry-leading, comprehensive click-and-pop sup- pression that reduces audible clicks and pops during startup and shutdown. The MAX9717 features a headphone sense input (BTL/SE) that senses when a headphone is connected to the device, disables the BTL slave driver, muting the speaker while driving the headphone as a single-ended load. The MAX9716 is pin compatible with the LM4890 and is available in 9-bump UCSP™, 8-pin TDFN (3mm x 3mm), and 8-pin µMAX® packages. The MAX9717 is available in 9-bump UCSP, 8-pin TDFN, and 8-pin µMAX packages. Both devices operate over the -40°C to +85°C
The MAX9716 and MAX9717 are mono audio power amplifiers designed for portable devices with internal speakers. They operate from a single 2.7 V to 5.5 V supply, deliver up to 1.4 W continuous into a 4 Ω load with less than 1 % THD, and feature a low‑power shutdown mode that reduces quiescent current to under 10 nA.
The devices are available in adjustable‑gain (MAX9716/MAX9717A) and fixed‑gain (MAX9717B/C/D) versions, and come in compact 8‑pin TDFN, µMAX, and 9‑bump UCSP packages. They include industry‑leading click‑and‑pop suppression and, for the MAX9717, a headphone‑sense input that mutes the speaker when a headphone is connected.
| Supply Voltage | 2.7 V to 5.5 V |
|---|---|
| Output Power (4 Ω load) | 1.4 W continuous |
| Output Power (8 Ω load) | 1 W continuous |
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum Junction Temperature | +150 °C |
| Power‑Supply Rejection Ratio (1 kHz) | 73 dB |
The amplifiers operate from a single 2.7 V to 5.5 V supply.
It can deliver 1.4 W continuous power with less than 1 % THD.
Yes, it includes a BTL/SE input that detects a connected headphone and mutes the speaker.