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MAX9717：Low-Cost, Mono, 1.4W BTL Audio Power Amplifiers

Low-Cost Speaker Amplifiers Offer Up to 1.3W into 4Ω, Headphone Sensing, and Pin-for-Pin Compatible Packaging

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 supply. 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 suppression that reduces audible clicks and pops during startup and shutdown. The MAX9717 features a headphone sense input (active-low 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 extended temperature range.

Key Features 2.7V to 5.5V Single-Supply Operation 1.4W into 4Ω at 1% THD+N 10nA Low-Power Shutdown Mode 73dB PSRR at 1kHz No Audible Clicks or Pops at Power-Up/Down Internal Fixed Gain to Reduce Component Count (MAX9717B/C/D) Adjustable Gain Option (MAX9716/MAX9717A) Active-Low BTL/SE Input Senses when Headphones are Connected (MAX9717) Pin Compatible with LM4890 (MAX9716) Pin Compatible with TPA711 (MAX9717A) Available in Compact, Thermally Enhanced µMAX and TDFN (3mm x 3mm) Packages

MAX9716, MAX9717: Pin Configuration Applications/Uses Mobile Phones PDAs Portable Devices

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