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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

Product Details

Key Features

Parametric specs for Speaker Amplifiers
# Channels 1
Class AB
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 4.3
POUT into 4Ω @ 1% THD+N (W) (min) 1.4
POUT into 4Ω @ 10% THD+N (W) (min) 2
POUT into 8Ω @ 1% THD+N (W) (min) 1.1
POUT into 8Ω @ 10% THD+N (W) (min) 1.3
Spkr. Amp. Half Pwr. THD+N (%) 0.02
SNR (dB) (A- Weighted) 108
PSRR (dB) (min) 80
Package/Pins TDFN/8
UMAX/8
Budgetary
Price (See Notes)
0.51
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Simplified Block Diagram

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Parameters

Parametric specs for Speaker Amplifiers
# Channels 1
Class AB
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 4.3
POUT into 4Ω @ 1% THD+N (W) (min) 1.4
POUT into 4Ω @ 10% THD+N (W) (min) 2
POUT into 8Ω @ 1% THD+N (W) (min) 1.1
POUT into 8Ω @ 10% THD+N (W) (min) 1.3
Spkr. Amp. Half Pwr. THD+N (%) 0.02
SNR (dB) (A- Weighted) 108
PSRR (dB) (min) 80
Package/Pins TDFN/8
UMAX/8
Budgetary
Price (See Notes)
0.51

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

Applications/Uses

  • Mobile Phones
  • PDAs
  • Portable Devices

Description

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.

Simplified Block Diagram

MAX9716, MAX9717: Pin Configuration MAX9716, MAX9717: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .