MAX9717BEBL+T

Audio Amplifiers Overview

The MAX9717BEBL+T is a mono, bridge-tied load (BTL) audio power amplifier designed for portable devices with internal speakers. It operates from a single 2.7V to 5.5V supply and delivers 1.4W continuous power into a 4Ω load at 1% THD+N when powered by 5V. With an 8Ω load, it provides 1W at 5V and 350mW at 3.0V. The device features internally fixed gain of 6dB, reducing external component count. It includes a headphone sense input (BTL/SE) that automatically switches between BTL speaker mode and single-ended headphone mode. Quiescent current drops to less than 10nA in shutdown mode.

Audio Amplifiers Feature Summary

• Bridge-tied load architecture minimizes external components while delivering high-quality audio reproduction.
• Integrated headphone sense input detects connected headphones and disables the BTL slave driver for single-ended operation.
• Comprehensive click-and-pop suppression circuitry reduces audible artifacts during startup and shutdown sequences.
• Low-power shutdown mode disables bias generators and amplifiers to minimize quiescent current consumption.

Audio Amplifiers Applications

• Mobile phones
• Personal digital assistants (PDAs)
• Portable electronic devices

Audio Amplifiers Procurement Notes

Verify the specific suffix +T indicates tape-and-reel packaging and + denotes lead-free/RoHS compliance as per Maxim Integrated documentation. Confirm the EBBL suffix corresponds to the 9-bump UCSP package type. Ensure the operating temperature range matches the -40°C to +85°C specification for your application environment. Cross-reference the part number against the official selector guide to confirm the 6dB fixed gain configuration.

Audio Amplifiers Selection Notes

Select this component when a fixed 6dB gain is required without external resistors. It is suitable for applications needing automatic headphone detection via the BTL/SE pin. Compare against adjustable gain variants if software-controlled volume adjustment is necessary. Consider thermal dissipation requirements for the UCSP package under high output power conditions. Verify compatibility with single-supply voltages between 2.7V and 5.5V.

Audio Amplifiers Part Context

This part belongs to the MAX9716/MAX9717 family of low-cost, mono audio power amplifiers. It shares pinout and functional similarities with the LM4890 and TPA711, though specific gain configurations differ. The MAX9717 series distinguishes itself with the integrated headphone sense feature absent in the MAX9716. Available packages include UCSP, TDFN, and µMAX, offering flexibility for space-constrained portable designs.

Audio Amplifiers Replacement Considerations

The MAX9716 is pin-compatible but lacks the headphone sense input and has adjustable gain. Other MAX9717 variants (A, C, D) share the same package and functionality but differ in fixed gain settings (Adjustable, 9dB, 12dB respectively). Verify that substitute parts maintain the 6dB gain requirement and BTL/SE sensing capability.

Audio Amplifiers FAQ

How does the BTL/SE input function?

Driving the BTL/SE input low enables the slave amplifier for BTL speaker operation. Driving it high disables the slave amplifier, muting the speaker and configuring the output for single-ended headphone driving.

What is the fixed gain of the MAX9717B variant?

The MAX9717B variant features an internally fixed voltage gain of 6dB, eliminating the need for external gain-setting resistors.

How is click-and-pop suppression achieved?

During startup, the common-mode bias voltage ramps to the DC bias level. During shutdown, outputs are pulled to ground through an internal resistor, minimizing energy in the audio band to prevent audible transients.