LM4917

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SNAS238G – AUGUST 2004 – REVISED MAY 2013

LM4917 Boomer™ Audio Power Amplifier Series Ground-Referenced, 95mW Stereo

Headphone Amplifier

Check for Samples: LM4917

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FEATURES

DESCRIPTION

The LM4917 is a stereo, output capacitor-less

23

•

Ground Referenced Outputs

headphone amplifier capable of delivering 95mW of

•

High PSRR

continuous average power into a 16

Ω load with less

•

Available in Space-Saving TSSOP Package

than 1% THD+N from a single 3V power supply.

•

Ultra Low Current Shutdown Mode

The LM4917 provides high quality audio reproduction

•

Improved Pop and Click Circuitry eliminates

with

minimal

external

components.

A

ground

referenced output eliminates the output coupling

Noises During Turn-On and Turn-Off

capacitors typically required by single-ended loads,

Transitions

reducing component count, cost and board space

•

1.4 – 3.6V Operation

consumption. This makes the LM4917 ideal for

•

No Output Coupling Capacitors, Snubber

mobile phones and other portable equipment where

Networks, Bootstrap Capacitors

board space is at a premium. Eliminating the output

coupling capacitors also improves low frequency

•

Shutdown Either Channel Independently

response.

APPLICATIONS

The LM4917 operates from a single 1.4V to 3.6V

power supply, features low 0.02% THD+N and 70dB

•

Notebook PCs

PSRR.

Independent

right/left

channel

low-power

•

Desktop PCs

shutdown controls provide power saving flexibility for

•

Mobile Phone

mono/stereo applications. Superior click and pop

suppression eliminates audible transients during start

•

PDAs

up and shutdown. Short circuit and thermal overload

•

Portable Electronic Devices

protection protects the device during fault conditions.

KEY SPECIFICATIONS

•

Improved PSRR at 1kHz: 70dB (Typ)

•

≦

1%: 95mW (Typ)

•

Shutdown Current: 0.01µA (Typ)

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Boomer is a trademark of Texas Instruments.

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All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.