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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
1
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 16Ω 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)
• Power Output at V
DD
= 3V, R
L
= 16Ω, THD ≦≦
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.
2Boomer is a trademark of Texas Instruments.
3All 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.
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