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LM4917 데이터시트(PDF) 1 Page - Texas Instruments

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부품명 LM4917
상세설명  Audio Power Amplifier Series Ground-Referenced, 95mW Stereo Headphone Amplifier
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제조업체  TI1 [Texas Instruments]
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LM4917
www.ti.com
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 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)
Power Output at VDD = 3V, RL = 16Ω, THD ≦
1%: 95mW (Typ)
Shutdown Current: 0.01µA (Typ)
1
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.
2
Boomer is a trademark of Texas Instruments.
3
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.


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