LM4853 Datasheet, PDF (1/25 Pages) National Semiconductor (TI) – Mono 1.5 W / Stereo 300mW Power Amplifier

LM4853
www.ti.com
SNAS155E – JANUARY 2002 – REVISED MAY 2013
LM4853
Mono 1.5 W / Stereo 300mW Power Amplifier
Check for Samples: LM4853
FEATURES
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•2 Mono 1.5W BTL or Stereo 300mW Output
• Headphone Sense
• “Click and Pop” Suppression Circuitry
• No Bootstrap Capacitors Required
• Thermal Shutdown Protection
• Unity-Gain Stable
• Available in Space-Saving VSSOP and WSON
Packaging
APPLICATIONS
• Portable Computers
• Desktop Computers
• PDA's
• Handheld Games
KEY SPECIFICATIONS
• Output Power at 1% THD+N, 1kHz:
– LM4853LD 3Ω BTL 1.9W (typ)
– LM4853LD 4Ω BTL 1.7W (typ)
– LM4853MM 4Ω BTL 1.5W (typ)
– LM4853MM,LD 8Ω BTL 1.1W (typ)
– LM4853MM,LD 8Ω SE 300mW (typ)
– LM4853MM,LD 32Ω SE 95mW (typ)
• THD+N at 1kHz, 95mW into 32Ω SE 1% (typ)
• Single Supply Operation 2.4 to 5.5V
• Shutdown Current 18µA (typ)
DESCRIPTION
The LM4853 is an audio power amplifier capable of
delivering 1.5W (typ) of continuous average power
into a mono 4Ω bridged-tied load (BTL) with 1%
THD+N or 95mW per channel of continuous average
power into stereo 32Ω single-ended (SE) loads with
1% THD+N, using a 5V power supply.
The LM4853 can automatically switch between mono
BTL and stereo SE modes utilizing a headphone
sense pin. It is ideal for any system that provides
both a monaural speaker output and a stereo line or
headphone output
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. Since the
LM4853 does not require bootstrap capacitors or
snubber networks, it is optimally suited for low-power
portable systems.
The LM4853 features an externally controlled,
micropower consumption shutdown mode and
thermal shutdown protection. The unity-gain stable
LM4853's gain is set by external gain-setting resistors
Connection Diagram
Figure 1. 10 Lead VSSOP – Top View
Figure 2. 14 Lead WSON – Top View
See Package Number DGS
See Package Number NHE0014A
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2
PRODUCTION DATA information is current as of publication date.
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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