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LM4870NSN/a40avai1.1W Audio Power Amplifier with Shutdown Mode


LM4870 ,1.1W Audio Power Amplifier with Shutdown ModeApplicationsshutdown protection mechanism. It also includes two head-phone control inputs and a hea ..
LM4870M ,1.1W Audio Power Amplifier with Shutdown ModeApplicationsternal monitoring. The LM4870 is unity-gain stable and then Personal computersgain is s ..
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LM4870
1.1W Audio Power Amplifier with Shutdown Mode
LM4870
1.1W Audio Power Amplifier with Shutdown Mode
General Description

The LM4870isa bridge-connected audio power amplifierca-
pableof delivering 1.1Wof continuous average powertoan load with lessthan 0.5% THD+N overthe audio spectrum
froma5V power supply.
Boomer audio power amplifiers were designed specificallyto
provide high quality output power witha minimal numberof
external components. Since the LM4870 does not require
output coupling capacitors, bootstrap capacitorsor snubber
networks,itis optimally suitedfor low-power portable sys-
tems.
The LM4870 featuresan externally controlled, low-power
consumption shutdown mode,as wellasan internal thermal
shutdown protection mechanism.It also includes two head-
phone control inputs anda headphone sense outputfor ex-
ternal monitoring. The LM4870is unity-gain stable and the
gainisset using external resistors.
Key Specifications
THD+Nat 1W into8Ω 0.5% (max) Output power into8Ωat 1kHzat 10% THD+N 1.5W (typ) Shutdown Current 0.6μA (typ)
Features
No output coupling capacitors, bootstrap capacitors,or
snubber circuits are necessary Small Outline (SOIC) power packaging Unity-gain stable External gain configuration capability
Applications
Personal computers Desktop computers Low voltage audio system
Typical Application Connection Diagram

DS100094-1
FIGURE1. Typical Audio Amplifier Application Circuit
Small Outline Package

DS100094-2
Top View
Order Number LM4870M
See NS Package Number M16A

August 2000
LM4870
1.1W
Audio
Power
Amplifier
with
Shutdown
Mode
ic,good price


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