Boomer Series: 1.1W Audio Amplifier with Shutdown Mode - LM4861

LM4861 (ACTIVE)

Boomer Series: 1.1W Audio Amplifier with Shutdown Mode

 

Description

The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8Ω load with 1% THD+N using a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.

The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation.

Features

  • No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
  • Small Outline (SOIC) packaging
  • Compatible with PC power supplies
  • Thermal shutdown protection circuitry
  • Unity-gain stable
  • External gain configuration capability

Key Specifications

  • THD+N for 1kHz at 1W continuous average output power into 8Ω 1.0% (max)
  • Output power at 10% THD+N at 1kHz into 8Ω 1.5 W (typ)
  • Shutdown Current 0.6µA (typ)

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Parametrics Compare all products in Speaker Amplifier Class AB/Class D

 
Speaker Amp Type
Output Power (W)
PSRR (dB)
Audio Input Type
Operating Temperature Range (C)
Rating
Iq per channel (Typ) (mA)
Speaker Channels (Max)
Analog Supply (V) (Max)
Analog Supply (V) (Min)
Shutdown Current (ISD) (uA)
Approx. Price (US$)
LM4861
Class-AB   
1.6   
65   
Analog Input   
-40 to 85   
Catalog   
6.5   
Mono   
5.5   
2   
0.6   
0.69 | 1ku