300 mW Audio Power Amplifier with Shutdown Mode - LM4864

LM4864 (ACTIVE)

300 mW Audio Power Amplifier with Shutdown Mode

 

Description

The LM4864 is a bridged audio power amplifier capable of delivering 725mW of continuous average power into an 8Ω load with 1% THD+N from a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power from a low supply voltage while requiring a minimal amount of external components. Since the LM4864 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications.

The LM4864 features an externally controlled, low power consumption shutdown mode, and thermal shutdown protection.

The closed loop response of the unity-gain stable LM4864 can be configured by external gain-setting resistors. The device is available in multiple package types to suit various applications.

Features

  • VSSOP, SOIC, PDIP, and WSON Packaging
  • No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits are Necessary
  • Thermal Shutdown Protection Circuitry
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PO at 1% THD+N with VDD = 5V, 1kHz
    • LM4864LD, 4Ω load 625 mW (typ)
    • LM4864LD, 8Ω load 725 mW (typ)
    • LM4864M & LM4864N, 8Ω load 675 mW (typ)
    • LM4864MM, 8Ω load 300 mW (typ)
    • LM4864, 16Ω load 550 mW (typ)
    • Shutdown current 0.7 µA (typ)

All trademarks are the property of their respective owners. Boomer is a trademark of Texas Instruments.

View more

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

 
Analog Supply (V) (Min)
Analog Supply (V) (Max)
Architecture
Speaker Channels (Max)
Audio Input Type
Output Power (W)
Load (Min) (ohms)
Iq (Typ) (mA)
Iq (Max) (mA)
THD + N @ 1 kHz (%)
PSRR (dB)
Iq per channel (Typ) (mA)
Pin/Package
Package Size: mm2:W x L (PKG)
Operating Temperature Range (C)
Control Interface
Shutdown Current (ISD) (uA)
Rating
LM4864
2.7   
5.5   
Class AB   
Mono   
Analog Input   
0.85   
4   
3.6   
6   
0.7   
50   
3.6   
8SOIC
8VSSOP   
8SOIC: 29 mm2: 6 x 4.9(SOIC)
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)   
-40 to 85   
Hardware   
0.7   
Catalog