7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier - LM4950

LM4950 (ACTIVE)

7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier

Description

The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. It is capable of delivering 3.1 watts per channel to a 4Ω single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8Ω load, with less than 10% THD+N from a 12VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4950 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size.

The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an internal thermal shutdown protection mechanism along with short circuit protection.

The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors.

Features

  • Pop & Click Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions
  • Low Current, Active-Low Shutdown Mode
  • Low Quiescent Current
  • Stereo 3.1W Output, RL = 4Ω
  • Mono 7.5W BTL Output, RL = 8Ω
  • Short Circuit Protection
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • Quiescent Power Supply Current 16mA (typ)
  •  POUT (SE)
    • VDD = 12V, RL = 4Ω, 1% THD+N: 3.1W (typ)
  •  POUT (BTL)
    • VDD = 12V, RL = 8Ω, 10% THD+N: 7.5W (typ)
  • Shutdown Current 40μA (typ)

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Parametrics Compare all products in Mid/High-Power Amplifier

 
Max. Power to Single-Ended Load
Max. Power to Bridge Tied Load
Min. Supported Single-Ended Load
Min. Supported Bridge Tied Load
Closed/Open Loop
Max Speaker Outputs (#)
Input Type
Control Type
Analog Supply Min [V]
Analog Supply Max [V]
Power Stage Supply Min (V)
Power Stage Supply Max (V)
Rating
Operating Temperature Range (C)
Approx. Price (US$)
Architecture
LM4950
6.5    
7.5    
4    
4    
Open    
2    
Analog    
Hardware    
9.6    
16    
9.6    
16    
Catalog    
-40 to 85    
1.19 | 1ku    
Class AB    

Related end equipment

  • Flat Panel Monitors
  • Flat Panel TVs
  • Computer Sound Cards

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