1FEATURES

23• 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, R L = 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)

• P OUT (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)

APPLICATIONS

• Flat Panel Monitors

• Flat Panel TVs

• Computer Sound Cards

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.