1FEATURES

23• Click and Pop Circuitry Eliminates Noise

During Turn-On and Turn-Off Transitions

• Low Current, Active-Low Shutdown Mode

• Low Quiescent Current

• Stereo 6W Output, RL = 4Ω

• Short Circuit Protection

• Unity-Gain Stable

• External Gain Configuration Capability

APPLICATIONS

• Flat Panel Monitors

• Flat Panel TVs

• Computer Sound Cards

KEY SPECIFICATIONS

• Quiscent Power Supply Current: 40mA (max)

(SE)

• P OUT V DD = 14.4V, RL = 4Ω, 10% THD+N: 6 W (typ)

• Shutdown Current: 40μA (typ)

DESCRIPTION

The LM4940 is a dual audio power amplifier primarily

designed for demanding applications in flat panel

monitors and TVs. It is capable of delivering 6 watts

per channel to a 4Ω load with less than 10% THD+N

while operating on a 14.4VDC power supply.

Boomer™ audio power amplifiers were designed

specifically to provide high quality output power with a

minimal amount of external components. The

LM4940 does not require bootstrap capacitors or

snubber circuits. Therefore, it is ideally suited for

display applications requiring high power and minimal

size.

The LM4940 features a low-power consumption

active-low shutdown mode. Additionally, the LM4940

features an internal thermal shutdown protection

mechanism along with short circuit protection.

The LM4940 contains advanced pop and click

circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4940 is a unity-gain stable and can be

configured by external gain-setting resistors.