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.