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LM4954 High Voltage 3 Watt Audio Power Amplifier
June 2005
LM4954 High Voltage 3 Watt Audio Power...
www.DataSheet4U.com
LM4954 High
Voltage 3 Watt Audio Power Amplifier
June 2005
LM4954 High
Voltage 3 Watt Audio Power Amplifier
General Description
The LM4954 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 2.4 Watts of continuous average power to an 8Ω BTL load with less than 1% THD+N from a 7VDC power supply. Boomer audio power
amplifiers are designed specifically to provide high quality output power with a minimal number of external components. The LM4954 does not require output coupling
capacitors or bootstrap
capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary requirements. The LM4954 features a low-power consumption global shutdown mode which is achieved by driving the shutdown pin with logic low. Additionally, the LM4954 features an internal thermal shutdown protection mechanism. The LM4954 contains advanced pop & click circuitry which eliminates noises that would otherwise occur during turn-on and turn-off transitions. The LM4954 is unity-gain stable and can be configured by external gain-setting resistors.
Key Specifications
j Wide Power Supply
Voltage Range
j Output Power: VDD = 7V, 1% THD+N j Quiescent power supply current j PSRR: VDD = 5V and 3V at 217Hz j Shutdown power supply current
2.7 ≤ VDD ≤ 9V 2.4W (typ) 3mA (typ) 80dB (typ) 0.01µA (typ)
Feature...