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Features
Fixed 6dB BTL voltage gain
Available in space-saving packages micro SMD, MSOP and SOIC
Ultra low current shutdown mode
Can drive capacitive loads up to 500 pF
Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
2.0 - 5.5V operation
No output coupling capacitors, snubber networks or bootstrap capacitors required
External gain configuration still possible
Description The LM4820-6 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable
communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less
than 1% distortion (THD+N) at 6dB of BTL gain from a 5VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external
components. The LM4820-6 does not require input and gain resistors, output coupling capacitors or bootstrap capacitors, and
therefore is ideally suited for mobile phone and other low voltage applications where minimal parts count and low power
consumption is a primary requirement.
The LM4820-6 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low.
Additionally, the LM4820-6 features an internal thermal shutdown protection mechanism.
The LM4820-6 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and
turn-off transitions.
Key Specification
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Improved PSRR at 217Hz
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62dB
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Power Output at 5.0V & 1% THD
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1.0W(typ.)
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Power Output at 3.3V & 1% THD
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400mW(typ.)
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Shutdown Current
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0.1µA(typ.)
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Applications
Mobile Phones
PDAs
Portable electronic devices
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