|
Features
MSOP, LLP, and SOP packaging
No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
Thermal shutdown protection circuitry
Unity-gain stable
External gain configuration capability
Latest generation "click and pop" suppression circuitry
Description The LM4900 is a bridged audio power amplifier capable of delivering 265mW of continuous average power into an 8Ω load with
1% THD+N from a 3.3V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power from a low supply voltage while requiring
a minimal amount of external components. Since the LM4900 does not require output coupling capacitors, bootstrap capacitors
or snubber networks, it is optimally suited for low-power portable applications.
The LM4900 features an externally controlled, low power consumption shutdown mode, and thermal shutdown protection.
The closed loop response of the unity-gain stable LM4900 can be configured by external gain-setting resistors.
Key Specification
| ■ THD+N at 1kHz for 265mW continuous
average output power into 8Ω,
VDD = 3.3V
|
1.0% (max)
|
| ■ THD+N at 1kHz for 675mW continuous
average output power into 8Ω,
VDD = 5V
|
1.0% (max)
|
| ■ Shutdown current
|
0.1µA (typ)
|
Applications
Cellular phones
PDA's
Any portable audio application
|
Also Recommended
| LM4923▲ | Can Drive Capacitive Loads, Improved Pop & Click Circuitry & No Output Coupling Or Bootstrap Capacit |
| LM4905▲ | Can Drive Capacitive Loads, Improved Pop & Click Circuitry & No Output Coupling Or Bootstrap Capacit |
|
|
