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參數(shù)資料
| 型號(hào)： | LDA08B |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 265mW at 3.3V Supply Audio Power Amplifier with Shutdown Mode |
| 中文描述： | 在3.3V電源音頻功率放大器265mW的關(guān)斷模式 |
| 文件頁(yè)數(shù)： | 1/19頁(yè) |
| 文件大?。?/td> | 772K |
| 代理商： | LDA08B |
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LM4900
265mW at 3.3V Supply Audio Power Amplifier with
Shutdown Mode
General Description
The LM4900 is a bridged audio power amplifier capable of
delivering 265mW of continuous average power into an 8
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 volt-
age while requiring a minimal amount of external compo-
nents. 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 protec-
tion.
The closed loop response of the unity-gain stable LM4900
can be configured by external gain-setting resistors.
Key Specifications
j
THD+N at 1kHz for 265mW continuous
average output power into 8
,
V
DD
= 3.3V
j
THD+N at 1kHz for 675mW continuous
average output power into 8
,
V
DD
= 5V
j
Shutdown current
1.0% (max)
1.0% (max)
0.1μA (typ)
Features
n
MSOP, LLP, and SOP packaging
n
No output coupling capacitors, bootstrap capacitors, or
snubber circuits are necessary
n
Thermal shutdown protection circuitry
n
Unity-gain stable
n
External gain configuration capability
n
Latest generation ’click and pop’ suppression circuitry
Applications
n
Cellular phones
n
PDA’s
n
Any portable audio application
Typical Application
Boomer
is a registered trademark of National Semiconductor Corporation.
DS200064-1
FIGURE 1. Typical Audio Amplifier Application Circuit
September 2001
L
2001 National Semiconductor Corporation
DS200064
www.national.com
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