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LM4951

更新时间： 2024-11-25 12:09:47
品牌 Logo 应用领域
德州仪器 - TI 音频放大器
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22页 1426K
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LM4951 Wide Voltage Range 1.8 Watt Audio Amplifier

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LM4951  
www.ti.com  
SNAS244N –AUGUST 2004–REVISED MAY 2013  
LM4951  
Wide Voltage Range 1.8 Watt Audio Amplifier  
Check for Samples: LM4951  
1
FEATURES  
DESCRIPTION  
The LM4951 is an audio power amplifier primarily  
designed for demanding applications in Portable  
Handheld devices. It is capable of delivering 1.8W  
mono BTL to an 8Ω load, continuous average power,  
with less than 1% distortion (THD+N) from a 7.5VDC  
power supply.  
2
•
Click and Pop Circuitry Eliminates Noise  
during Turn-On and Turn-Off Transitions  
•
•
•
•
•
Low Current, Active-Low Shutdown Mode  
Low Quiescent Current  
Thermal Shutdown Protection  
Unity-Gain Stable  
Boomer audio power amplifiers were designed  
specifically to provide high quality output power with a  
minimal amount of external components. The  
LM4951 does not require bootstrap capacitors, or  
snubber circuits.  
External Gain Configuration Capability  
APPLICATIONS  
•
•
•
Portable Handheld Devices up to 9V  
The LM4951 features a low-power consumption  
active-low shutdown mode. Additionally, the LM4951  
features an internal thermal shutdown protection  
mechanism.  
Cell Phone  
PDA  
KEY SPECIFICATIONS  
The LM4951 contains advanced click and pop  
circuitry that eliminates noises which would otherwise  
occur during turn-on and turn-off transitions.  
•
•
Wide Voltage Range: 2.7V to 9 V  
Quiescent Power Supply Current (VDD  
7.5V): 2.5mA (typ)  
=
The LM4951 is unity-gain stable and can be  
configured by external gain-setting resistors.  
•
•
•
Power Output BTL at 7.5V, 1% THD: 1.8 W (typ)  
Shutdown Current: 0.01µA (typ)  
Fast Turn on Time: 25ms (typ)  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004–2013, Texas Instruments Incorporated  
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