Texas Instruments LM4951A Evaluation Board LM4951ASDBD/NOPB LM4951ASDBD/NOPB 数据表
产品代码
LM4951ASDBD/NOPB
SNAS453C – AUGUST 2008 – REVISED APRIL 2013
LM4951A
Wide Voltage Range 1.8 Watt Audio Amplifier
With Short Circuit Protection
Check for Samples:
1
FEATURES
DESCRIPTION
The LM4951A is an audio power amplifier designed
23
•
Pop & Click Circuitry Eliminates Noise During
for applications with supply voltages ranging from
Turn-On and Turn-Off Transitions
2.7V up to 9V. The LM4951A is capable of delivering
•
Wide Supply Voltage Range: 2.7V to 9V
1.8W continuous average power with less than 1%
•
Low Current, Active-Low Shutdown Mode
THD+N into a bridge connected 8
Ω
load when
operating from a 7.5VDC power supply.
•
Low Quiescent Current
Boomer™ audio power amplifiers were designed
•
Thermal Shutdown Protection
specifically to provide high quality output power with a
•
Short Circuit Protection
minimal
amount
of
external
components.
The
•
Unity-Gain Stable
LM4951A does not require bootstrap capacitors, or
•
External Gain Configuration Capability
snubber circuits.
The LM4951A features a low-power consumption
APPLICATIONS
active-low
shutdown
mode.
Additionally,
the
LM4951A features an internal thermal shutdown
•
Portable Devices
protection mechanism and short circuit protection.
•
Cell Phones
The LM4951A contains advanced pop & click circuitry
•
Laptop Computers
that eliminates noises which would otherwise occur
•
Computer Speaker Systems
during turn-on and turn-off transitions.
•
MP3 Player Speakers
The LM4951A is unity-gain stable and can be
configured by external gain-setting resistors.
configured by external gain-setting resistors.
KEY SPECIFICATIONS
•
Wide Voltage Range 2.7V to 9V
•
Quiescent Power Supply Current (V
DD
= 7.5V)
2.5mA (typ)
•
Power Output BTL at 7.5V, 1% THD
1.8 W (typ)
1.8 W (typ)
•
Shutdown Current 0.01µA (typ)
•
Fast Turn on Time 25ms (typ)
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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.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
Boomer is a trademark of Texas Instruments.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.