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LM4936 数据表(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM4936
功能描述  Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I2C)
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM4936 数据表(HTML) 1 Page - National Semiconductor (TI)

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LM4936
Stereo 2W Audio Power Amplifiers with Volume Control
and Selectable Control Interface (SPI or I
2C)
General Description
The LM4936 is a monolithic integrated circuit that provides
volume control, and stereo bridged audio power amplifiers
capable of producing 2W into 4
Ω (Note 1) with less than 1%
THD or 2.2W into 3
Ω (Note 2) with less than 1% THD.
Boomer® audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4936 incorporates a
SPI or I
2C Control Interface that runs the volume control,
stereo bridged audio power amplifiers and a selectable gain
or bass boost. All of the LM4936’s features (i.e. SD, Mode,
Mute, Gain Sel) make it optimally suited for multimedia
monitors, portable radios, desktop, and portable computer
applications.
The LM4936 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
Note 1: When properly mounted to the circuit board, LM4936MH will deliver
2W into 4
Ω. See Application Information section Exposed-DAP package
PCB Mounting Considerations for more information.
Note 2: An LM4936MH that has been properly mounted to the circuit board
and forced-air cooled will deliver 2.2W into 3
Ω.
Key Specifications
n
P
O at 1% THD+N
n
into 3
2.2W (typ)
n
into 4
2.0W (typ)
n
into 8
1.25W (typ)
n
Single-ended mode - THD+N at 90mW into 32
Ω 1%(typ)
n
Shutdown current
0.7µA (typ)
Features
n
Selectable SPI or I
2C Control Interface
n
System Beep Detect
n
Stereo switchable bridged/single-ended power amplifiers
n
Selectable internal/external gain and bass boost
n
“Click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
n
Headphone Sense
Applications
n
Portable and Desktop Computers
n
Multimedia Monitors
n
Portable Radios, PDAs, and Portable TVs
Connection Diagram
TSSOP Package
20117802
Top View
Order Number LM4936MH
See NS Package Number MXA28A for Exposed-DAP TSSOP
Boomer® is a registered trademark of NationalSemiconductor Corporation.
April 2005
© 2005 National Semiconductor Corporation
DS201178
www.national.com


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