LM4936 Datasheet, PDF (1/37 Pages) National Semiconductor (TI) – Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I2C)

LM4936
www.ti.com
SNAS269A – APRIL 2005 – REVISED APRIL 2013
LM4936 Boomer™ Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers with
Volume Control and Selectable Control Interface (SPI or I²C)
Check for Samples: LM4936
FEATURES
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•23 Selectable SPI or I²C Control Interface
• System Beep Detect
• Stereo Switchable Bridged/Single-Ended
Power Amplifiers
• Selectable Internal/External Gain and Bass
Boost
• “Click and Pop” Suppression Circuitry
• Thermal Shutdown Protection Circuitry
• Headphone Sense
APPLICATIONS
• Portable and Desktop Computers
• Multimedia Monitors
• Portable Radios, PDAs, and Portable TVs
KEY SPECIFICATIONS
• P_O at 1% THD+N
– into 3Ω, 2.2W (Typ)
– into 4Ω, 2.0W (Typ)
– into 8Ω, 1.25W (Typ)
• Single-ended mode - THD+N at 90mW into
32Ω, 1% (Typ)
• Shutdown current, 0.7µA (Typ)
DESCRIPTION
The LM4936 is a monolithic integrated circuit that
provides volume control, and stereo bridged audio
power amplifiers capable of producing 2W into 4Ω ⁽¹⁾
with less than 1% THD or 2.2W into 3Ω ⁽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 I²C 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.
(1) When properly mounted to the circuit board, LM4936MH will
deliver 2W into 4Ω. See Application Information section
HTSSOP PACKAGE PCB MOUNTING CONSIDERATIONS
for more information.
(2) An LM4936MH that has been properly mounted to the circuit
board and forced-air cooled will deliver 2.2W into 3Ω.
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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.
Boomer is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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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 © 2005–2013, Texas Instruments Incorporated