Stereo 2W Audio Power Amplifiers - Texas Instruments
Description
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
1
•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
• PO 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, lowpower 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...
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