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LM4923

Texas Instruments
Part Number LM4923
Manufacturer Texas Instruments
Description 1.1 Watt Fully Differential Audio Power Amplifier
Published May 19, 2023
Detailed Description LM4923, LM4923LQBD www.ti.com SNAS211E – JULY 2004 – REVISED MAY 2013 LM4923 1.1 Watt Fully Differential Audio Power...
Datasheet PDF File LM4923 PDF File

LM4923
LM4923

Overview
LM4923, LM4923LQBD www.
ti.
com SNAS211E – JULY 2004 – REVISED MAY 2013 LM4923 1.
1 Watt Fully Differential Audio Power Amplifier With Shutdown Select Check for Samples: LM4923, LM4923LQBD FEATURES 1 •2 Fully Differential Amplification • Available in Space-saving WQFN Package • Ultra Low Current Shutdown Mode • Can Drive Capacitive Loads up to 100pF • Improved Pop & Click Circuitry Eliminates Noises During Turn-on and Turn-off Transitions • 2.
4 - 5.
5V Operation • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required APPLICATIONS • Mobile Phones • PDAs • Portable Electronic Devices KEY SPECIFICATIONS • Improved PSRR at 217Hz 85dB(typ) • Power Output at 5.
0V @ 1% THD+N 1.
1W(typ) • Power Output at 3.
3V @ 1% THD+N 400mW(typ) • Shutdown Current 0.
1μA(typ) DESCRIPTION The LM4923 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications.
It is capable of delivering 1.
1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components.
The LM4923 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
The LM4923 features a low-power consumption shutdown mode.
To facilitate this, Shutdown may be enabled by logic low.
Additionally, the LM4923 features an internal thermal shutdown protection mechanism.
The LM4923 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.
Connection Diagrams VO- 8 IN- 1 GND 7 6 BYP IN+ 2 3 5 SD 4 ININ+ VDD VO+ VOGND BYP SD VDD VO+ Figure 1.
NGP Package, Top View See Package Number NGP0008A ...


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