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LM4923 Datasheet(PDF) 1 Page - Texas Instruments |
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LM4923 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 23 page 8 7 3 4 2 1 5 6 VO- GND VDD VO+ SD IN- IN+ BYP IN- IN+ VDD VO+ GND VO- BYP SD LM4923, LM4923LQBD www.ti.com SNAS211D – JULY 2004 – REVISED FEBRUARY 2009 LM4923 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select Check for Samples: LM4923, LM4923LQBD 1 FEATURES DESCRIPTION 2 • Fully Differential Amplification The LM4923 is a fully differential audio power • Available in Space-saving WQFN Package amplifier primarily designed for demanding • Ultra Low Current Shutdown Mode applications in mobile phones and other portable communication device applications. It is capable of • Can Drive Capacitive Loads up to 100pF delivering 1.1 watt of continuous average power to an • Improved Pop & Click Circuitry Eliminates 8 Ω BTL load with less than 1% distortion (THD+N) Noises During Turn-on and Turn-off from a 5VDC power supply. Transitions Boomer audio power amplifiers were designed • 2.4 - 5.5V Operation specifically to provide high quality output power with a • No Output Coupling Capacitors, Snubber minimal amount of external components. The Networks or Bootstrap Capacitors Required LM4923 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited APPLICATIONS for mobile phone and other low voltage applications where minimal power consumption is a primary • Mobile Phones requirement. • PDAs The LM4923 features a low-power consumption • Portable Electronic Devices shutdown mode. To facilitate this, Shutdown may be enabled by logic low. Additionally, the LM4923 KEY SPECIFICATIONS features an internal thermal shutdown protection mechanism. • Improved PSRR at 217Hz 85dB(typ) • Power Output at 5.0V @ 1% THD+N 1.1W(typ) The LM4923 contains advanced pop & click circuitry which eliminates noises which would otherwise occur • Power Output at 3.3V @ 1% THD+N during turn-on and turn-off transitions. 400mW(typ) • Shutdown Current 0.1 μA(typ) Connection Diagram Figure 1. NGP Package, Top View Figure 2. 8 Pin VSSOP Package, Top View See Package Number NGP0008A See Package Number DGK0008A 1 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2009, 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. |
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