LM4923LQ Datasheet PDF - National Semiconductor
| Part Number | LM4923LQ | |
| Description | 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select | |
| Manufacturers | National Semiconductor | |
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There is a preview and LM4923LQ download ( pdf file ) link at the bottom of this page. Total 12 Pages | ||
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July 2004
LM4923
1.1 Watt Fully Differential Audio Power Amplifier With
Shutdown Select
General Description
The LM4923 is a fully differential audio power amplifier
primarily designed for demanding applications in mobile
phones and other portable communication device applica-
tions. It is capable of delivering 1.1 watt of continuous aver-
age 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 appli-
cations where minimal power consumption is a primary re-
quirement.
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.
Key Specifications
j Improved PSRR at 217Hz
j Power Output at 5.0V @ 1% THD+N
j Power Output at 3.3V @ 1% THD+N
j Shutdown Current
85dB(typ)
1.1W(typ)
400mW(typ)
0.1µA(typ)
Features
n Fully differential amplification
n Available in space-saving LLP package
n Ultra low current shutdown mode
n Can drive capacitive loads up to 100pF
n Improved pop & click circuitry eliminates noises during
turn-on and turn-off transitions
n 2.4 - 5.5V operation
n No output coupling capacitors, snubber networks or
bootstrap capacitors required
Applications
n Mobile phones
n PDAs
n Portable electronic devices
Connection Diagrams
LQ Package
8 Pin LQ Marking
20071330
Top View
Order Number LM4923LQ
See NS Package Number LQB08A
20071302
X − Date Code
TT − Die Traceability
G − Boomer
B2 − LM4923LQ
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS200713
www.national.com
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Typical Performance Characteristics
THD+N vs Frequency
VDD = 2.6V, RL = 8Ω, PO = 150mW
THD+N vs Frequency
VDD = 2.6V, RL = 4Ω, PO = 150mW
20071306
THD+N vs Frequency
VDD = 5V, RL = 8Ω, PO = 400mW
20071305
THD+N vs Frequency
VDD = 3V, RL = 8Ω, PO = 275mW
20071309
THD+N vs Frequency
VDD = 3V, RL = 4Ω, PO = 225mW
THD+N vs Output Power
VDD = 2.6V, RL = 8Ω
20071308
20071307
5
20071311
www.national.com
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LM4923LQ electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LM4923LQ.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| LM4923LQ | The function is 1.1 Watt Fully Differential Audio Power Amplifier With Shutdown Select. National Semiconductor | |
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