Specifications
| Power@ 4Ohms, 1% THD |
2.21 Watt |
| Power@ 8Ohms, 1% THD |
1.19 Watt |
| Power@ 4Ohms, 10% THD |
2.5 Watt |
| Power@ 8Ohms, 10% THD |
1.7 Watt |
| THD |
0.04 % |
| PSRR |
65 dB |
| SNR |
93 dB |
| Channels |
1 Channels |
| THD Conditions |
3.6v 0.1Wrms 1Lhz |
| PSRR Conditions |
3.6v 1khz Vr=200mVpp |
| SNR Conditions |
5V 1Wrms |
| User Supply |
5 Volt |
| Shut down |
Yes |
| Mono/Stereo |
Mono |
| Shutdown Type |
Low |
| Supply Range |
+2.4 - +5.5 V |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
DescriptionThe LM4671 is a single supply, high efficiency 2.5W switching audio amplifier. A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design.
The LM4671 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.1W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V.
The LM4671 has high efficiency with speaker loads compared to a typical Class AB amplifier. With a 3V supply driving an 8Ω speaker, the IC's efficiency for a 100mW power level is 80%, reaching 88% at 400mW output power.
The LM4671 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND).
The gain of the LM4671 is externally configurable which allows independent gain control from multiple sources by summing the signals.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4671ITL |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4671ITLX |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1614: Application Note 1614 LM48510 Speaker Application Note |
214 Kbytes |
14-Aug-07 |
Download |
AN-1614 (Chinese): Application Note 1614 LM48510 Speaker Application Note
|
295 Kbytes |
|
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| AN-1497: Application Note 1497 Filterless Class D Amplifiers |
524 Kbytes |
24-May-06 |
Download |
AN-1497 (Chinese): Application Note 1497 Filterless Class D Amplifiers
|
350 Kbytes |
|
640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram"> |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM4671 Data Sheet
