Features: Available in space-saving packages: LLP, micro SMD, and MSOP
Ultra low current shutdown mode
BTL output can drive capacitive loads
Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
2.0 - 5.5V operation
No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity-gain stable
External gain configuration capability
User selectable shutdown High or Low logic LevelApplicationMobile Phones
PDAs
Portable electronic devicesPinout
Specifications
| Power@ 8Ohms, 1% THD |
1 Watt |
| Power@ 8Ohms, 10% THD |
1.3 Watt |
| THD |
0.2 % |
| PSRR |
64 dB |
| Channels |
1 Channels |
| Supply Range |
+2.0 - +5.5 V |
| THD Conditions |
Po = 0.5Wrms, f=1kHz |
| PSRR Conditions |
Vripple = 0.2V sine p-p, Input terminated with 10ohms, f=1kHz |
| User Supply |
5 Volt |
| Shutdown Type |
High/Low Selectable |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
Supply Voltage (Note 11) ...............................................6.0V
Storage Temperature................................ −65°C to +150°C
Input Voltage .........................................−0.3V to VDD +0.3V
Power Dissipation (Notes 3, 13)................ Internally Limited
ESD Susceptibility (Note 4).......................................... 2000V
ESD Susceptibility (Note 5)............................................ 200V
Junction Temperature ..................................................150°C
Thermal Resistance
JA (micro SMD) (Note 12).................................... 180°C/W
JC (MSOP)............................................................. 56°C/W
JA (MSOP)........................................................... 190°C/W
JA (LLP)................................................. 63°C/W (Note 14)
JC (LLP) .................................................12°C/W (Note 14)
DescriptionThe LM4901 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8 BTL load and 1.6 watts of continuous avearge power to a 4 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 LM4901 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 LM4901 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown.
The LM4901 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.
The LM4901 is unity-gain stable and can be configured by external gain-setting resistors.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4901MM |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4901MMX |
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-1528: Application Note 1528 Using AC'97 Codecs in Non-PC Systems |
164 Kbytes |
16-Mar-07 |
Download |
AN-1528 (Chinese): Application Note 1528 Using AC'97 Codecs in Non-PC Systems
|
483 Kbytes |
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LM4901 Data Sheet
