Features: Pseudo-differential amplification
Internal gain-setting resistors
Available in space-saving LLP package
Ultra low current shutdown mode
Can drive capacitive loads up to 500pF
Improved pop & click circuitry virtually eliminates noises during turn-on and turn-off transitions
2.2 - 5.5V operation
No output coupling capacitors, snubber networks,
bootstrap capacitors or gain-setting resistors required
Ultra low noiseApplicationMobile phones
PDAs
Portable electronics devicesPinout
Specifications
| Power@ 16Ohms, 1% THD |
0.25 Watt |
| Power@ 32Ohms, 1% THD |
0.12 Watt |
| THD |
0.1 % |
| PSRR |
65 dB |
| Channels |
1 Channels |
| THD Conditions |
Pout=25mW |
| PSRR Conditions |
Vripple=200mV |
| User Supply |
5 Volt |
| Shutdown Type |
Low |
| Supply Range |
+2.2 - +5.5 V |
| Exposed DAP |
Yes |
| Capless Headphone |
No |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
Supply Voltage.............................................................. 6.0V
Storage Temperature ...............................−65°C to +150°C
Input Voltage........................................ -0.3V to VDD + 0.3V
Power Dissipation (Note 3) .......................Internally Limited
ESD Susceptibility (Note 4) .........................................2000V
ESD Susceptibility (Note 5) ...........................................200V
Junction Temperature................................................. 150°C
Thermal Resistance
JC (LQ).................................................................. 57°C/W
JA (LQ)................................................................ 140°C/WDescriptionThe LM4915 is a pseudo-differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable audio device applications with mono headphones. It is capable of delivering 90 miliwatts of continuous average power to a 32 BTL load with less than 1% distortion (THD+N) from a 3VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4915 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 LM4915 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by driving the shutdown pin low. Additionally, the LM4915 features an internal thermal shutdown protection mechanism.
The LM4915 contains advanced pop & click circuitry which virtually eliminates noises which would otherwise occur during turn-on and turn-off transitions.
The LM4915 has an internally fixed gain of 6dB.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4915LQ |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| LM4915LQX |
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-1964: Application Note 1964 LM49151 Demonstration Board and Software Guide |
1605 Kbytes |
13-May-09 |
Download |
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LM4915 Data Sheet
