Features: ·No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
·Small Outline (SO) packaging
·Compatible with PC power supplies
·Thermal shutdown protection circuitry
·Unity-gain stable
·External Gain Configuration CapabilityApplication·Personal computers
·Portable consumer products
·Cellular phones
·Self-powered speakers
·Toys and gamesPinout
Specifications
| Power@ 4Ohms, 1% THD |
1.55 Watt |
| Power@ 8Ohms, 1% THD |
1.15 Watt |
| Power@ 4Ohms, 10% THD |
1.9 Watt |
| Power@ 8Ohms, 10% THD |
1.5 Watt |
| THD |
0.72 % |
| PSRR |
65 dB |
| SNR |
98 dB |
| Channels |
1 Channels |
| Supply Range |
+2.0 - +5.5 V |
| THD Conditions |
Po=1W @ Vs=5V, R=8 ohms |
| SNR Conditions |
Pout=1W |
| User Supply |
5 Volt |
| Shutdown Type |
High |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
DescriptionThe LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8 load with 1% THD+N using a 5V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.
The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.
The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM4861 MDA |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4861M |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LM4861MX |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
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.
LM4861 Data Sheet
