Features: `Pop & click circuitry eliminates noise during turn-on and turn-off transitions
` Low current, active-low shutdown mode
` Low quiescent current
`Stereo 3.1W output, RL = 4
` Mono 7.5W BTL output, RL = 8
` Short circuit protection
` Unity-gain stable
`External gain configuration capability
Application` Flat Panel Monitors
` Flat panel TV's
` Computer Sound CardsSpecifications
| Power@ 4Ohms, 1% THD |
3.1 Watt |
| Power@ 8Ohms, 10% THD |
3.1 Watt |
| THD |
0.14 % |
| PSRR |
70 dB |
| Channels |
2 Channels |
| Supply Range |
+9.6 - +16 |
| THD Conditions |
Po=2.5Wrms,Av=10,f-1kHz,RL=4 ohm SE |
| PSRR Conditions |
Vripple=200mVpp,f=1kHz,RL=8 ohm BTL |
| User Supply |
12 Volt |
| Shut down |
Yes |
| Shutdown Type |
Low |
| Mono/Stereo |
Stereo |
| Temperature Min |
-40 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
Supply Voltage (pin 6, referenced to GND, pins 4 and 5) ......18.0V
Storage Temperature .................−65°C to +150°C
Input Voltage pins 3 and 7 ..............−0.3V to VDD + 0.3V
pins 1, 2, 8, and 9 ......................−0.3V to 9.5V
Power Dissipation (Note 3)................ Internally limited
ESD Susceptibility (Note 4)...................... 2000V
ESD Susceptibility (Note 5) .......................200V
Junction Temperature ........................150°C
Thermal Resistance
JC (TS) ...............................4°C/W
JA (TS) (Note 3).......................... 20°C/W
JC (TA)............................... 4°C/W
JA (TA) (Note 3) ..........................20°C/WDescriptionThe LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. It is capable of delivering 3.1 watts per channel to a 4 single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8 load, with less than 10% THD+N from a 12VDC power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4950 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size.
The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an internal thermal shutdown protection mechanism along with short circuit protection.
The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.
The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors.
More Application Notes
| Title |
Size in Kbytes |
Date |
|
| AN-1441: Application Note 1441 LM4962 Evaluation Board |
840 Kbytes |
20-Apr-06 |
Download |
| AN-1440: Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note |
760 Kbytes |
20-Apr-06 |
Download |
AN-1440 (Chinese): Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note
|
548 Kbytes |
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LM4950 Data Sheet
