The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.25 watts of continuous average power to an 8Ω BTL load and 2 watts of continuous average power (LD and MH only) to a 4Ω BTL load with less than 1% distortion (THD+N+N) from a.
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 LM4990 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions. The LM4990 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Improved PSRR at 217Hz & 1KHz j Power Output at 5.0V, 1% THD+N, 4Ω (LD and MH.
The LM4990 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | LM4991 |
National Semiconductor |
3W Audio Power Amplifier | |
2 | LM4991 |
Texas Instruments |
3W Audio Power Amplifier | |
3 | LM4992 |
National Semiconductor |
420mW Stereo Cell Phone Audio Amplifier | |
4 | LM4992 |
Texas Instruments |
420mW Stereo Cell Phone Audio Amplifier | |
5 | LM4995 |
Texas Instruments |
1.3W Audio Power Amplifier | |
6 | LM4995 |
National Semiconductor |
1.3W Audio Power Amplifier | |
7 | LM4900 |
National Semiconductor |
265mW at 3.3V Supply Audio Power Amplifier | |
8 | LM4900 |
Texas Instruments |
Audio Power Amplifier | |
9 | LM4901 |
National Semiconductor |
1.6 Watt Audio Power Amplifier | |
10 | LM4901 |
Texas Instruments |
1.6 Watt Audio Power Amplifier | |
11 | LM4902 |
National Semiconductor |
265mW at 3.3V Supply Audio Power Amplifier | |
12 | LM4902 |
Texas Instruments |
265mW at 3.3V Supply Audio Power Amplifier |