LM48555TL/NOPB vs LM4928TL/NOPB
| Part Number |
|
|
| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLASS AB MONO 12USMD | IC AMP CLASS AB STER 2.2W 16USMD |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | Boomer® | Boomer® |
| Type | Class AB | Class AB |
| Features | Depop, Differential Inputs, Shutdown | Depop, Differential Inputs, Shutdown, Thermal Protection |
| Voltage - Supply | 2.7V ~ 9V | 2.4V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 12-WFBGA | 16-WFBGA, DSBGA |
| Supplier Device Package | 12-uSMD (1.46x1.97) | 16-DSBGA |
| Output Type | 1-Channel (Mono) | 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | - | 2.2W x 2 @ 4Ohm |
-
1. What is a power amplifier and how is it different from an audio amplifier?
A power amplifier is a type of audio amplifier designed to drive high-power loads such as speakers. It is capable of amplifying audio signals to a sufficient power output to drive speakers to produce greater volume.
-
2. How to choose a suitable audio amplifier?
When choosing an audio amplifier, factors such as output power, total harmonic distortion (THD), signal-to-noise ratio (SNR), efficiency, impedance matching (speaker impedance), and power consumption should be taken into consideration to ensure that it is well-matched with the speakers and audio source equipment.
-
3. What is the signal-to-noise ratio (SNR) of an audio amplifier?
Signal-to-noise ratio (SNR) is a measure of the ratio of the audio signal to the background noise, with higher values indicating less noise in the audio signal. A high SNR usually means clearer sound output.
-
4. Does the audio amplifier need to match the impedance of the speakers?
Yes, the output impedance of the audio amplifier should match the impedance of the speaker. Typically speakers have an impedance of 4Ω, 8Ω or 16Ω. Matching the impedance ensures that the amplifier delivers maximum power and the best sound quality from the speaker.
