PAM8009DHR vs TPA6139A2PWR
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Diodes Incorporated | Texas Instruments |
| Description | IC AMP D/AB STEREO 3W 24SOP | IC AMP CLSS AB STER 25MW 14TSSOP |
| Package | Tape & Reel (TR) | Bulk |
| Series | - | DirectPath™ |
| Type | Class D, Class AB | Class AB |
| Features | Depop, Mute, Thermal Protection | Depop, Mute, Short-Circuit and Thermal Protection |
| Voltage - Supply | 2.8V ~ 5.5V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 24-SOIC (0.295\", 7.50mm Width) | 14-TSSOP (0.173\", 4.40mm Width) |
| Supplier Device Package | 24-SOIC | 14-TSSOP |
| Output Type | 2-Channel (Stereo) with Stereo Headphones | Headphones, 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 3W x 2 @ 4Ohm | 25mW x 2 @ 32Ohm |
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1. What types of audio amplifiers are available?
Common types of audio amplifiers include:
Class A amplifiers: have the highest sound quality, but are less efficient.
Class B amplifiers: More efficient, but may produce crossover distortion.
Class AB amplifiers: between Class A and Class B with good balance.
Class D amplifier: highest efficiency, suitable for portable devices, but slightly lower sound quality. -
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.
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3. What is a Class D audio amplifier and what are its advantages?
Class D audio amplifiers work through Pulse Width Modulation (PWM) technology and have extremely high efficiency (typically up to 90% or higher), making them suitable for use in portable audio equipment or high-efficiency sound systems. It generates less heat because it reduces energy consumption.
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4. 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.
