TPA2028D1YZFR vs BD28620MUV-E2
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Rohm Semiconductor |
| Description | IC AMP CLASS D MONO 3W 9DSBGA | IC AMP D STEREO 20W VQFN024V4040 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | SmartGain™ | - |
| Type | Class D | Class D |
| Features | AGC, Differential Inputs, DRC, I²C, Short-Circuit and Thermal Protection, Shutdown, Volume Control | Depop, Short-Circuit Protection |
| Voltage - Supply | 2.5V ~ 5.5V | 8.5V ~ 24V |
| Operating Temperature | -40°C ~ 85°C (TA) | -25°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 9-UFBGA, DSBGA | 24-VFQFN Exposed Pad |
| Supplier Device Package | 9-DSBGA | VQFN020V4040 |
| Output Type | 1-Channel (Mono) | 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 3W x 1 @ 4Ohm | 20W x 2 @ 8Ohm |
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1. 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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2. 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.
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3. How can I improve the thermal performance of my audio amplifier?
Audio amplifiers generate heat when they operate, especially Class A and Class AB amplifiers. Ways to improve heat dissipation include using a larger heat sink, adding a fan, or using a more efficient Class D amplifier. A good thermal design will improve the performance and life of the amplifier.
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4. What should the frequency response range of an audio amplifier be?
The frequency response range of a good quality audio amplifier is usually between 20Hz and 20kHz, which is the typical frequency range that the human ear can hear. A wider frequency response ensures that the audio amplifier can accurately reproduce both low and high frequency details.
