TDA7293HS vs TDA7851F
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | STMicroelectronics | STMicroelectronics |
| Description | IC AMP AB MONO 100W 15MULTIWATT | IC AMP AB QUAD 75W 25FLEXIWATT |
| Package | Tube | Tape & Reel (TR) |
| Series | - | - |
| Type | Class AB | Class AB |
| Features | Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby | Mute, Short-Circuit and Thermal Protection, Standby |
| Voltage - Supply | ±12V ~ 50V | 8V ~ 18V |
| Operating Temperature | 0°C ~ 70°C (TA) | - |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | Multiwatt-15 (Horizontal, Bent and Staggered Leads) | 25-Flexiwatt (Formed Leads) |
| Supplier Device Package | 15-Multiwatt | 25-Flexiwatt (Vertical) |
| Output Type | 1-Channel (Mono) | 4-Channel (Quad) |
| Max Output Power x Channels @ Load | 100W x 1 @ 4Ohm | 75W x 4 @ 2Ohm |
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1. 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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2. 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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3. 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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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.
