The TFA9873 is a high-efficiency boosted class-D audio amplifier solution associated with speaker protection and boost algorithm. It can deliver up to 4.5 W average output power into a 6 Ω speaker, at a supply voltage of 4.0 V. The internal adaptive DC-to-DC converter raises the supply voltage, providing ample headroom for major improvements in sound quality.
High output power
4.5 W (average) into 6 Ω at 4.0 V supply voltage (THD = 1 %)
3.5 W (average) into 8 Ω at 4.0 V supply voltage (THD = 1 %)
Supports handset (16 Ω or 32 Ω) and hands-free (4 Ω to 8 Ω) speaker configurations
High efficiency, low power dissipation, and low-noise speaker driver
Adaptive DC-to-DC converter increases the supply voltage smoothly while switching between fixed boost and adaptive boost modes. It thus, prevents large battery supply spikes and limits the quiescent power consumption
Wide supply voltage range (fully operational from 2.7 V to 5.5 V)
Very low-noise output voltage, 9 μV
Low battery current consumption, 120 mA (Po = 380 mW, average music power)
I2C-bus control interface (400 kHz)
Speaker current and voltage monitoring (through the TDM-bus) for acoustic echo cancellation (AEC) at the host
16 kHz / 32 kHz / 44.1 kHz / 48 kHz sample frequencies supported
Ultrasonic support via TDM running at 96 kHz
Programmable interrupt control via a dedicated interrupt pin
Low RF susceptibility
Thermal foldback and excessive temperature protection
| Name | Rights Description | Version | Date |
|---|---|---|---|
| TFA9873 SDS | For Public | Rev.1.2 | 2020-12-10 |
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