Texas Instruments
AEC-Q100 4-channel 2.1 MHz analog-input Class-D audio amp, 27 W/4 Ω, HTSSOP-44
The TPA6304-Q1 is a four-channel analog-input Class-D audio amplifier for automotive use. Switching at 2.1 MHz keeps it out of the AM band and allows a compact solution. It delivers 27 W at 10% THD into 4 Ω from 14.4 V, drives 2 Ω loads, supports PBTL, and keeps operating down to 4.5 V during start/stop events. It includes I2C-controlled load diagnostics, 40 V load dump tolerance and AC impedance measurement. Typical uses are automotive head units and external amplifier modules.
Key Specifications
Verify against the original datasheet before quoting.
| Supply (PVDD) | 4.5 V to 18 V (14.4 V typ), 40 V load dump |
|---|---|
| Output power | 27 W at 10% THD into 4 Ω, 14.4 V; 2 Ω capable; PBTL |
| Channels / input | 4-channel single-ended analog input; gain 10/16/22/28 dB |
| Switching frequency | 2.1 MHz Class-D |
| Audio performance | THD+N < 0.006%; 42 µVRMS output noise; 80 dB PSRR |
| Temperature | AEC-Q100 Grade 1: -40 to 125 °C ambient |
Market Status
Availability is limited. Factory lead time is currently around 26 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
Does the TPA6304-Q1 keep working during engine start/stop?
Yes. The datasheet specifies full operation with PVDD down to 4.5 V for start/stop events, and the supply is rated for a 40 V load dump.
What load diagnostics are built in?
It detects open load, shorted load, output shorts to battery or ground and a connected tweeter, and can measure AC load impedance.
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