TPA6304QDDVRQ1 four-channel DDV automotive amplifier
TPA6304QDDVRQ1 is an automotive four-channel, analog-input Class-D speaker amplifier in a 44-pin DDV thermally enhanced HTSSOP. It targets car infotainment and distributed audio amplification, with four independent single-ended input channels and I2C-controlled diagnostics. Unlike the TAS5827 digital-input amplifier, it does not accept the same I2S/TDM audio source directly. The DDV thermal pad and speaker wiring must be part of the sourcing check: a nominal four-channel automotive power amplifier with a different exposed-pad orientation or diagnostics interface is not necessarily a serviceable replacement.
Output power, distortion and 2.1 MHz audio switching
TI specifies 2.1 MHz Class-D operation and AEC-Q100 grade 1 ambient qualifications, with start/stop behavior down to 4.5 V. Its quoted 27 W at 14.4 V into 4 Ω explicitly uses 10% THD; presenting that as low-distortion rated program power would mislead an amplifier designer. Distinct measurements at 1 kHz characterize lower THD+N, output noise and efficiency; their load and voltage conditions must accompany them. Four selectable gain options, current limiting, open/short load diagnostics, thermal foldback and a 40 V load-dump feature help integration with a vehicle head unit. The real output power envelope is determined by speaker impedance, battery supply during cold crank and the thermal pad’s heat-removal path.
Speaker diagnostics, gain options and load-dump limits
Compare output topology, analog input common-mode, diagnostics register map, I2C timing, gain choices, EMC switching modes, short-to-battery/ground behavior and DDV land pattern before qualifying an alternate. A chip may exceed the headline power but violate AM-radio interference constraints or lack fast load fault detection. Quote TPA6304QDDVRQ1 with actual speaker load, battery/transient limits, THD target, enclosure heatsinking and software initialization expectations.
TPA6304QDDVRQ1 automotive audio measurements
| Selection parameter | TI-verified value | Engineering condition |
|---|---|---|
| Power | 27 W, 10% THD into 4 Ω at 14.4 V | 27 W into 4 Ω at 14.4 V is measured at 10% THD; not low-distortion continuous audio. |
| Startstop | Start/stop operation down to 4.5 V | Start-stop operation down to 4.5 V; speaker power derates as supply falls. |
| Switching | Class-D at 2.1 MHz, no AM interference | 2.1 MHz PWM helps manage AM-band interference with TI-recommended EMI design. |
| Load dump | 40 V Load dump | 40 V load-dump rating is a protection condition; check test waveform and wiring. |
| Inputs | 4 Channel single-ended analog input | Four analog single-ended inputs; do not assume I2S/TDM digital audio input. |
| Gain | 10 dB, 16 dB, 22 dB or 28 dB Gain option | 10/16/22/28 dB are selectable gain settings; confirm input headroom. |
| Thdn | THD+N < 0.006% | Quoted THD+N is condition-bound by output power, supply, load and frequency. |
| Catalog package | HTSSOP(DDV)-44 | Confirm the HTSSOP(DDV)-44 exact SKU package and TI pin drawing before replacing the part. |
DDV-44 layout and head-unit RFQ
For TPA6304QDDVRQ1, specify quantity, speaker impedances, actual battery/voltage transients, acceptable THD target, analog signal levels, diagnostics interface, RF emissions requirements and DDV-44 thermal pad. Final availability, pricing and lead time require supplier RFQ confirmation.
