Exact device and ordering identity
TAS3251DKQR is a digital-input Class-D audio power amplifier supplied in TI’s 56-pin HSSOP (DKQ) PowerPAD package. Its digital audio front end provides supported input formats and processing functions, while its output power must be interpreted using the specified load impedance, bridge configuration and distortion threshold. A stereo-power figure at 10% THD+N does not represent the clean-power capability at 1% THD+N. The exact DKQR package and ordering suffix should be retained in purchasing requests.
Operating and control considerations
The TI datasheet lists I2S/TDM and related digital input formats with multiple sample rates, plus a DSP and I2C configuration interface. Output levels differ between BTL stereo and PBTL mono connections: the cited 175W stereo into 4ohm rating is at 10% THD+N, while 140W stereo into 4ohm is at 1% THD+N. The 12–36V operating supply and speaker/load limits must be checked for the selected bridge mode. Adequate cooling, EMC filtering and power-supply decoupling remain essential.
Package, sourcing and engineering trade-offs
Substitution review needs the same pinout and thermal footprint, audio input protocol, register/control sequence, output bridge wiring and speaker impedance. A package-compatible amplifier with an analog input or different DSP may not be a firmware-compatible replacement. Include the intended stereo/mono topology and distortion requirement in RFQs, rather than comparing only the highest headline wattage.
Manufacturer-verified selection specifications
| Selection parameter | TI-verified value | Engineering condition |
|---|---|---|
| Input formats | I2S, TDM, left-justified, right-justified | Refer to exact manufacturer operating conditions |
| Sample rates | 32kHz, 44.1kHz, 48kHz, 96kHz | Refer to exact manufacturer operating conditions |
| Stereo 10pct thd | 175W Stereo into 4Ω in BTL configuration | Refer to exact manufacturer operating conditions |
| Mono 10pct thd | 350W Mono into 2Ω in PBTL configuration | Refer to exact manufacturer operating conditions |
| Stereo 1pct thd | 140W Stereo into 4Ω in BTL configuration | Refer to exact manufacturer operating conditions |
| Control | I2C Software mode control | Refer to exact manufacturer operating conditions |
| Supply | Wide 12V to 36V supply voltage operation | Check one- and two-supply operation |
| Catalog package | Distributor listing: SSOP-56-300mil; TI official: HSSOP-56 (DKQ), 18.42 × 10.35 mm package dimensions. Use TI DKQ mechanical and PowerPAD land pattern. | Match exact TI mechanical drawing before footprint or replacement approval |
Procurement and datasheet
Request a quotation for TAS3251DKQR using the complete orderable number, target quantity and package requirement. Stock, pricing and delivery timing require a direct RFQ confirmation; no on-page availability or price is promised. Source-listed alternative candidates, where present, are for engineering evaluation and do not establish drop-in compatibility.
