TPA6203A1NMBR

Overview

The TPA6203A1NMBR is a 1.25-W mono fully differential audio power amplifier designed for wireless handsets and PDAs. It operates from a single supply voltage ranging from 2.5 V to 5.5 V, delivering 1.25 W into an 8-Ω load at 5 V with 1% THD+N. The device features a typical quiescent supply current of 1.7 mA and shutdown current below 10 μA. It utilizes a MicroStar Junior BGA package (GQV/ZQV) or QFN/MSOP options, ensuring minimal PCB area consumption.

Feature Summary

• Fully differential architecture reduces RF rectification interference and eliminates the need for input coupling capacitors when driven by compatible sources.
• High power supply rejection ratio (PSRR) of 90 dB minimizes noise from battery fluctuations and digital switching transients.
• Integrated shutdown control allows for rapid start-up with minimal pop-and-click artifacts, suitable for portable applications.
• Optional bypass capacitor design simplifies external component count while maintaining stable mid-supply biasing.

Applications

• Wireless cellular handsets
• Personal Digital Assistants (PDAs)
• Portable multimedia players

Procurement Notes

Verify the specific package suffix (e.g., GQV, ZQV, DRB, DGN) against the required footprint, as the NMBR designation may indicate a specific tape-and-reel configuration or regional variant not explicitly detailed in the primary datasheet table. Confirm moisture sensitivity level and lead-free assembly qualifications if applicable to the manufacturing process.

Selection Notes

Select this amplifier for space-constrained designs requiring high efficiency and low distortion without external output blocking capacitors. Ensure the input source can be biased within the common-mode range of 0.5 V to VDD - 0.8 V to utilize the differential input advantage. Match feedback resistors closely to maintain optimal common-mode rejection ratio.

Part Context

The TPA6203A1 belongs to Texas Instruments' family of Class-AB audio amplifiers optimized for mobile devices. It shares architectural similarities with the TPA6204A1 and TPA6205A1 but offers a specific power-to-size ratio tailored for single-channel mono speaker driving in compact form factors like the 2x2 mm MicroStar Junior BGA.

Replacement Considerations

TPA6203A1DRBR: Same electrical specifications in an 8-pin SON package. TPA6203A1DGN: Same electrical specifications in an 8-pin MSOP PowerPAD package. Verify pinout compatibility and thermal dissipation requirements when substituting packages.

FAQ

Is the bypass capacitor mandatory for operation?

No, the C(BYPASS) capacitor is optional due to the fully differential design, though adding it improves PSRR and controls start-up rise time.

What is the minimum supply voltage for rated performance?

The device operates from 2.5 V to 5.5 V, but rated output power of 1.25 W requires a 5 V supply.