Описание
The TPA2005D1 is a 1.4-W high-efficiency filter-free class-D audio power amplifier in a QFN or MSOP package that requires only three external components. Features like 84% efficiency, –71-dB PSRR at 217 Hz, improved RF-rectification immunity, and 15-mm2 total PCB area make the TPA2005D1 ideal for cellular handsets. A fast start-up time of 9 ms with minimal pop makes the TPA2005D1 ideal for PDA applications. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the TPA2005D1. The device allows independent gain control by summing the signals from each function, while minimizing noise to only 48 µVRMS.
- Efficiency With an 😯 Speaker:
- 84% at 400 mW
- 79% at 100 mW
- 2.8-mA Quiescent Current
- 0.5-µA Shutdown Current
- Optimized PWM Output Stage Eliminates LC Output Filter
- Internally Generated 250-kHz Switching Frequency Eliminates
Capacitor and Resistor - Improved PSRR (–71 dB at 217 Hz) and Wide Supply Voltage
(2.5 V to 5.5 V) Eliminates Need for a Voltage Regulator - Fully Differential Design Reduces RF Rectification and
Eliminates Bypass Capacitor - Improved CMRR Eliminates Two Input Coupling Capacitors
- 3 mm × 3 mm QFN package (DRB)
- 3 mm × 5 mm MSOP PowerPAD™ Package (DGN)
