1.25W 单声道、模拟输入 AB 类音频放大器
| Audio input type | Analog Input |
| Architecture | Class-AB |
| Speaker channels (Max) | Mono |
| Power stage supply (Max) (V) | 5.5 |
| Power stage supply (Min) (V) | 2.5 |
| Load (Min) (ohms) | 8 |
| Output power (W) | 1.25 |
| SNR (dB) | 104 |
| THD + N @ 1 kHz (%) | 0.06 |
| Iq (Typ) (mA) | 1.7 |
| Control interface | Hardware |
| Closed/open loop | Closed |
| Analog supply (Min) (V) | 2.5 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 90 |
| Operating temperature range (C) | -40 to 85 |
- 1.25 W Into 8 Ω From a 5-V Supply at
THD = 1% (Typical) - Low Supply Current: 1.7 mA Typical
- Shutdown Control < 10 μA
- Only Five External Components
- Improved PSRR (90 dB) and Wide Supply Voltage (2.5 V to 5.5 V) for Direct Battery Operation
- Fully Differential Design Reduces RF
Rectification - Improved CMRR Eliminates Two Input Coupling Capacitors
- C(BYPASS) Is Optional Due to Fully Differential Design and High PSRR
- Avaliable in a 2 mm x 2 mm MicroStar
Junior BGA Package (GQV, ZQV) - Available in 3 mm x 3 mm QFN Package (DRB)
- Available in an 8-Pin PowerPAD MSOP (DGN)
- APPLICATIONS
- Designed for Wireless or Cellular Handsets and PDAs
The TPA6203A1 is a 1.25-W mono fully differential amplifierdesigned to drive a speaker with at least 8-Ω impedance while consuming less than 37 mm2 (ZQV package option) total printed-circuit board (PCB) area in most applications. This device operates from 2.5 V to 5.5 V, drawing only 1.7 mA of quiescent supply current. The TPA6203A1 is available in the space-saving 2 mm x 2 mm MicroStar Junior BGA package, and the space saving 3 mm x 3 mm QFN (DRB) package.
Features like 85-dB PSRR from 90 Hz to 5 kHz, improved RF-rectification immunity, and small PCB area makes the TPA6203A1 ideal for wireless handsets. A fast start-up time of 4 μs with minimal pop makes the TPA6203A1 ideal for PDA applications.
