具有 85mW 耳机放大器的 1W 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 |
| SNR (dB) | 93 |
| THD + N @ 1 kHz (%) | 0.33 |
| Iq (Typ) (mA) | 3.2 |
| Control interface | Hardware |
| Closed/open loop | Open |
| Analog supply (Min) (V) | 2.5 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 65 |
| Operating temperature range (C) | -40 to 85 |
- Ideal for Notebook Computers, PDAs, and Other Small Portable Audio Devices
- 1 W Into 8-
From 5-V Supply - 0.3 W Into 8- From 3-V Supply
- Stereo Head Phone Drive
- Mono (BTL) Signal Created by Summing Left and Right Signals Internally
- Wide Power Supply Compatibility
??? 2.5 V to 5.5 V - Low Supply Current
- 3.2 mA Typical at 5 V
- 2.7 mA Typical at 3 V
- Shutdown Control ...1 uA Typical
- Shutdown Pin Is TTL Compatible
- –40°C to 85°C Operating Temperature Range
- Space-Saving, Thermally-Enhanced MSOP Packaging
The TPA0253 is a 1-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 8- speaker.
The gain of the input stage is set by the user-selected input resistor and a 50-k/RI in BTL mode. The input terminals are high-impedance CMOS inputs, and can be used as summing nodes.
The TPA0253 is available in the 10-pin thermally-enhanced MSOP package (DGQ) and operates over an ambient temperature range of ?40°C to 85°C.
