具有低电平有效关断模式的 105mW 立体声模拟输入耳机放大器
| Output power (W) | 0.105 |
| Analog supply (Min) (V) | 2 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 70 |
| Rating | Catalog |
| Operating temperature range (C) | -40 to 85 |
| Headphone channels | Stereo |
| Volume control | No |
| Shutdown current (ISD) (uA) | 0.4 |
| Architecture | Class-AB |
| Iq per channel (Typ) (mA) | 0.7 |
- Active-Low Shutdown Mode
- "Click and Pop" Reduction Circuitry
- Low Shutdown Current
- WSON, MSOP, and SOIC Surface Mount Packaging
- No Bootstrap Capacitors Required
- Unity-Gain Stable
Key Specifications
- THD+N at 1kHz at 105mW Continuous Average Power into 16? 0.1% (typ)
- THD+N at 1kHz at 70mW Continuous Average Power into 32? 0.1% (typ)
- Shutdown Current 0.4μA (typ)
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The LM4809 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16? load with 0.1% (THD+N) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.
The unity-gain stable LM4809 can be configured by external gain-setting resistors.
The LM4809 features an externally controlled, active-low, micropower consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.
