LM48820中文资料具有固定 1.5V/V 增益的 95mW 立体声、模拟输入耳机放大器数据手册TI规格书

描述 Description

The LM48820 is a ground referenced, fixed-gain audio power amplifier capable of delivering 95mW of continuous average power into a 16Ω single-ended load, with less than 1% THD+N from a 3V power supply.

The LM48820 features a new circuit technology that utilizes a charge pump to generate a negative reference voltage. This allows the outputs to be biased about ground, thereby eliminating output-coupling capacitors typically used with normal single-ended loads.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal number of external components. The LM48820 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other portable applications.

The LM48820 features a low-power consumption shutdown mode selectable for each channel and a soft start function that reduces start-up current transients. Additionally, the LM48820 features an internal thermal shutdown protection mechanism.

The LM48820 contains advanced pop and click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM48820 has an internal fixed gain of 1.5V/V.

特性 Features

• Available in Space Saving 0.4mm Pitch DSBGA Package
• Ground Referenced Outputs
• Ultra Low Current Shutdown Mode
• No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors, or Gain-Setting Resistors Required
• Soft Start Feature Reduces Start up Transient Current
• Improved PSRR at 217Hz: 80dB (typ)
• Shutdown Current: 0.05μA (typ)
• Wide Operating Voltage Range: 1.6V to 4.5V