The LM48860 is a ground referenced, fixed-gain audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω single-ended load with less than 1% THD+N from a 3V power supply. It features a new circuit technology that utilizes a charge pump to generate a negative reference voltage, eliminating the need for output-coupling capacitors typically used with normal single-ended loads. The amplifier is suitable for mobile phone and low voltage applications with minimal power consumption. It also includes a low-power consumption shutdown mode, internal thermal shutdown protection mechanism, and advanced pop & click circuitry for noise elimination during turn-on and turn-off transitions.
The LM48860 is a ground‑referenced, fixed‑gain audio power amplifier that provides up to 40 mW per channel into a 16 Ω load while maintaining less than 1 % THD+N from a 3 V supply. It uses a charge‑pump to generate a negative reference voltage, eliminating the need for output‑coupling capacitors and allowing operation with minimal external components. The device includes pop‑and‑click suppression, an internal thermal shutdown, and independent low‑power shutdown for each channel.
Typical applications include mobile phones, MP3 players, PDAs, portable electronic devices, and notebook PCs. Key specifications are a supply voltage range of 2.0 V–5.5 V, an internal fixed gain of 1.5 V/V, PSRR of 80 dB at 217 Hz, and a shutdown current of 0.1 µA per channel.
| Output Power per Channel | 40 mW (typ) |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V |
| Internal Fixed Gain | 1.5 V/V |
| Shutdown Current | 0.1 µA (typ) |
| Power Supply Rejection Ratio (PSRR) at 217 Hz | 80 dB (typ) |
The device operates from 2.0 V up to 5.5 V.
It has a fixed internal gain of 1.5 V/V.
No, the ground‑referenced design eliminates the need for output‑coupling capacitors.