The SPWLM386D is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addittion of an external resistor and capacitor between pin 1 and pin 8 will increase the gain to any value up from 20 to 200.
The SPWLM386D is a low‑voltage audio power amplifier designed for consumer applications. It features an internally set gain of 20, a wide supply range of 4 V to 12 V, and a quiescent power drain of only 24 mW, making it suitable for battery‑powered devices. Gain can be adjusted from 20 to 200 via pins 1 and 8, and the device includes ground‑referenced inputs and self‑biasing output.
The datasheet lists absolute maximum ratings, electrical characteristics, and typical performance graphs such as gain versus frequency, distortion versus output power, and supply‑rejection ratio. Application hints cover gain control, bass boost, and input biasing, while typical application circuits illustrate use as line drivers, intercom amplifiers, and portable audio devices.
| Supply Voltage Range | 4 V – 12 V |
|---|---|
| Voltage Gain | 20 – 200 |
| Input Resistance | 50 kΩ |
| Quiescent Power Drain | 24 mW at 6 V |
The gain can be set from 20 to 200 by adjusting pins 1 and 8.
The quiescent power drain is only 24 mW.
It operates from 4 V up to 12 V.