The LM48410 is a single supply, high efficiency, 2.3W/channel, filterless switching audio amplifier. It eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design. The device operates from a single 5V supply and delivers 2.3W/channel of continuous output power to a 4Ω load with less than 10% THD+N. It offers two logic selectable modulation schemes, fixed frequency mode, and an EMI suppressing spread spectrum mode. The LM48410 features high efficiency compared with conventional Class AB amplifiers. It includes National's 3D audio enhancement that improves stereo sound quality by affecting channel specialization and widening the perceived soundstage.
The LM48410 is a single‑supply, high‑efficiency 2.3 W per channel Class D audio power amplifier designed for mobile phones, PDAs and laptops. It eliminates the need for an external output filter by using a low‑noise PWM architecture and offers selectable spread‑spectrum modulation to reduce RF emissions.
The document provides key specifications, absolute maximum ratings, pin descriptions, typical application circuits, performance graphs, and physical dimensions for the 4 mm × 4 mm LLP package. It also includes notes on shutdown current, quiescent current and compliance information.
| Output Power (Vpp = 5 V) | 2.3 W (typ) |
|---|---|
| Supply Voltage Range | 2.4 V to 5.5 V |
| Shutdown Current | 0.03 µA (typ) |
The LM48410 can operate from 2.4 V up to 5.5 V.
It can deliver 2.3 W per channel at Vpp = 5 V into a 4 Ω load.
The typical shutdown current is 0.03 µA.
No, the device is filterless and does not need an external output filter.