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科芯微电子 KX4990 Audio Power Amplifier Datasheet
The KX4990 is a dual‑output audio power amplifier designed for mobile phones and portable communication devices. It operates from 2.2 V to 5.5 V and can deliver up to 2 W into a 4 Ω BTL load at 5 V without the need for external coupling capacitors.
The chip features a high PSRR, low THD+N (<0.1 % across 1‑20 kHz), sleep‑mode power reduction, and a gain‑bandwidth product of 2.5 MHz. It is available in several small‑area packages (MSOP, SOP, LLP) and includes noise‑suppression technology for clean power‑on and power‑off transitions. This manual is written in Chinese.
Covers: Chip Function Description · Main Features · Application Areas · Chip Structure · Package and Pinout
Latest 科芯微电子 manuals
科芯微电子 KX4990 Audio Power Amplifier Datasheet
Datasheet 2 pages · 1.3 MB · ZHThe KX4990 audio power amplifier from 科芯微电子 offers up to 2 W output at 5 V with low distortion and a compact MSOP/LLP package.
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Datasheet
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in 科芯微电子 manuals
What is the maximum output power of the KX4990 at 5 V?
It can deliver up to 2 W into a 4 Ω BTL load when powered at 5 V.
Does the KX4990 require external coupling capacitors on its output?
No, the chip’s output does not need external coupling or bootstrap capacitors.