UNISONIC TECHNOLOGIES CO., LTD

M4670

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 9

Copyright © 2012 Unisonic Technologies Co., Ltd

QW-R502-442.b

FITERLESS HIGH EFFICIENCY

3W SWITCHING AUDIO

AMPLIFIER

DESCRIPTION

The M4670 is a fully integrated single-supply, high-efficiency

Class D switching audio amplifier, and it can provide 3W of output

power. Containing adjustable output gain chip with micro-power

shutdown mode, the M4670 has innovative modulation schemes

that eliminate the output filter wave devices and thus reduces the

requirement of external components helping to streamline the circuit

design and reduce board area.

By using delta-sigma modulation technique which handles

incoming analog signal, the M4670 can reduce the output noise and

total harmonic distortion.

Operating on a single 5V supply, the M4670 can be a

continuous average output of 2.3W of power to driver the 4Ω

speaker, and the total harmonic distortion and noise (THD+N) are

less than 1%. High power conversion efficiency of the M4670 can

drive a larger load speaker that is respectively comparable to the

typical Class AB amplifier. Its can be used with a 3.6V, 600mW

power supply to driver an 8Ω speaker, while the efficiency is as high

as 88%.

The M4670 has a high output power characteristics that makes

it ideal for ultra-high-power walkie-talkies, mobile phones,

hands-free intercom systems and applications.

FEATURES

* Externally Configurable Gain

* No Output Filter Required for Inductive Loads

* Very Fast Turn on Time: 1.05ms (Typical)

* ‘Click and Pop’ Suppression Circuitry

* Micro-Power Shutdown Mode

* Short Circuit Protection

DFN-8(3x3)

1

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

M4670L-K08-3030-R

M4670G-K08-3030-R

DFN-8(3×3)

Tape Reel