S1M0085 Samsung Semiconductor, Inc., S1M0085 Datasheet

S1M0085

Manufacturer Part Number

S1M0085

Description

Output Cap-less Audio Subsystem With Class-d Speaker Amplifier

Manufacturer

Samsung Semiconductor, Inc.

Datasheet

1.S1M0085.pdf (1 pages)

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This document contains specification and information

under development. Samsung Electronics reserves the right to change specification

o r

Overview

The S1M0085X is a high efficient Class-D audio

power amplifier which can deliver 700mW of

power maximally into 8Ω speaker load at 3.3V

power supply.( @THD+N = 1%)

The variable switching frequency technique is

used to achieve good EMI property. ( spread

spectrum modulation) S1M0085X integrates

stereo Class-AB amplifier that can deliver 40mW

maximally into the 32 Ω headphone.

The S1M0085X also integrates input and output

selection switches internally, it can deliver various

audio signals efficiently to the speaker. ( ex.

Audio1,2 and Voice )

Adopting output capacitor-less configuration,

the application circuit can be more simple and

cost-competitive.

The S1M0085X features a 32-step digital volume

control and eight different output modes which are

programmed through I

or SPI signal.

The competitive design in a 4x4 [mm] ELP

package contributes to the saving of PCB size,

and the Class-D amplifier makes the system to be

efficient by increasing battery life time.

S1M0085X

Output Cap-less Audio subsystem

with Class-D Speaker Amplifier

S1M0085X

i n f o r m a t i o n

Functional Block Diagram

w i t h o u t

a n y

on a product developed or

p r i o r

n o t i c e .

Application

Features Summary

Mobile Handheld Phones

Portable Applications

- 2.5W into 4 Ω @ 5V

- 1.3 W into 8 Ω @ 5 V

- 700 mW into 8 Ω @ 3.3 V

- 91 % Efficiency , @ 3.6V, 0.7W into 8 Ω

- 86 % Efficiency , @ 3.6V, 1.2W into 4 Ω

- Variable PWM frequency (Spread Spectrum)

- PSRR > 85dB

- THD + N < 0.01 %, @ 1 KHz

- 4mm X 4mm 24 ELP package with 0.5mm pitch

- Load short, Power short

: PMP, Navigator, PDA, Note PC etc.

High Efficiency Class-D audio amp

Low EMI structure

High PSRR stereo Headphone amplifier

Power Supply Range : 2.7 V to 5.5 V

Low power consumption

Low shut down current

Audio selection switches included

V of -54~18dB

Cap-less output configuration

High Quality sound

Start-up procedure for preventing Pop-Up Noise

Space saving package

Internal short protection circuit

High Power Speaker output

Product Technical Brief

Rev 0.1, Oct 2007

S1M0085X

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