Datasheet > AS3561-BWLM

AS3561-BWLM

更新时间： 2025-09-15 18:59:31

品牌	Logo	应用领域
奥地利微 - AMS		/
页数	文件大小	规格书
18页	371K
描述
IC AMP CLASS H STER 30MW 16WLCSP

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AS3561-BWLM 数据手册

Data Sheet

AS3561

Class-H Stereo Headphone Amplifier

1 General Description

2 Key Features

ꢀClass-H amplifier with integrated DCDC buck converter

The AS3561 is a Class-H stereo headphone amplifier optimized for

usage within portable devices. The Class-H supply rail adaptation is

implemented by an integrated DCDC buck converter that takes its

input directly from the battery. The continuous adaption of supply

rails is done according to the input signal swing and load conditions.

This architecture implements significant power savings compared to

traditional Class-AB amplifiers.

- 2x30mW, 0.02% THD @16:

- >100dB SNR @1V_rms

ꢀCharge pump for true ground output without coupling capacitors

ꢀDirect battery connection with wide supply range: 2.5V to 5.5V

ꢀLow power consumption optimized for battery operation

An I2C control interface is implemented for a 32-step volume control.

- 1 mA quiescent current with both channels enabled

- <5 μA shutdown current

The integrated charge pump generates a symetric negative supply

for true ground output signal levels without the need of output

coupling capacitors.

ꢀFully Differential Inputs reduce system noise

- Also configurable as Single-Ended Inputs

A supervisory circuit is included for overtemperature and short-

circuit protection.

ꢀSGND pin for ground sensing and ground feedback minimizes

sensitivity to interference

Differential inputs together with output ground sensing guarantees

very low noise sensitivity.

ꢀI2C control interface

- volume control with 32 gain steps, -59 to +4dB, <-80dB mute

- Channel independent enable control

Current and Temperature Supervisor

ꢀPackage: 0.4 mm Pitch WCSP (1.615x1.615mm)

3 Applications

ꢀMobile Phones

ꢀPortable Navigation DevicesMedia Devices

ꢀMedia Devices

Figure 1. AS3561 Block Diagram

3.3ꢀH

2.2u

10u

2.2u

DCDC

Buck

Charge

Pump

2.2u

INRP

INRN

HPR

2.2u

INLP

INLN

HPL

SGND

SCL

SDA

Supervisor

I2C

(Current & Temp)

AGND

www.austriamicrosystems.com/AS3561

Revision 0.11 - preliminary

1 - 18

12 3 4 5 6 7...18

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