*1: less than 8V supply available only for 8Ω or larger load

1μF1μF220μF

5V to 18V*1

PVDDPL PVSSL PVDDML

1μF1μF

OCPOTP

UVLODCDETCKDET

Rch.

Lch

Rch

Class-D

DC CutFilter

fs32kHz

44.1kHz48kHz

DynamicElementMatching

X4 FSOver Sampling

10Hz

MuteControl

Quick Mute

DigitalControl

DigitalAudio I/F

Protection

Regulator REFA

REFA

REFA

OUTPL

OUTML

PROTN

OUTPR

OUTMR

1μF

BTL

4Ω～

Lch.

BTL

4Ω～

47kΩ

3.3V

3.4V

ControlI/F

DEM DAC

YDA176(D-507DL)

OutputSCLK

LRCLK

MCK

MUTEN

SLEEPN

CKMOD

MONO

SDATA

TEST

PLIMIT2

PLIMIT1

GAIN

SoC

Output MuteControl

Shut-downControl

Stereo/MonoSelect

Carrier FrequencyControl

Gain SettingPower Limit

Setting

PowerLimiter

Multi steps

VolumeSelector

Multi steps

Class-D

PVDDPRAVSSDVSS PVSSR PVDDMR

APPLICATION DIAGRAMAPPLICATION DIAGRAM

DIGITAL INPUT STEREO 15W DIGITAL AUDIO POWER AMPLIFIERDIGITAL INPUT STEREO 15W DIGITAL AUDIO POWER AMPLIFIER

Simple, yet VersatileSimple, yet Versatile

Applications

PACKAGEPACKAGE

BOTTOM VIEW5.00mm

0.50mm

5.00

mm

We did everything to reduce the part count. Just hook up the loudspeakers, and you get a high-fidelity, high-power amplifier. This small-package device has a variety of functions such as an output power limiter that is configurable with 63 levels, gain adjustments that can be specified as a distortion level for a given power limiter level, and monaural mode that allows channel selection. Best fitted for any application with most added values.

We did everything to reduce the part count. Just hook up the loudspeakers, and you get a high-fidelity, high-power amplifier. This small-package device has a variety of functions such as an output power limiter that is configurable with 63 levels, gain adjustments that can be specified as a distortion level for a given power limiter level, and monaural mode that allows channel selection. Best fitted for any application with most added values.

LCD flat TVs

PC monitors

Stereo components

Home theatre systems

Desktop PCs

Key Specifications and FeaturesMonaural source can be selected fromthe channels on digital audio data.Protection circuitry for any-pin shortsUnrivaled audio performance in its class・THD+N=0.05％ , Noise Level=50μVrms

Comprehensive protection circuitryOvercurrent protect, overtemperature protect,undervoltage lockout, DC-output protect,stopped-clock protect

Instantaneous Maximum Output Power・15Wx2-ch (15V supply, 8Ω, THD+N=10％)・25Wx1-ch (15V supply, 4Ω, THD+N=10％, Mono)

Digital audio interfaceI2S:24bit, fs=32kHz,44.1kHz,48kHzThree levels of fixed gain or five levels adjustedfor the power-limit-level and distortion-level63 power limit levels(TBD) configurablewith pin strapping

PBDA176A-001-01-e

15V 8Ω15W

MAX

18V5V to

VDD

OTP OCPUVLO DCDET CKDET

PROTECTION

0.05%

THD+ NSNR INPUT

2CH2CHl2S

OUTPUT

105dB

Power Limit

63steps

3.50mm

3.50

mm

QFN32 (YDA176-QZ)

Semiconductor Div. 203 Matsunoki-jima, Iwata, Shizuoka 438-0192 Japan

Customer ServiceHead Quarter TEL：0539-62-4918 FAX：0539-62-5054Tokyo Office TEL：03-5488-5431 FAX：03-5488-5088Osaka Office TEL：06-6465-0325 FAX：06-6465-0391

The content is subject to change without notice.Unauthorized use of this document is prohibited.These introductory informations cannot be used for designs.Check with us for technical ones.Brand and product names used are trademarks of their respective holders.

•••

•http://www.yamaha.co.jp/product/lsi/

Created in May 2012 Document Code：PBDA176A-001-01-e

Supply Voltage 5V to 18V(less than 8V supply available only for 8Ω or larger load)

15Wx2-ch (VDDP =15V, RL =8Ω,THD+N=10%)

25Wx1-ch (VDDP =15V, RL =4Ω,THD+N=10%, Mono)

10Wx2-ch (VDDP =12V, RL =8Ω,THD+N=10%)

With Power Limit

Output beyond speaker's rated power Sets a limit on peak-to-peak voltage

No Power Limit

YDA181-TZYDA181-TZYDA181-TZYDA181-TZYDA181-TZYDA181-TZHotHot CoolCool

InstantaneousMaximum

Power

90dB (VDDP =12V, RL =8Ω,1kHz)CS

105dB (VDDP =12V, RL =8Ω)SNR

DIGITAL INPUT STEREO 15WDIGITAL AUDIO POWER AMPLIFIER

Substantially Reduced System FootprintYDA176 integrates functions previously performed by system components as circuitry, saving the PCB real estate.

Top-Notch Power Efficiency Power Limiter Maintains Sound QualityLimiting output peak-to-peak voltage protects connected speakers and prevents overheating of the device. Aliasing and other digital artifacts are reduced with digital processing. Pin strapping selects one of 63 power limit levels.

※The count is for the simplest configuration, and maybe different for particular applications.

Over 90% power efficiency achieved with the use of low-on-resistance power MOSFETs. So cool to run that continuous 15W output is possible without requiring a heat sink.※VDDP = 15 V, RL = 8Ω, Ta = 70°C, four-layer PCB

Thorough Protection Against Short CircuitsShort-circuiting of any two pins causes no fire or smoke.

Fail-safeOperation

Low HeatGeneration

Typical PCB layout

Typical PCB layout

Competitor’s component count: 47 YDA176 component count: 9

Amplifier

Capacitor

LC Filter BypassCapacitor

Resistor1608 size1005 size

Beads(2 in 1)

YDA1765mm

5mm

Beads(2 in 1)

・Supply noise coupling minimized with feedback design : Just two capacitors, 10 μF and 1μF, achieve minimal decoupling.・Better slew-rate control : Eliminates the need for LC output filters; just needs ferrite beads for typical applications.・Complementary MOSFET output stage : No need for bootstrap capacitors as in NMOS-only stages.・All these functions in one small package : Just 5mm x 5mm.

220μF

220μF