YDA144-WZ

更新时间： 2024-01-22 13:00:05

品牌	Logo	应用领域
雅马哈 - YAMAHA		放大器功率放大器
页数	文件大小	规格书
26页	1170K
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YDA144-WZ 数据手册

YDA144

D-4N

STEREO 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER

■Overview

YDA144 (D-4N) is a digital audio power amplifier IC with maximum output of 2.1W (R_L=4Ω)×2ch.

YDA144 has a “Pure Pulse Direct Speaker Drive Circuit” which directly drives speakers while reducing distortion of

pulse output signal and reducing noise on the signal, and realizes the highest standard low distortion rate characteristics

and low noise characteristics among digital amplifier ICs for mobile use.

In addition, circuit design with fewer external parts can be made depend on the condition of use because corresponds to

filter less.

The YDA144 features Yamaha original non-clip output control function which detects output signal clip due to the over

level input signal and suppress the output signal clip automatically. Also the non-clip output control function can adapt

the output clip caused by power supply voltage down with battery. This is the difference from the traditional AGC (Auto

Gain Control) or ALC (Auto Level Control) circuit. Attack time and release time can be freely set by external resistances

or capacitances.

The independent power-down function for L channel and R channel minimizes consumption current at standby. As for

protection function, overcurrent protection function for speaker output terminal, overtemperatue protection function for

inside of the device, and low supply voltage malfunction preventing function are prepared.

■Features

・Maximum output

2.1 W×2ch (V_DDP=V_DDA=5.0V, R_L=4Ω, THD+N=10%)

0.75 W×2ch (V_DDP=V_DDA=3.6V, R_L=8Ω, THD+N=10%)

・Distortion Rate (THD+N)

0.03 % (V_DDP=V_DDA=3.6V, R_L=8Ω, Po=0.4W, 1kHz)

・Residual Noise

40µVrms (V_DDP=V_DDA=3.6V, Av=12dB)

・Efficiency

84 % (V_DDP=V_DDA=3.6V, R_L=8Ω, Po=600mW)

78 % (V_DDP=V_DDA=3.6V, R_L=8Ω, Po=100mW)

・S/N Ratio

95dB (V_DDP=V_DDA=3.6V, Av=12dB)

・Channel separation

95dB (V_DDP=V_DDA=3.6V, R_L=8Ω, Av=18dB, 1kHz)

・Over-current Protection function

・Thermal Protection function

・Low voltage Malfunction Prevention function

・2ch independent power-down control function

・Power-down High speed Recovery function

・Package

Lead-free 16-ball WLCSP (YDA144-WZ)

Lead-free 20-pin QFN (YDA144-QZ)

YDA144 CATALOG

CATALOG No.:LSI-4DA144A30

2006.11

12 3 4 5 6 7...26

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