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YDA137

YAMAHA CORPORATION
Part Number YDA137
Manufacturer YAMAHA CORPORATION
Description STEREO 5W DIGITAL AUDIO POWER AMPLIFIER
Published Dec 1, 2009
Detailed Description YDA137 D- 2 STEREO 5W DIGITAL AUDIO POWER AMPLIFIER ■Overview YDA137 (D-2) is a high efficient digital audio power ampli...
Datasheet PDF File YDA137 PDF File

YDA137
YDA137

Overview
YDA137 D- 2 STEREO 5W DIGITAL AUDIO POWER AMPLIFIER ■Overview YDA137 (D-2) is a high efficient digital audio power amplifier IC that operates on a single 5V power supply.
With YDA137 in BTL connection, an audio power amplifier with a maximum output of 5W (RL=2Ω)×2ch can be configured with one chip.
YDA137 converts an input analog data into a digital pulse by the digital modulation circuit in the IC and outputs a high current digital pulse from the output buffer circuit.
This digital pulse signal is converted into an audio signal by an external low-pass filter and is output to the speaker.
Low-distortion rate characteristics and high S/N ratio are realized as a digital amplifier among same class, by adopting Yamaha’s unique modulation system.
In addition, class AB headphone amplifier with output of 20mW (RL=16Ω)×2ch is embedded and switching between digital amplifier output and headphone amplifier output can be done by the control of terminal termination.
YDA137 has the over-current protection function for speaker terminals, the high-temperature protection function for IC, and the pop noise rejection function.
IC operation can be restricted by the two control signals of /SLEEP and /MUTE.
/SLEEP signal can stop all functions and decrease the consumption power to a minimum.
In addition, /MUTE signal can pull-down the output buffer (hereinafter, described as WL) and make the output mute.
■Features ・High Output Power 5.
0 W ＠ VDD=5.
0V, RL=2Ω, THD+N<10% 3.
7 W ＠ VDD=5.
0V, RL=3Ω, THD+N<10% 3.
0 W ＠ VDD=5.
0V, RL=4Ω, THD+N<10% www.
DataSheet4U.
com ・High Efficient Operation 75 % ＠ VDD=5.
0V, RL=2Ω, Po=5W 80 % ＠ VDD=5.
0V, RL=3Ω, Po=3W ・Low Distortion Rate (THD+N) 0.
03 % ＠ 1kHz, RL=2Ω, Po=2.
5W 0.
02 % ＠ 1kHz, RL=3Ω, Po=1.
5W ・High S/N Ratio 105dB ＠VDD=5.
0V, input sensitivity 1.
0Vrms, RL=2Ω, Po=5W 98dB ＠VDD=5.
0V, input sensitivity 150mVrms, RL=2Ω, Po=5W ・IC Low Consumption Current 25 mA ＠ VDD=5.
0V, no signal (no filter) 10 mA ＠ VDD=5.
0V, at mute 1 µA ＠ VDD=5.
0V, at sleep ・CS(Channel S...


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