YDA131 CATALOG

CATALOG No.:LSI-4DA131A40

2004.12

YDA131

D-1

STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER

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Outline

The YDA131 is the high efficient digital audio power amplifier IC that operates on a single 5V power supply.

This IC is capable of providing output power of 2.5W/channel, which is at the highest level as a device on a single 5V

power supply. By adopting Yamaha's proprietary modulation system, the device provides low distortion and high signal

to noise ratio at the highest level among digital amplifiers in the equivalent class.

This IC accepts analog signal, converts it into digital pulse by the digital modulation circuitry and outputs the signal from

the large current capacity buffers. The digital pulse signal that is outputted from the output buffer is converted into audio

signal through an external low pass filter, and sent to the speakers.

This IC has the overcurrent detection function that detects short-circuiting of speaker terminal end and the high

temperature detection function that detects abnormal high temperature.

With the overcurrent detection function, this IC generates a warning signal when the current that flows in the output

buffers of left and right channels exceeds a fixed value. With the high temperature detection function, this IC generates a

warning signal when the junction temperature becomes abnormal.

Furthermore, this IC builds in function that mute an audio output and shut off all functions of the IC. By this function,

power consumption is restrained at the minimum.

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Features

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High output power

2.5 W @ VDD=5.0V, 4Ω (THD+N<10%)

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High efficiency operation

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Low distortion(THD+N)

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High signal to noise ratio

97dB

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Low consumption current

14.0 mA @ VDD=5.0V, no signal(no filter)

7.0 mA

@ VDD=5.0V, at mute

1 µA

@ VDD=5.0V, at sleep

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Channel separation

80dB @ 1kHz

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Any gain setting by external resistor

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Any setting of starting time by VREF capacitor

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Sleep function by SLEEP terminal

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Output mute function by MUTE terminal

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Over current detection function of speaker terminal end (Ground short-circuiting, Load short-circuiting)

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High temperature detection function

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Pop noise suppression function at turn-on and turn-off

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Analog input/BTL(Bridge-Tied Load)output

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24-pin plastic SSOP

Pin lead plating with Pd free (YDA13１-EZ)