YDA135-VZ View Datasheet(PDF) - Yamaha Corporation

Part Name

Description

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YDA135-VZ

STEREO 5W-20W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER

Yamaha Corporation 

YDA135

D-20

STEREO 5W-20W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER

Outline

YDA135 is digital audio power amplifier controller IC that is output power of 20W/channel on a 12V power supply

operation.

This IC is combined with the general purpose Power MOSFET (hereafter called Power MOSFET) that are

connected through BTL can configure an audio power amplifier with output power of 5W or 20W.

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

the digital pulse signal for driving Power MOSFET. The Power MOSFET that is driven by this IC outputs large

current digital pulses. The digital pulse signal is converted to audio signal through an external low pass filter, and

sent to the speakers.

By using a general purpose Power MOSFET, very low cost digital amplifier system is configured. By adapting

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 equiralent class.

This IC has the overcurrent detection function that detects overcurrent state by voltage drop of external resistors

that detects the output current.

This IC has the high temperature detection function that detects high temperature by resistor value change of

external element that detects temperature.

The operation of this IC is limited by using two control signal, SLEEP or MUTE. SLEEP signal stops all functions

of this IC, and restrain to the power consumption at the minimum. MUTE signal brings Power MOSFET into

nonconductive state, and mute the output of the device.

This IC is configured by two power supply ; 5V for signal processing circuits, and 12V for Power MOSFET driving

circuits.

Features

・Highoutputpower

　　20W＠VDDP=12.0VRL=4ΩTHD+N<10%

・Highefficiencyoperation

　　80%＠VDDP=12.0VRL=4ΩPo=20W

　　85%＠VDDP=12.0VRL=8ΩPo=10W

・Lowdistortion(THD+N)

　　0.03%＠1kHzRL=4ΩPo=7W

・Highsignaltonoiseratio

　　100dB＠VDDP=12.0VInputsensitivity1.0VRL=4Ω

　　97dB＠VDDP=12.0VInputsensitivity150mVRL=4Ω

・Lowconsumptioncurrent(12V/5Vpowersupply)

WhenPowerMOSFET(FW332)isconnected.

　　30mA/7mA＠VDDP=12.0Vnosignal

　　0.1mA/7mA＠VDDP=12.0Vatmute

　　1μA/1μA＠VDDP=12.0Vatsleep

・CS(Channelseparation)

　　80dB＠1kHz

・Anygainsettingbyexternalresistors

・SleepfunctionbySLEEPterminal

・OutputmutefunctionbyMUTEterminal

・Overcurrentdetectionfunction

(Powersupplyshort-circuiting,Groundshort-

circuiting,Loadshort-circuiting)

・Hightemperaturedetectionfunction

・Popnoisesuppressionfunctionatturn-onand

turn-off

・48-pinplasticLQFP(YDA135-VZ)

YDA135CATALOG

CATALOG No.:LSI-4DA135A2

2003.3

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