YDA136 Datasheet, PDF (6/32 Pages) YAMAHA CORPORATION – D- 60 STEREO 60W-100W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER

YDA136
■Description of Block Functions
① Stores the digital audio signal into DAC data register through a DAC interface.
② Inputs into DAC through an over-sampling filter, and converts into an analog signal.
③ Performs a DC cut to DAC output data with the exterior capacitor of IC.
④ Performs a volume control and Differential signal conversion.
⑤ Performs a pulse width modulation
Negative feedbacks from the output of an external PowerMOSFET buffer.
⑥ Performs an Off-time delay control, and drives an external PowerMOSFET(Pch, Nch).
High current digital pulse signal is output from external PowerMOSFET (Pch, Nch)
The digital pulse signal is converted into audio signals by external LC filter and transmitted to speaker.
⑦ Stores the 7-bit volume data and control data into volume register and control register respectively through a MPU
interface.
⑧ Operation control circuit and protect circuit
⑨ Master clock generation circuit and carrier clock generation circuit
■Supply of Power
YDA136 needs to be supplied the following two kinds of power supplies, the object for Low-Side drivers (Analog
Circuit), and the object for High-Side drivers, in addition to a power stage power supply (VBB, VSS).
Be sure to use VDD power for Low-Side driver and VBS for High-Side driver.
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