YDA136 Datasheet, PDF (23/32 Pages) YAMAHA CORPORATION – D- 60 STEREO 60W-100W DIGITAL AUDIO POWER AMPLIFIER CONTROLLER

YDA136
■Control Function
●Hard Mute Function
YDA136 serves as hard mute mode, when a MUTEN terminal is "L."
In hard mute mode, they are all PowerMOSFETs. It turns off (hard mute).
Hard mute will be canceled if a MUTEN terminal is set to "H."
Rewriting of all registers is possible for during a hard mute mode period.
●Protect Reset Function
YDA136 serves as protection reset mode, when a PRSTN terminal is "L."
A PROTN terminal is set to "H" in protection reset mode.
Hard mute is carried out simultaneously, the circuit which operates inside IC is minimized, and consumption current is
reduced.
After canceling protection reset mode, using a PRSTN terminal as "H", after starting standby time (T_WAIT), hard mute is
canceled and a start of operation is carried out.
Rewriting of all registers is possible for during a hard mute mode period.
Moreover, a register is by protection reset mode. is not carried out.
●Monophonic Function
YDA136 serves as monophonic mode, when a MONO terminal is “H.”
In monophonic mode, only Lch outputs an audio signal, and all the circuits related to Rch is stopped.
Moreover, it becomes stereo mode when a MONO terminal is “L.”
In monophonic mode, the over-current detection function by the OCPLR terminal and the PCPHR terminal does not
operate.
Please perform the change in monophonic mode and stereo mode at the time of interception of a power supply.
The change in the monophonic mode by the MONO terminal at the time of power supply impression and stereo mode is
forbidden.
■Typical Voltage
Since a VREFL terminal and a VREFR terminal output 1/2*V_DD2 voltage respectively, be sure to connect and stabilize a
capacitor.
■Initialization / Power-down
●System Initialization
All registers are initialized when V_DD2 voltage (VDD-VSS) becomes less than V_VD in low voltage detection modes.
The initial value of each register is “0.”
●Power-down
At the time of power interception, be sure to intercept a power after set it as a hard mute mode.
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