YDA142 Datasheet, PDF (9/18 Pages) YAMAHA CORPORATION – D- 3D DIGITAL INPUT STEREO 9.5W DIGITAL AUDIO POWER AMPLIFIER

YDA142
ç
Monaural Function
When MONO terminal is “H”, YDA142 enters Monaural Mode.
In this mode, L channel input signal is output.
The mode can output up to 19W power into a 4Ω load resistor by short-circuiting between OUTPL and OUTPR terminals
and between OUTML and OUTMR terminals.
In addition, LINEOUTL terminal outputs L channel input signals but LINEOUTR terminal gets undefined.
Switch between Monaural Mode and Stereo Mode during SLEEP Mode or a power shutdown state.
●Protection Function
YDA142 has the following protection functions: Over-current Protection function, Thermal Protection function, Clock Stop
Protection function, Under-voltage Malfunction Prevention function, and DC Input Detection function.
Over-current Protection Function
This is a function to make the Over-current Protection Mode (disables the output stage of a digital amplifier in conjunction
with “L” output to PROTN terminal) by detecting a short-circuiting (Ground short/Power supply short/Short between
terminals) in the output stage of a digital amplifier.
This mode can be cancelled by power supply shutdown or SLEEPN terminal “L” setting.
In addition, the mode can be automatically resumed after the over-current detection by connecting PROTN terminal to
SLEEPN terminal.
Thermal Protection Function
This is a function to make the Thermal Protection Mode (disables the output stage of a digital amplifier in conjunction with
“L” output to PROTN terminal) by detecting extraordinary high temperature on YDA142. This mode can be cancelled by
sufficient temperature decrease, power supply shutdown, or SLEEPN terminal “L” setting.
In addition, the mode can be automatically resumed after the high temperature detection by connecting PROTN terminal
to SLEEPN terminal.
Clock Stop Protection Function
This is a function to make the Clock Stop Protection Function (disables the output stage of a digital amplifier) when a
SCLK signal frequency of the digital interface becomes a frequency lower than Stop Detection Frequency (F_UFP).
The mode can be cancelled by returning the carrier clock frequency to the normal value.
Under-voltage Malfunction Prevention Function
This is a function to make the Under Voltage Protection Function (disables the output stage of a digital amplifier in
conjunction with setting “High-Z” state to PROTN terminal) when a voltage at 12V power supply terminal (PVDDREG)
becomes lower than the Under Voltage Detection Threshold Voltage (V_UVPL) or a voltage at 5V power supply terminal
(DVDD) becomes lower than the Under Voltage Detection Threshold Voltage (V_UVAL).
The built-in 5V regulator is also disabled when a voltage at 12V power supply terminal becomes lower than the Threshold
Voltage V_UVPL.
The mode can be cancelled when “L” is set to SLEEPN terminal or a voltage of each power supply terminal becomes
higher than the Threshold Voltage (V_UVPH, V_UVAH).
9