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PDF ( 数据手册 , 数据表 ) YDA148

零件编号 YDA148
描述 STEREO 5W-15W DIGITAL AUDIO POWER AMPLIFIER
制造商 Yamaha
LOGO Yamaha LOGO 


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YDA148 数据手册, 描述, 功能
YDA148
D-510
STEREO 5W-15W DIGITAL AUDIO POWER AMPLIFIER
Overview
YDA148 (D-510) is a high-efficiency digital audio power amplifier IC with the maximum output of 15W × 2ch.
YDA148 has a “Pure Pulse Direct Speaker Drive Circuit” that directly drives speakers while reducing distortion of
pulse output signal and reducing noise on the signal, which realizes the highest standard low distortion rate
characteristics and low noise characteristics among digital amplifier ICs in the same class.
In addition, supporting filterless design allows circuit design with fewer external parts to be realized depending on use
conditions.
YDA148 features Power Limit Function, Non-clip Function, and DRC (Dynamic Range Control) Function that were
developed by Yamaha original digital amplifier technology.
YDA148 has overcurrent protection function for speaker output terminals, high temperature protection function, and
lowsupply voltage malfunction prevention function.
Features
Operating supply voltage range
PVDD: 8.0V to 16.5V
Maximum momentary output
15 W×2ch (VDDP=15V, RL=8, THD+N=10%)
Maximum continuous output
15 W*1×2ch (VDDP=15V, RL=8, THD+N=10%, Ta=70°C)
Distortion Rate (THD+N)
0.01 % (VDDP=12V, RL=8, Po=0.1W, 1kHz)
Residual Noise
48µVrms (VDDP=12V, GAIN[1:0]=L,L, NCDRC[1:0]=L,L)
Efficiency
91 % (VDDP=12V, RL=8)
S/N Ratio
105 dB (VDDP=12V, GAIN[1:0]=L,L, NCDRC[1:0]=L,L)
Channel separation
-80 dB (VDDP=12V, GAIN[1:0]=L,L, NCDRC[1:0]=L,L)
PSRR
60dB (VDDP=12V,Vripple=100mV, 1kHz, GAIN[1:0]=L,L, NCDRC[1:0]=L,L)
Non-clip function/DRC function (switchable)
Power limit function
Clock External Synchronization Function
Master/Slave Synchronization Function using clock outputs
Over-current Protection Function, High Temperature Protection Function,
Low Voltage Malfunction Prevention Function, and DC Detection Function
Sleep Function using SLEEPN terminal and Output Mute Function using MUTEN terminal
Stereo/Monaural Switching Function
Spread Clock Function
Pop Noise Reduction Function
Package
Lead-free 32-pin Plastic QFN (Exposed stage)
Note) *1: A value based on Yamaha's board implementation conditions (See Note *2 of page 25)
YDA148 CATALOG
CATALOG No.:LSI-4DA148A31
2007.9
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YDA148 pdf, 数据表
YDA148
Non-clip/DRC Function
This is the function to change the gain by detecting an input level to the PWM amplifier and to raise an average output
level while suppressing clipping.
A mode is determined by the combination of NCDRC[1:0] terminals, as shown below.
NCDRC1
L
L
H
H
NCDRC0
L
H
L
H
Mode
Non-clip & DRC mode OFF
Non-clip mode
DRC1 mode
DRC2 mode
In Non-clip mode, the gain increases by 12dB. The gain is automatically adjusted so that an output peak voltage becomes
a power limit value. The maximum attenuation is -12dB. Attack Time is 0 second. The release time from -12dB to 0dB is
7.7 s (typ.).
In DRC1 mode, the gain increases by 12dB. Dynamic Range Compression (a half of gain in dB) is performed within an
output range of -12dB (-24dB for input range) from the power limit value. Attack Time is 0 s. The release time from
-12dB to 0dB is 3.9 s (typ.).
In DRC2 mode, the gain increases by 12dB. As with DRC1, similar compression is performed, but power-limit operation
is not performed. PLIMIT terminal can be used to set a DRC operating point. Therefore, the setting of a gain curve is
possible regardless of the maximum output power, and this allows for DRC operation from a low output power.
NCDRC [1:0] terminal should be switched under either of the following conditions.
Before PVDD power-on (lower than the PVDD start-up threshold voltage (VHUVLH))
SLEEPN=L
Pop noise may occur when switching it under an operating condition other than the above.
8
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YDA148 equivalent, schematic
YDA148
PROTN terminal Pull-Up Connection 2 (A pull-up to 3.3V)
* If automatic return setting is given by connecting PROTN terminal to SLEEPN terminal, use a separate power supply
as VCC, not the same power supply as AVDD.
* When VCC is used as AVDD, see Startup Sequence (page 12 and 13).
16
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