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PDF YDA131 Data sheet ( Hoja de datos )
| Número de pieza | YDA131 | |
| Descripción | STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER | |
| Fabricantes | YAMAHA CORPORATION | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de YDA131 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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YDA131
D- 1
STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER
■Outline
The YDA131 is the high efficient digital audio power amplifier IC that operates on a single 5V power supply.
This IC is capable of providing output power of 2.5W/channel, which is at the highest level as a device on a single 5V
power supply. By adopting 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 equivalent class.
This IC accepts analog signal, converts it into digital pulse by the digital modulation circuitry and outputs the signal from
the large current capacity buffers. The digital pulse signal that is outputted from the output buffer is converted into audio
signal through an external low pass filter, and sent to the speakers.
This IC has the overcurrent detection function that detects short-circuiting of speaker terminal end and the high
temperature detection function that detects abnormal high temperature.
With the overcurrent detection function, this IC generates a warning signal when the current that flows in the output
buffers of left and right channels exceeds a fixed value. With the high temperature detection function, this IC generates a
warning signal when the junction temperature becomes abnormal.
Furthermore, this IC builds in function that mute an audio output and shut off all functions of the IC. By this function,
power consumption is restrained at the minimum.
■Features
・High output power
2.5 W @ VDD=5.0V, 4Ω (THD+N<10%)
・High efficiency operation
85 % @ VDD=5.0V, RL=8Ω
75 % @ VDD=5.0V, RL=4Ω
www.DataSh・eeLt4oUw.cdoimstortion(THD+N)
0.018 % @ Po=1.0W, 1kHz, RL=4Ω
・High signal to noise ratio
103dB @ VDD=5.0V, Input sensitivity =1.0V, RL=4Ω
97dB @ VDD=5.0V, Input sensitivity=150mV, RL=4Ω
・Low consumption current
14.0 mA @ VDD=5.0V, no signal(no filter)
7.0 mA @ VDD=5.0V, at mute
1 µA
@ VDD=5.0V, at sleep
・Channel separation
80dB @ 1kHz
・Any gain setting by external resistor
・Any setting of starting time by VREF capacitor
・Sleep function by SLEEP terminal
・Output mute function by MUTE terminal
・Over current detection function of speaker terminal end (Ground short-circuiting, Load short-circuiting)
・High temperature detection function
・Pop noise suppression function at turn-on and turn-off
・Analog input/BTL(Bridge-Tied Load)output
・24-pin plastic SSOP
Pin lead plating with Pd free (YDA13１-EZ)
YDA131 CATALOG
CATALOG No.:LSI-4DA131A40
2004.12
1 page  
YDA131
MUTE (Pin No.13) [Digital-IN]
This is the output shut-off control terminal.
The terminal controls both channels at the same time. When MUTE terminal is set at "H" level, all of the output buffer
terminals, OUTPL, OUTML, OUTPR and OUTMR output "L" level, and this IC changes in mute state.
When MUTE terminal is set at "L" level, all of the output buffer terminals, OUTPL, OUTML, OUTPR and OUTMR output
the digital pulse signal.
PROT (Pin No.7) [Digital-OUT]
This is the warning signal output terminal for both overcurrent detection and high temperature detection. PROT terminal
outputs "H" level when either of those detection circuitries detects a hazardous state.
For the method of controlling MUTE terminal and SLEEP terminal by using PROT terminal, refer to "Overcurrent
detection function and high temperature detection function" on page 7.
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5
5 Page 
YDA131
■Application circuit
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Outline of components that are connected externally to this IC.
CP1, CP3
Capacitors for stabilization of the power supply
CP2, CP4, RP2, RP4
Capacitors and resistors for stabilization of the power supply (snubber)
CR1 Capacitor for stabilization of reference voltage, and capacitor for stabilization of starting.
CI Input AC coupling capacitor: RI and CI form a high pass filter.
RI Inversion input resistor that determines the gain.
RF Feedback resistor for determining the gain.
CF Capacitor for input low pass filter.
LO
Output inductance: Being combined with CO, the component forms the secondary filter that
removes the high frequency and delivers an amplified audio signal to the load.
CO Output capacitor
DS Shottkey-diode for terminal protection (equivalent to 11EQS04)
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet YDA131.PDF ] | |
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