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YDA137 Datasheet

  • YDA137

  • D- 2 STEREO 5W DIGITAL AUDIO POWER AMPLIFIER

  • 20頁(yè)

  • YAMAHA

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YDA137
D- 2
STEREO 5W DIGITAL AUDIO POWER AMPLIFIER
鈻燨verview
YDA137 (D-2)
is a high efficient digital audio power amplifier IC that operates on a single 5V power supply.
With YDA137 in BTL connection, an audio power amplifier with a maximum output of 5W (R
L
=2惟)脳2ch can be
configured with one chip.
YDA137 converts an input analog data into a digital pulse by the digital modulation circuit in the IC and outputs a high
current digital pulse from the output buffer circuit. This digital pulse signal is converted into an audio signal by an
external low-pass filter and is output to the speaker.
Low-distortion rate characteristics and high S/N ratio are realized as a digital amplifier among same class, by adopting
Yamaha鈥檚 unique modulation system.
In addition, class AB headphone amplifier with output of 20mW (R
L
=16惟)脳2ch is embedded and switching between
digital amplifier output and headphone amplifier output can be done by the control of terminal termination.
YDA137 has the over-current protection function for speaker terminals, the high-temperature protection function for IC,
and the pop noise rejection function.
IC operation can be restricted by the two control signals of /SLEEP and /MUTE. /SLEEP signal can stop all functions and
decrease the consumption power to a minimum. In addition, /MUTE signal can pull-down the output buffer (hereinafter,
described as WL) and make the output mute.
鈻燜eatures
銉籋igh
Output Power
5.0 W
錛?/div>
V
DD
=5.0V, R
L
=2惟, THD+N<10%
3.7 W
錛?/div>
V
DD
=5.0V, R
L
=3惟, THD+N<10%
3.0 W
錛?/div>
V
DD
=5.0V, R
L
=4惟, THD+N<10%
銉籋igh
Efficient Operation
75 %
錛?/div>
V
DD
=5.0V, R
L
=2惟, Po=5W
80 %
錛?/div>
V
DD
=5.0V, R
L
=3惟, Po=3W
銉籐ow
Distortion Rate (THD+N)
0.03 %
錛?/div>
1kHz, R
L
=2惟, Po=2.5W
0.02 %
錛?/div>
1kHz, R
L
=3惟, Po=1.5W
銉籋igh
S/N Ratio
105dB
錛燰
DD
=5.0V, input sensitivity 1.0Vrms,
R
L
=2惟, Po=5W
98dB
錛燰
DD
=5.0V, input sensitivity 150mVrms,
R
L
=2惟, Po=5W
銉籌C
Low Consumption Current
25 mA
錛?/div>
V
DD
=5.0V, no signal (no filter)
10 mA
錛?/div>
V
DD
=5.0V, at mute
1 碌A(chǔ)
錛?/div>
V
DD
=5.0V, at sleep
銉籆S(Channel
Separation)
80dB
錛?/div>
1kHz
銉籆lass
AB headphone amp. is embedded.
20mW
錛?/div>
V
DD
=5.0V, R
L
=16惟, THD+N<1.0%
銉籄rbitral
gain setting with external resistor is possible.
銉籗leep
function by /SLEEP terminal
銉籓utput
mute function by /MUTE terminal
銉籓utput
Over-Current Protection Function
(Ground short-circuit/Load short-circuit)
銉籓ver-Temperature
Protection Function
銉籄uto
Resume Function from Over-Current,
High-Temperature Protection.
銉籑onaural
Function by /MONO terminal
銉籔op
Noise Rejection Function at power-up or
power-cutoff.
銉籄nalog
input / BTL(Bridge-Tied Load) output
銉?8pin
plastic TSSOP
pin lead plating with Pd-free (YDA137-AZ)
YDA137 CATALOG
CATALOG No.:LSI-4DA137A30
2005.1

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