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TDA8922B 데이터시트(PDF) 7 Page - NXP Semiconductors

부품명 TDA8922B
상세설명  2 X 50 W class-D power amplifier
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8922B 데이터시트(HTML) 7 Page - NXP Semiconductors

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© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 1 October 2004
7 of 32
Philips Semiconductors
TDA8922B
2
× 50 W class-D power amplifier
When switching from standby to mute, there is a delay of 100 ms before the output starts
switching. The audio signal is available after Vmode has been set to operating, but not earlier
than 150 ms after switching to mute. For pop-noise free start-up it is recommended that the
time constant applied to the MODE pin is at least 350 ms for the transition between mute and
operating.
When switching directly from standby to operating, there is a first delay of 100 ms before the
outputs starts switching. The audio signal is available after a second delay of 50 ms. For
pop-noise free start-up it is recommended that the time constant applied to the MODE pin is at
least 350 ms for the transition between standby and operating
Fig 5.
Timing on mode selection input.
2.2 V
< Vmode < 3 V
audio output
operating
standby
mute
50 %
duty cycle
> 4.2 V
0 V (SGND)
time
coa024
Vmode
100 ms
50 ms
modulated PWM
> 350 ms
2.2 V
< Vmode < 3 V
audio output
operating
standby
mute
50 %
duty cycle
> 4.2 V
0 V (SGND)
time
Vmode
100 ms
50 ms
modulated PWM
> 350 ms


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