TDA8922B NXP Semiconductors, TDA8922B Datasheet - Page 7

• Manufacturer Part Number: TDA8922B
• Description: The TDA8922B is a high efficiency class-D audio power amplifier with very lowdissipation
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13357
Preliminary data sheet
Fig 5. Timing on mode selection input.
When switching from standby to mute, there is a delay of 100 ms before the output starts
switching. The audio signal is available after V
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
2.2 V
2.2 V
V
V
0 V (SGND)
0 V (SGND)
mode
mode
V
V
4.2 V
4.2 V
mode
mode
3 V
3 V
Rev. 01 — 1 October 2004
standby
standby
duty cycle
duty cycle
100 ms
100 ms
50 %
50 %
mute
mute
50 ms
50 ms
mode
has been set to operating, but not earlier
2
modulated PWM
modulated PWM
audio output
audio output
operating
operating
50 W class-D power amplifier
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
350 ms
350 ms
TDA8922B
coa024
time
time
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