TDA8922B Datasheet, PDF (7/32 Pages) NXP Semiconductors – 2 X 50 W class-D power amplifier

Philips Semiconductors
TDA8922B
2 × 50 W class-D power amplifier
V_mode
> 4.2 V
50 %
duty cycle
audio output
modulated PWM
operating
2.2 V < V_mode < 3 V
mute
0 V (SGND) ^standby
100 ms
> 350 ms
time
50 ms
V_mode
> 4.2 V
50 %
duty cycle
audio output
modulated PWM
operating
2.2 V < V_mode < 3 V
mute
0 V (SGND) ^standby
100 ms
50 ms
> 350 ms
time
coa024
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_mode 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.
9397 750 13357
Preliminary data sheet
Rev. 01 — 1 October 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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