TDA8920B_2
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 02 — 07 November 2005
7 of 34
Philips Semiconductors
TDA8920B
2
×
100 W class-D power amplifier
Upper diagram: 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.
Lower diagram: 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 500 ms for the transition between standby and operating.
Fig 5.
Timing on mode selection input
2.2 V
<
V
mode
<
3 V
audio output
operating
standby
mute
50 %
duty cycle
>
4.2 V
0 V (SGND)
time
coa024
V
mode
100 ms
50 ms
modulated PWM
>
350 ms
2.2 V
<
V
mode
<
3 V
audio output
operating
standby
mute
50 %
duty cycle
>
4.2 V
0 V (SGND)
time
V
mode
100 ms
50 ms
modulated PWM
>
350 ms
