TDA8920B NXP Semiconductors, TDA8920B Datasheet - Page 7

• Manufacturer Part Number: TDA8920B
• Description: The TDA8920B is a high efficiency class-D audio power amplifier with very lowdissipation
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TDA8920B_2
Product data sheet
Fig 5. Timing on mode selection input
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
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.
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. 02 — 07 November 2005
standby
standby
duty cycle
duty cycle
100 ms
100 ms
50 %
50 %
mute
mute
50 ms
50 ms
2
mode
modulated PWM
modulated PWM
100 W class-D power amplifier
audio output
audio output
operating
operating
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
350 ms
350 ms
has been set to operating, but
TDA8920B
coa024
time
time
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