TDA8922C NXP Semiconductors, TDA8922C Datasheet - Page 7

• Manufacturer Part Number: TDA8922C
• Description: The TDA8922C is a high-efficiency Class D audio power amplifier
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8922C_1
Product data sheet
To ensure the coupling capacitors at the inputs (C
the outputs start switching, a delay is inserted during the transition from Mute to Operating
mode. An overview of the start-up timing is provided in
Fig 5.
(1) First
2.1 V < V
2.1 V < V
Upper diagram: When switching from Standby to Mute, there is a delay of approximately 100 ms
before the output starts switching. The audio signal will become available once V
Operating mode level (see
pop noise-free, it is recommended that the time constant applied to pin MODE be at least 350 ms
for the transition between Mute and Operating modes.
Lower diagram: When switching directly from Standby to Operating mode, there is a delay of
100 ms before the outputs start switching. The audio signal becomes available after a second
delay of 50 ms. To start-up pop noise-free, it is recommended that the time-constant applied to pin
MODE be at least 500 ms for the transition between Standby and Operating modes.
Timing on mode selection input pin MODE
1
MODE
MODE
4
pulse down.
0 V (SGND)
0 V (SGND)
> 4.2 V
< 2.9 V
> 4.2 V
< 2.9 V
V
V
MODE
MODE
Rev. 01 — 7 September 2009
standby
standby
Table
8), but not earlier than 150 ms after switching to Mute. To start-up
duty cycle
duty cycle
100 ms
100 ms
50 %
50 %
mute
mute
(1)
(1)
50 ms
50 ms
IN
in
Figure
2
Figure
modulated PWM
modulated PWM
75 W class-D power amplifier
audio output
audio output
operating
operating
> 350 ms
> 350 ms
10) are fully charged before
5.
TDA8922C
© NXP B.V. 2009. All rights reserved.
MODE
010aaa584
time
time
reaches the
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