9397 750 13356

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Preliminary data sheet

Rev. 01 — 1 October 2004

7 of 34

Philips Semiconductors

TDA8920B

2

× 100 W class-D power amplifier

When switching from standby to mute, there is a delay of 100 ms before the output starts

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 500 ms for the transition between standby and operating.

Fig 5.

Timing on mode selection input.

2.2 V

audio output

operating

standby

mute

50 %

duty cycle

> 4.2 V

0 V (SGND)

time

coa024

100 ms

50 ms

modulated PWM

> 350 ms

2.2 V

audio output

operating

standby

mute

50 %

duty cycle

> 4.2 V

0 V (SGND)

time

100 ms

50 ms

modulated PWM

> 350 ms