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TDA8922B 데이터시트(PDF) 7 Page - NXP Semiconductors |
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TDA8922B 데이터시트(HTML) 7 Page - NXP Semiconductors |
7 / 32 page 9397 750 13357 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 7 of 32 Philips Semiconductors TDA8922B 2 × 50 W class-D power amplifier When switching from standby to mute, there is a delay of 100 ms before the output starts switching. The audio signal is available after Vmode 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. 2.2 V < Vmode < 3 V audio output operating standby mute 50 % duty cycle > 4.2 V 0 V (SGND) time coa024 Vmode 100 ms 50 ms modulated PWM > 350 ms 2.2 V < Vmode < 3 V audio output operating standby mute 50 % duty cycle > 4.2 V 0 V (SGND) time Vmode 100 ms 50 ms modulated PWM > 350 ms |
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