TDF8590TH 데이터 시트보기 (PDF) - NXP Semiconductors.
부품명
상세내역
제조사
TDF8590TH Datasheet PDF : 30 Pages
| |||
NXP Semiconductors
TDF8590TH
2 × 80 W SE (4 Ω) or 1 × 160 W BTL (8 Ω) class-D amplifier
The value of the RC time constant should be dimensioned for 500 ms. If the 100 µF
capacitor is left out of the application the voltage on pin MODE will be applied with a much
smaller time constant, which might result in audible pop noises during start-up (depending
on DC output offset voltage and used loudspeaker).
In order to fully charge the coupling capacitors at the inputs, the amplifier will remain
automatically in Mute mode for approximately 150 ms before switching to Operating
mode. A complete overview of the start-up timing is given in Figure 4.
VMODE
5V
2.5 V
mute
standby
0 V (SGND)
100 ms
>50 ms
audio
switching
operating
time
VMODE
5V
audio
switching
operating
standby
0 V (SGND)
100 ms
Fig 4. Timing on mode selection input
50 ms
time
001aad837
6.3 Pulse width modulation frequency
The output signal of the amplifier is a PWM signal with a switching frequency that is set by
an external resistor Rext(OSC) connected between pins OSC and VSSA. An optimum setting
for the carrier frequency is between 300 kHz and 350 kHz. An external resistor Rext(OSC) of
30 kΩ sets the frequency to 310 kHz.
TDF8590TH_2
Product data sheet
Rev. 02 — 23 April 2007
© NXP B.V. 2007. All rights reserved.
5 of 30
Share Link: 