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參數(shù)資料
| 型號： | TDA8924TH/N2,518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 120 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封裝： | PLASTIC, SOT-566-3, HSOP-24 |
| 文件頁數(shù)： | 33/35頁 |
| 文件大?。?/td> | 722K |
| 代理商： | TDA8924TH/N2,518 |
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2003 Jul 28
7
Philips Semiconductors
Objective specication
2
× 120 W class-D power amplier
TDA8924
handbook, full pagewidth
audio
operating
mute
standby
4 V
2 V
0 V (SGND)
time
Vmode
100 ms
>50 ms
switching
audio
operating
standby
4 V
0 V (SGND)
time
MBL465
Vmode
100 ms
50 ms
switching
Fig.4 Timing on mode select input.
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.
When switching 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.
8.2
Pulse width modulation frequency
The output signal of the amplifier is a PWM signal with a
carrier frequency of approximately 350 kHz. Using a
2nd-order LC demodulation filter in the application results
in an analog audio signal across the loudspeaker.
This switching frequency is fixed by an external resistor
ROSC connected between pin OSC and VSSA. With the
resistor value given in the schematic diagram of the
reference design, the carrier frequency is typical 350 kHz.
The carrier frequency can be calculated using the
following equation:
If two or more class-D amplifiers are used in the same
audio application, it is advisable to have all devices
operating at the same switching frequency.
This can be realized by connecting all OSC pins together
and feed them from an external central oscillator. Using an
external oscillator it is necessary to force pin OSC to a
DC-level above SGND for switching from internal to an
external oscillator. In this case the internal oscillator is
disabled and the PWM will be switched to the external
frequency. The frequency range of the external oscillator
must be in the range as specified in the switching
characteristics; see Chapter 13.
f
osc
910
9
×
R
OSC
------------------- Hz
=
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| TDA8925 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8925J | 制造商:Panasonic Industrial Company 功能描述:IC |
| TDA8925J/N1,112 | 功能描述:IC AMP AUDIO PWR 20W STER 17SIL RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| TDA8925ST | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Power stage 2 x 15 to 25Wclass-D audio amplifier |
| TDA8925ST/N1,112 | 功能描述:IC AMP AUDIO PWR 20W STER 17SIL RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
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