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參數(shù)資料
| 型號： | ZXCD1000EQ16 |
| 廠商： | ZETEX PLC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION |
| 中文描述： | 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 1226K |
| 代理商： | ZXCD1000EQ16 |
With no audio input signal applied, the AudioA/B
inputs are biased at the mid-point of the triangular
wave, and the duty cycle at the output of the
comparatorsisnominally50%. As theAudioA/Bsignal
ascends towards the peak level, the crossing points
with the (higher frequency) triangular wave also
ascend. The comparator monitoring these signals
exhibits a corresponding increase in output duty cycle.
Similarly, as the AudioA/B signal descends, the duty
cycleiscorrespondinglyreduced. Thustheaudioinput
Pulse Width Modulates the comparator outputs. This
principle is illustrated in Figures 3a, b, c and d. The
comparator outputs are buffered and used to drive the
OutAandOutBoutputs.Theseinturndrivethespeaker
load (with the audio information contained in the PWM
signal) via the off chip output bridge and single stage
L-C filter network.
The ramp amplitude is approximately 1V. The AudioA,
AudioB, TriangleA and TriangleB inputs are internally
biased to a DC voltage of approximately VCC/5. The
mid - point DC level of the OscA and OscB triangular
outputs is around 2V. The triangular wave at the Cosc
pin traverses between about 2.7Vand 3.8V and the dist
pin exhibits a roughly square wave from about 1.4V to
2V. (The above voltages may vary in practice and are
included for guidance only).
ZXCD1000
ISSUE 2 - APRIL 2002
5
Audio A/B
Triangle A/B
PWM Comparator
O/P
Audio A/B
Triangle A/B
Comparator O/P
(Duty Cycle = 50%)
O/P
Audio A/B
Triangle A/B
Comparator O/P
(Duty Cycle = 75%)
Audio A/B
Triangle A/B
Comparator O/P
(Duty Cycle = 25%)
Figure 3d.
Figure 3b.
Figure 3a.
Figures 3a,3b,3c and 3d
The audio input Pulse Width Modulates the comparator output.
Figure 3c.
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| ZXCD1000EQ16TA | 功能描述:音頻放大器 Class D Cont IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| ZXCD1000EQ16TC | 功能描述:音頻放大器 Class D Cont IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| ZXCD1000MOKIT | 功能描述:器件套件 ZXCD mono Kit RoHS:否 制造商:AVX 零部件類型: |
| ZXCD1000STKIT | 功能描述:器件套件 ZXCD mono Kit RoHS:否 制造商:AVX 零部件類型: |
| ZXCD100MOEVAL | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:100W CLASS D AUDIO AMPLIFIER EVALUATION BOARD |
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