參數(shù)資料
型號(hào)： ZXCD1010EQ16
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)： 4/12頁
文件大?。?/td> 555K
代理商： ZXCD1010EQ16
ZXCD1010 Class D controller IC
A functional block diagram of the ZXCD1010 is shown
in Figure 2. The on chip series regulators drop the
external V
CC
supply (12V-18V) to the approximate 9V
(9VA/9VB) and 5.5V (5V5) supplies required by the
internal circuitry.
A triangular waveform is generated on chip and is
brought out at the OscA and OscB outputs. The
frequency of this is set (to ~200kHz) by an external
capacitor (C
osc
) and resistor (R
osc
). The triangular
waveform must be externally AC coupled back into the
ZXCD1010 at the TriangleA and TriangleB inputs.
AC coupling ensures symmetrical operation resulting
in minimal system DC offsets. TriangleA is connected
to one of the inputs of a comparator and TriangleB is
connected to one ofthe inputs ofa second comparator.
The other inputs of these two comparators are
connected to the AudioA and AudioB inputs, which are
anti-phase signals externally derived from the audio
input. The triangular wave is an order higher in
frequency than the audio input (max 20kHz). The
outputs of the comparators toggle every time the
TriangleA/B and the (relatively slow) AudioA/B signals
cross.
ZXCD1010
S E M IC O N D U C T O R S
ISSUE 3 - NOVEMBER 2003
4
Out A
Buffers
Figure 2
Functional Block Diagram
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