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參數(shù)資料
| 型號(hào)： | NCP9002 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 1.3 Watt Audio Power Amplifier with Fast Turn On Time |
| 中文描述： | 1.3瓦音頻功率放大器具有快速準(zhǔn)時(shí)打開(kāi) |
| 文件頁(yè)數(shù)： | 12/13頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | NCP9002 |
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NCP9002
http://onsemi.com
12
GainSetting Resistor Selection (R
in
and R
f
)
R
in
and R
f
set the closedloop gain of the amplifier.
In order to optimize device and system performance, the
NCP9002 should be used in low gain configurations.
The low gain configuration minimizes THD + noise
values and maximizes the signal to noise ratio, and the
amplifier can still be used without running into the
bandwidth limitations.
A closed loop gain in the range from 2 to 5 is
recommended to optimize overall system performance.
An input resistor (R
in
) value of 22 k is realistic in most
of applications, and doesn’t require the use of a too large
capacitor C
in
.
Input Capacitor Selection (C
in
)
The input coupling capacitor blocks the DC voltage at
the amplifier input terminal. This capacitor creates a
highpass filter with R
in
, the cutoff frequency is given by
fc
2 *
*Rin* Cin
The size of the capacitor must be large enough to couple
in low frequencies without severe attenuation. However a
1
.
large input coupling capacitor requires more time to reach
its quiescent DC voltage (V
p
/2) and can increase the
turnon pops when a single ended audio input is used.
An input capacitor value between 33 nF and 220 nF
performs well in many applications (With R
in
= 22 K ).
Bypass Capacitor Selection (Cby)
The bypass capacitor Cby provides halfsupply filtering
and determines how fast the NCP9002 turns on (see
Figure 21). With a differential audio input, the amplifier
will be a zero pop noise device no matter the bypass
capacitor.
With a single ended audio input, this capacitor is a
critical component to minimize the turnon pop. A 1.0 F
bypass capacitor value (C
in
= < 0.39 F) should produce
clickless and popless shutdown transitions. The amplifier
is still functional with a 0.1 F capacitor value but is more
susceptible to “pop and click” noises.
Thus, a 1.0 F bypassing capacitor is recommended.
ORDERING INFORMATION
Device
Marking
Package
Shipping
NCP9002FCT2G
MAZ
9Pin FlipChip CSP
(PbFree)
3000/Tape and Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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|---|---|
| NCP9002FCT2G | 功能描述:音頻放大器 ASEKT (TW4) AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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 |
| NCP9003 | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:Compact Backlight LED Boost Driver |
| NCP9003SNT1G | 功能描述:LED照明驅(qū)動(dòng)器 SBN_BE LED DRIEVR RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| NCP9004 | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:2.65 W Filterless Class−D Audio Power Amplifier |
| NCP9004FCT1G | 制造商:ON Semiconductor 功能描述:AUD AMP SPKR 1CH MONO 2.63W CLS-D 9PIN FLIP-CHIP - Tape and Reel 制造商:ON Semiconductor 功能描述:IC AMP POWER AUDIO CLASS D 2.65W |
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