參數(shù)資料
型號(hào)： EB-120
廠商： Electronic Theatre Controls, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 20W Class D Single Channel Audio Amplifier
中文描述： 20瓦D類單聲道音頻放大器
文件頁(yè)數(shù)： 7/13頁(yè)
文件大?。?/td> 392K
代理商： EB-120
ATA-120
This is preliminary information on a new product. Specifications are subject to change without notice.
129 Morgan Drive, Norwood, MA 02062
voice: (781) 551-9450
CONTROLLED DOCUMENT: P_903-000009_Rev14 ATA-120 Data Sheet.doc
fax: (781) 440-9528
email: apogee@apogeeddx.com
DRN: PRELIMINARY Page 7 of 13
The maximum output voltage swing is ±V
DD
/2. For a given input signal voltage, where V
IN
(pk) is the peak input
voltage, the maximum voltage gain is
V
A
×
)
(
(max)
2
pk
IN
DD
V
V
=
Equation 2
This voltage gain setting results in the peak output voltage approaching it’s maximum for the maximum input
signal. In some cases the amplifier may be required to overdrive slightly, allowing the THD to increase at high
power levels, and thus a higher gain than A
V (max)
may be required.
5.2 Setting the Switching Frequency
The zero-signal switching frequency is a function of V
DD
, the capacitor C
8
and the feedback resistor R
1
. Lower
switching frequencies result in more inductor ripple, causing more quiescent output voltage ripple, increasing the
output noise and distortion. Higher switching frequencies result in more power loss. The optimum frequency is
between 600-700 kHz. Use the following steps, along with Figure 4, to select the appropriate timing capacitor,
C
INT
that will result in a recommended operating frequency of approximately 700 kHz:
1. Choose the Power supply voltage (V
DD
) based on output power requirements and the selected
speaker impedance.
2. Determine the voltage gain required to drive the amplifier to full output power.
=
2
V
2
V
RMS
-
IN
DD
Gain
×
×
Equation 3
3. The intersection of the V
DD
and Gain lines in Figure 4 will determine the C
INT
capacitor value.
4. Set the value of R
1
to the required gain times R
3
(fixed at 10K
).
5.2.1 EXAMPLE 1:
The reference design of Figure 3 uses a 1.0 V
RMS
input signal to drive a 4
speaker to 15 watts of sine wave
output (~20 watts @ 10% THD) using a 24 VDC power supply.
5. Select 24 V on the V
DD
scale (red line).
6. The required gain is:
V/V
8.5
Gain
2
V
2
IN
×
×
3. Since we used a more common 82K
feedback resistor in the design, we’ll follow the 8.2 V/V
line (red line) across on the gain scale in the graph.
Find where it intersects the voltage line.
Choose the closest capacitor line, C
INT
= 4.7 nF.
4. Multiply the voltage gain (not 8.5 but 8.2 based on the pre-selected resistor) by R3 (fixed at
10K
) to get the proper value of the R
1
gain-setting resistor, 82K.
5.2.2 EXAMPLE 2:
24V
=
=
Equation 4
A design with a 0.5 VRMS input signal is required to drive a 2
speaker to 9 watts of sine wave output (12 watts
@ 10% THD) using a 14 VDC power supply.
1. Select 14 V on the V
DD
scale (blue line).
2. The required gain is:
V/V
9.9
Gain
2
V
2
IN
×
×
3. Follow this value (blue line) across on the gain scale in the graph.
Find where it intersects the voltage line.
Choose the closest capacitor line, C
INT
= 1.8 nF.
14V
=
=
.
Equation 5
相關(guān)PDF資料
PDF描述
EB-2100 DDX All-Digital, High Efficiency Evaluation Amplifier
EB-2100M DDX All-Digital, High Efficiency Evaluation Amplifier
EB-2100S DDX All-Digital, High Efficiency Evaluation Amplifier
EB-2100x DDX All-Digital, High Efficiency Evaluation Amplifier
EB-230 Power Schottky Rectifier with common cathode
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EB12-12 制造商:BB Battery 功能描述:LEAD ACID 12V 12AH
EB1225 制造商:A-B 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:Kamaya Inc 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:Ohmite Mfg Co 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:Rockwell Automation / Allen-Bradley 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:SEI Stackpole Electronics Inc 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:SPEER 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:TRW Inc 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5% 制造商:TRW/- 功能描述:RES,CARBON COMP,1/2 WATT,1.2k OHM,5%
EB1245 制造商:AB 功能描述: 制造商:Rockwell Automation / Allen-Bradley 功能描述: 制造商:Ohmite Mfg Co 功能描述:RES,CARBON COMP,1/2 WATT,120k OHM,5% 制造商:Rockwell Automation / Allen-Bradley 功能描述:RES,CARBON COMP,1/2 WATT,120k OHM,5% 制造商:SEI Stackpole Electronics Inc 功能描述:RES,CARBON COMP,1/2 WATT,120k OHM,5% 制造商:SPEER 功能描述:RES,CARBON COMP,1/2 WATT,120k OHM,5% 制造商:TRW Inc 功能描述:RES,CARBON COMP,1/2 WATT,120k OHM,5%
EB12C 制造商:CERTEX BRIDON LIFTING SYSTEMS 功能描述:12MM EYEBOLT
EB1310 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*