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參數(shù)資料
| 型號： | EV0030 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 20W Class D Mono Single Ended Audio Amplifer |
| 中文描述： | D類單聲道20瓦單端音頻放大器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 344K |
| 代理商： | EV0030 |
MP7720 – 20W CLASS D MONO SINGLE ENDED AUDIO AMPLIFIER
MP7720 Rev. 1.9
3/13/2006
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
OPERATING SPECIFICATIONS
Circuit of Figure 1, V
DD
= 24V, V
EN
= 5V, T
A
= +25
°
C, unless otherwise noted.
Parameters
Symbol Condition
Standby Current
Quiescent Current
Min
Typ
130
13
Max
Units
μA
mA
V
EN
= 0V
f = 1KHz, THD+N = 10%,
4
Load
f = 1KHz, THD+N = 10%,
8
Load
P
OUT
= 1W, f = 1KHz, 4
Load
P
OUT
= 1W, f = 1KHz, 8
Load
f = 1KHz, P
OUT
= 1W, 4
Load
f = 1KHz, P
OUT
= 1W, 8
Load
A-Weighted
f = 1KHz
20
W
Power Output
10
W
0.08
%
THD+ Noise
0.04
%
90
%
Efficiency
95
%
Maximum Power Bandwidth
Dynamic Range
Noise Floor
Power Supply Rejection
20
93
190
60
KHz
dB
μV
dB
PIN FUNCTIONS
Pin #
Name Description
Amplifier Positive Input. PIN is the positive side of the differential input to the amplifier. Use a
resistive voltage divider to set the voltage at PIN to V
DD
/2. See Figure 1.
Amplifier Negative Input. NIN is the negative side of the differential input to the amplifier. Drive
the input signal and close the feedback loop at NIN. See Figure 1.
AGND Analog Ground. Connect AGND to PGND at a single point.
EN
Enable Input. Drive EN high to turn on the amplifier, low to turn it off.
High-Side MOSFET Bootstrap Input. A capacitor from BS to SW supplies the gate drive
current to the internal high-side MOSFET. Connect a 0.1μF capacitor from SW to BS. Place a
6.2V zener diode from BS to SW to prevent overstressing of the internal circuitry.
Power Supply Input. VDD is the drain of the high-side MOSFET switch, and supplies the
power to the output stage and the MP7720 internal control circuitry. In addition to the main
bulk capacitor, bypass VDD to PGND with a 1μF X7R capacitor placed close to pins 6 and 8.
Switched Power Output. SW is the output of the MP7720. Connect the LC filter between SW
and the output coupling capacitor. See Figure 1.
PGND Power Ground. Connect PGND to AGND at a single point.
1
PIN
2
NIN
3
4
5
BS
6
VDD
7
SW
8
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