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參數(shù)資料
| 型號(hào)： | EV0045 |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 5W - 30W Class D Mono Bridged Audio Amplifier |
| 中文描述： | 5W -功率30W D類單聲道橋接音頻放大器 |
| 文件頁(yè)數(shù)： | 5/9頁(yè) |
| 文件大?。?/td> | 279K |
| 代理商： | EV0045 |
MP7731 – 5W – 30W CLASS D MONO BRIDGED AUDIO AMPLIFIER
MP7731 Rev. 1.8
9/25/2006
www.MonolithicPower.com
5
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin #
1, 5, 11, 16
2
Name
Description
No Connect – Not internally connected
Amplifier 1 Positive Input. PIN1 is the positive side of the differential input to Amplifier 1.
Use a resistive voltage divider to set the voltage at PIN1 to V
DD
/2. See Figure 1.
Amplifier 1 Negative Input. NIN1 is the negative side of the differential input to Amplifier
1. See Figure 1.
Analog Ground 1. Connect AGND1 to AGND2.
Enable Input 1. EN1 must be connected to EN2. Drive high to enable MP7731, drive
low to disable.
Amplifier 2 Negative Input. NIN2 is the negative side of the differential input to Amplifier
2. See Figure 1.
Amplifier 2 Positive Input. PIN2 is the positive side of the differential input to Amplifier 2.
Use a resistive voltage divider to set the voltage at PIN2 to V
DD
/2. See Figure 1.
Analog Ground 2. Connect AGND2 to AGND1.
Enable Input 2. EN2 must be connected to EN1. Drive high to enable MP7731, drive
low to disable.
High-Side MOSFET Bootstrap Input for Amplifier 2. A capacitor from BS2 to SW2
supplies the gate drive current to the internal high-side MOSFET. Connect a 1μF
capacitor from SW2 to BS2. See Figure 1.
Power Supply Input. Bypass VDD2 to PGND2 with a 1μF X7R capacitor (in addition to
the main bulk capacitor), placed close to the IC PIN13 and PIN15.
Switched Power Output. SW2 is the output of Amplifier 2. Connect the LC filter to this
pin. See Figure 1.
Power Ground for Amplifier 2. Connect PGND2 to PGND1. See Figure 1.
High-Side MOSFET Bootstrap Input for Amplifier 1. A capacitor from BS1 to SW1
supplies the gate drive current to the internal high-side MOSFET. Connect a 1μF
capacitor from SW1 to BS1. See Figure 1.
Power Supply Input. Bypass VDD1 to PGND1 with a 1μF X7R capacitor (in addition to
the main bulk capacitor), placed close to the IC PIN18 and PIN20.
Switched Power Output. SW1 is the output of Amplifier 1. Connect the LC filter to this
pin. See Figure 1.
Power Ground for Amplifier 1. Connect PGND1 to PGND2. See Figure 1.
NC
PIN1
3
NIN1
4
6
AGND1
EN1
7
NIN2
8
PIN2
9
10
AGND2
EN2
12
BS2
13
VDD2
14
SW2
15
17
PGND2
BS1
18
VDD1
19
SW1
20
PGND1
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