NS4205 View Datasheet(PDF) - Unspecified
Part Name
Description
Manufacturer
NS4205 Datasheet PDF : 15 Pages
| |||
Output Power vs Supply Voltage
0.3
0.25
Vdd = 5V,f =1kHz
RL =16Ω,Single Ended
BW<80kHz
0.2
0.15
0.1
10% THD+N
0.05
1% THD+N
0
2 2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE(V)
NS4205
3W双声道D类音频功放
Output Power vs Supply Voltage
0.15
0.125
Vdd = 5V,f =1kHz
RL =32Ω,Single Ended
BW<80kHz
0.1
0.075
0.05
10% THD+N
0.025
1% THD+N
0
2 2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE(V)
9 NS4205 应用说明
9.1 芯片基本结构描述
NS4205 一款无需滤波器、D 类双声道音频功放。芯片内部每个通道集成了反馈电阻，放大器的增益
可以在外围通过输入电阻设置，BTL 输出。其原理框图如下：
7 INL
Rf
6,9
VDD
4,13
PVDD
Class-D
Modulator
Output
Stage
VoLN 3
VoLP 1
10 INR
Rf
Oscillat
or
Class-D
Modulator
Output
Stage
VoRN 14
VoRP 16
8 Bypass
12 SD
5 MUTE
Bias
OCP
GND
11
OTP
UVLO
NS4205
PGND
2,15
图3 NS4205 原理框图
Nsiway
12
Share Link: 