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ft2830P PDF预览

ft2830P

更新时间: 2024-01-18 08:29:54
品牌 Logo 应用领域
FANGTEK /
页数 文件大小 规格书
26页 1211K
描述
4.5W Dual-PumpTM Class-G Audio Power Amplifier

ft2830P 数据手册

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ft2830  
4.5W Dual-PumpTM Class-G Audio Power Amplifier  
GENERAL DESCRIPTION  
FEATURES  
Proprietary Dual-PumpTM topology  
The ft2830 is a highly efficient 4.5W Class-G audio  
power amplifier with automatic level control (ALC) for  
use in battery-powered portable devices. It integrates a  
filterless Class-D audio power amplifier with a Class-G  
charge pump regulator based upon proprietary  
Dual-PumpTM topology. It operates from 3.2V to 4.6V  
supply. When operating with a 4.2V supply voltage, the  
ft2830 can deliver into a 4Ω load a maximum output  
power up to 4.5W with 10% THD+N, or a constant  
output power at 3.5W with 0.5% THD+N. Its high  
efficiency, up to 83%, helps extend battery life.  
Filterless Class-D audio amplifier integrated with a  
Class-G charge pump regulator  
Automatic level control to eliminate output clipping  
Maximum output power (Non-ALC Mode)  
4.5W (VDD=4.2V, THD+N=10%, RL=4Ω)  
3.6W (VDD=3.6V, THD+N=10%, RL=4Ω)  
Constant output power (ALC Mode)  
3.5W (VDD=4.2V, THD+N=0.5%, RL=4Ω)  
3.1W (VDD=3.6V, THD+N=0.5%, RL=4Ω)  
High efficiency up to 83%  
In ft2830, the power supply rail for the amplifier’s output  
stage is internally boosted and regulated at 6.2V by an  
adaptive charge pump regulator based upon the  
Dual-PumpTM topology, allowing for a much louder  
audio output than a stand-alone one directly connected  
to the battery. It makes ft2830 an ideal audio solution  
for portable devices that are powered by a single-cell  
lithium battery while requiring higher audio loudness.  
Low THD+N: 0.05%  
(VDD=3.6V, f=1kHz, RL=4Ω, Po=1W)  
ALC dynamic range: 10dB  
Low quiescent current: 2.6mA @ VDD=3.6V  
High PSRR: 70dB at 1kHz  
Two gain settings: 24dB and 27.6dB  
One-wire pulse control to set operating mode and  
voltage gain  
For applications where minimum EMI emission is  
required, the charge pump regulator can be disabled.  
Auto-recovering short-circuit protection  
Available in TSSOP-20L package  
The ft2830 features ALC to constantly monitor and  
safeguard the audio outputs against the boosted supply  
voltage, preventing output clipping distortion, excessive  
power dissipation, or hazardous speaker over-load.  
Once an over-level condition is detected, the ALC  
lowers the voltage gain of the audio amplifier  
proportionally to eliminate output clipping distortion  
while maintaining a maximum dynamic range of the  
audio outputs allowed by the boosted supply voltage.  
APPLICATIONS  
Portable Speakers  
Multimedia Internet Devices  
Mobile Phones  
Portable Consumer Electronic Devices  
APPLICATION CIRCUIT  
VDD  
CF1  
CF2 2.2uF  
2.2uF  
CCVDD  
10uF  
CN2  
CVDD CP1 CN1 CP2  
AVDD  
COUT  
10uF  
PVOUT  
CAVDD  
1uF  
470uF  
PVDD  
PGND  
H
ft2830  
EN  
EN  
L
CPENB  
INP  
CPENB  
VOP  
VON  
IN  
Cin 470nF  
INN  
GND  
Cin 470nF  
Figure 1: Typical Application Circuit Diagram  
JUN, 2017  
www.fangtek.com.cn  
1

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