Datasheet > ft2830P

ft2830P

更新时间： 2024-10-03 01:19:39

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

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ft2830P 数据手册

ft2830

4.5W Dual-Pump^TMClass-G Audio Power Amplifier

GENERAL DESCRIPTION

FEATURES



Proprietary Dual-Pump^TMtopology

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-Pump^TMtopology. 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-Pump^TMtopology, 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

C_F1

C_F22.2uF

2.2uF

CCVDD

10uF

CN2

CVDD CP1 CN1 CP2

AVDD

C_OUT

10uF

PVOUT

CAVDD

1uF

470uF

PVDD

PGND

ft2830

CPENB

INP

CPENB

VOP

VON

Cin 470nF

INN

GND

Cin 470nF

Figure 1: Typical Application Circuit Diagram

JUN, 2017

www.fangtek.com.cn

12 3 4 5 6 7...26

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