Datasheet > ft2725P

ft2725P

更新时间： 2025-07-10 01:22:31

品牌	Logo	应用领域
FANGTEK		/
页数	文件大小	规格书
26页	1459K
描述
2X11W Stereo Class-D Audio Power Amplifier with ALC & DRC

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ft2725P 数据手册

ft2725

2X11W Stereo Class-D Audio Power Amplifier

with ALC & DRC

GENERAL DESCRIPTION

FEATURES



Wide supply voltage range from 3.7V to 9V

Automatic level control with adjustable threshold

High efficiency up to 89%

The ft2725 is a highly efficient 2X11W stereo Class-D

audio power amplifier with automatic level control (ALC)

and dynamic range compression (DRC). It operates

with a wide range of supply voltages from 3.7V to 9V.

When powered with 9V supply voltage, the ft2725 is

capable of delivering 11W per channel into a pair of 4Ω

speakers in a bridge-tied-load (BTL) configuration, or

15W into a single 3Ω speaker in parallel BTL (PBTL)

configuration, with 10% THD+N.

Maximum output power in Non-ALC mode

(VDD=9V, VALC>0.8*GVDD, 10% THD+N)

6W/Ch (8Ω load)

11W/Ch (4Ω load)

15W (3Ω load in PBTL configuration)



ALC output power in ALC Mode

(VDD=9V, VALC=0V, 0.3% THD+N)

The ft2725 features ALC with an adjustable threshold

for dynamic range control (DRC). The ALC constantly

monitors and safeguards the audio outputs against a

user-defined threshold 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 amplifiers proportionally to eliminate output

4.5W/Ch (8Ω load)

8.5W/Ch (4Ω load)

11.5W (3Ω load in PBTL configuration)

Low THD+N: 0.06%

(VDD=9V, f=1kHz, 4Ω load, Po=5W)



High PSRR: 76dB @ 1kHz

Wide ALC dynamic range: 10dB

Maximum voltage gain: 32.4dB

Volume fade-in and fade-out

clipping while maintaining

maximally-allowed

dynamic range of the audio outputs. The threshold

voltage of the ALC can be set at either the supply

voltage or an externally defined value.

Optional spread-spectrum (SS) audio outputs to

suppress EMI



Optional mono mode for PBTL configuration with

low-impedance audio speakers

As a filterless Class-D audio amplifier, the ft2725

features high efficiency (up to 89%), high PSRR (76dB

at 1kHz), and low EMI emissions, which reduce design

and manufacturing complexities, lower system cost and

PCB space.

Auto-recovering over-current & short-circuit

protection

 Available in TSSOP-24L package

In ft2725, comprehensive protection features against

various operating faults ensure its safe and reliable

operation.

APPLICATIONS



Blue Tooth Speakers

Performance Audio Speakers

TV/Monitors

APPLICATION CIRCUIT

VDD

RAVDD 10Ω

CVDD

10uF

CVDD

220uF

CBYP

1uF

AGND

BYP

CINL1 0.33uF

CINR1

0.33uF

RINL1

RINL2 10K

10K

RINR1 10K

INNL

INPL

INNR

INNL

INPL

INNR

INPR

10K

RINR2

CINL2

0.33uF

CINR2

0.33uF

INPR

CGVDD

2.2uF

CAVDD

1uF

GVDD

ALC

AVDD

ATT

ALC

ATT

VDD

PVDDL

VOPL

PGNDL

VONL

PVDDL

PVDDR

VOPR

PGNDR

VONR

PVDDR

PBTL

CPVDDL

1uF

CPVDDR

1uF

4.7Ω 10nF

4.7Ω

10nF

LSL

LSR

SPEAKER

PBTL

MUTE

ft2725

Figure 1: Typical Audio Power Amplifier Application Circuit

DEC, 2017

www.fangtek.com.cn

12 3 4 5 6 7...26

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