34W Ultra-Low EM Cutting-off Stereo Class D Audio Power Amplifier

Characteristic

Anti-Clipping Function, ACF)

Super-excellent full-bandwidth EM suppression performance

Direct Drive Loudspeaker without Lc Filter Digital Modulation

High output power

3. 4W@VDDP=VoDA=5.0V, RL=40, THD+N=10%

1.9W@VDDP=VDDA 50V, RL=8Q, THD+N=10%

high efficiency

85%@VDDP=VDDA=5.0V, RL=402, P=1W

Low THD+N

01%@Vop=VoA=50V, R=4, P. =

Channel isolation

80dB@fN=1kHz, A=18dB

High SNR:

90dB@ VDDP = VoDA = 5.0V, A, = 18dB

Excellent Pop-Click Noise Suppression Performance

Mute

Independent channel closure

Overcurrent Protection Function and Overheat Protection Function

Undervoltage Abnormal Protection Function

Lead-free package TSSOP20QFN20

Application

Portable speaker UsB speaker, FM plug-in speaker

MP3MP4 dock

Portable Game Player Digital Photo Frame

Mobile phones, laptops

Small size LcD TV/monitor

Talk about

Sc1808 is an ultra-low EM, anti-top distortion function

Class D Audio Power Amplifier in Power Supply

The output is as high as 10%40 under the condition of 5V and THD+N=10%40 negative voltage.

34W power provides comparable performance to class AB amplifiers

The efficiency is as high as 90%.

The biggest characteristic of sc1808 is the output of AcF.

The control function can detect and suppress the input music and speech signal amplitude.

The output signal distortion caused by overshooting can also be self-contained.

Adaptively prevent power supply voltage drop in battery applications

Output topping significantly improves sound quality and creates very comfortable music enjoyment

It also protects the loudspeaker from damage caused by overload. By attaching no to the AcRc terminal

The same resistance capacitance can flexibly set the amplifier's sound quality and output power.

At the same time, the chip provides ACFO mode.

SC1808 adopts unique electromagnetic radiation (EM) suppression technology

Radiation level with excellent full-bandwidth low radiation performance is not on duty

He Aided Design is still far below the FCC Part15 Class B standard

The value reduces the difficulty of EMC design.

Sc1808 internal integrated filter-free digital modulation technology can

Direct drive loudspeaker and minimize the loss of pulse output signal

True and noisy. Few external components save system space and cost.

It is an ideal choice for portable applications.

In addition, the built-in shutdown function of Sc1808 minimizes standby current

It also integrates mute function, independent turn-off of left and right channel, speaker.

Output Overcurrent Protection, On-chip Overtemperature Protection and Undervoltage Abnormal Protection

It can be packaged in lead-free TSSOP20 and QFN20.