Summary

SC2309 is a class S audio power amplifier with built-in BOOST boost module. The built-in BOOST boost module can be used through the external

Resistor-regulated boost value, even if supplied by lithium battery, can continuously output 9.0 W power under 10% THD+N, 3 load when boost voltage is 8.0 V. It supports external setting to adjust BOOST output voltage.

The biggest characteristic of SC2309 is the output control function of NCN, which can detect and suppress the output signal distortion caused by the excessive amplitude of input music and voice signal. It can also self-adaptively prevent the output crowning caused by the decrease of BOOST boost voltage, significantly improve the sound quality, create a very comfortable audio enjoyment, and protect the loudspeaker from overload. Damage. At the same time, the chip has NCN-Off mode.

SC2309 has the function of free switching between class AB and class D. It can switch to class AB audio power amplifier mode at any time when disturbed by EMI interference of class D power amplifier.

SC2309 integrates filter-free digital modulation technology, which can directly drive the loudspeaker and minimize the distortion and noise of the pulse output signal. The output does not need a filter network, and very few external components save system space and cost. It is an ideal choice for portable applications.

In addition, the built-in shutdown function of SC2309 minimizes standby current, and integrates the functions of output overcurrent protection, on-chip overtemperature protection and power supply under-voltage abnormal protection.

Characteristics

Anti-distortion function

Excellent full bandwidth EMI suppression performance

Filter-free digital modulation, direct drive loudspeaker

Output power

9.0 W (VBAT = 4.2V, PVDD = 8.0V, RL = 3, THD + N = 10%)

Power supply

- Boost input VBAT: 2.5V to 5.5V

Boost output PVDD: VBAT to 8.0V BOOST output voltage adjustabl

Overcurrent protection function

Overheat protection function

Undervoltage Abnormal Protection Function

Overvoltage protection function

Lead-free package, SOP16L-PP

Application of n

Bluetooth speaker portable speaker

2.1-channel speaker amplifier

IPhone / iPod / iPod docking * MP4, navigator * tablet computer, laptop * smart phone * small LCD TV / monitor * portable game machine