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9.5V Boost SPC PA


FS1815N is an analog-input SPC PA chip integrated with Smart Power Control module. It has high performance while low power consumption. Cooperating with FourSemi FS Sound audio algorithm, it applies to mobile phones, tablets, smart watches, smart home audio, etc.


● Boost converter voltage up to 9.5V

● High performance Class-D amplifier

- 5.2W 1% THD+N (8Ω at 4.2V)

- 6.0W 1% THD+N (6Ω at 4.2V)

- 112dB SNR at 1% THD+N(8Ω at 4.2V, 18dB gain)

● High efficiency boost

- Total efficiency of boost + Class-D up to 82.5%

- Class-G adaptive boost control for longer battery life

● Ultra low noise

- 12μV (receiver mode, 7.5dB gain)

- 17μV (speaker mode, 18dB gain)

● High PSRR: 82dB (217Hz)

● Support differential or single-ended analog input 

● Integrated SPC (Smart Power Control) module

● Battery Safeguard Protection

● Thermal foldback

● Thermal and overcurrent prevention

● Support 1.8V logic I2C control

Package Size

9.5V Boost SPC PA
Part NumberPackageSize(mm)
FS1815NFCQFN-20L2 x 3

Block Diagram