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8V Charge Pump Class-D/AB SPC PA


FS1559N is an analog-input SPC PA chip. It has high performance while low power consumption. Cooperating with FourSemi Smart Power Control and FS Sound audio algorithm, it applies to mobile phones, tablets, smart watches, smart home audio, etc.


● High performance Class-D/AB analog audio amplifier powered by adaptive 2x Charge-Pump

- Ultra-low noise

- Receiver mode: 7.5µV

- Speaker mode: 26µV

- THD+N <0.02% at 1W Class-D

- PSRR above 80dB at 217Hz

- Super TDD noise suppression

● High performance Charge-Pump

- 2x Charge-Pump

- Support adaptive mode for best efficiency

- Charge-Pump efficiency up to 91%


● 1.8V I2C control

- Enable and Disable

- Mode, Gain and Control parameters

● Support high power receiver stereo application

● Support speaker and receiver 2-in-1 application

● Support t Class-D/AB for speaker and receiver mode

● Support Power Limiter function

● Support Battery Safeguard function

● Include UVP,OVP, OTP, OLP and OCP protection

● Support FourSemi Smart Power Control algorithm of advanced audio enhancement and Speaker protection

Package Size

8V Charge Pump Class-D/AB SPC PA
Part NumberPackageSize(mm)
FS1599NFCQFN-16L2 x 2.5

Block Diagram