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%
- VDDP OVP=8V
● 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
| Part Number | Package | Size(mm) |
| FS1599N | FCQFN-16L | 2 x 2.5 |
FourSemi was founded in 2016. The founding team comes from well-known international semiconductor companies, such as Qualcomm, NXP, Texas Instruments, etc. The core backbone team all have more than 20 years of semiconductor industry experience. FourSemi focuses on high-performance digital-analog hybrid chip design. Products cover smart PA, audio power amplifier, haptics driver, car audio, professional audio system and are widely used in mobile phones, tablets, wearable devices, smart speakers, automotive applications, personal computers , etc.
FourSemi launched domestic Smart PA FS1601 and large power amplifier FS2105 in 2017 and 2021 respectively, achieving a breakthrough in this field in China.