昌蒞（昌旸）科技股份有限公司(SQ)
SQ9920
This application note describes a constant current power module with high integration for full range
时间：2025-09-26 17:03:10
点击：0
产品详情
This application note describes a constant current power module with high integration for full range input voltage from 180VAC ~ 264VAC by adopting the SQ9920. Based on buck topology, the SQ9920 is able to achieve high current accuracy for lighting application. This application provides multiple advanced fault protections to enhance the systems safety, including natural open loop protection, VDD under-voltage lockout and thermal shut down. All protections have auto-restart mechanisms. Schematics, PCB Gerber, BOM, as well as typical performance are covered in details by this application note. A complete application circuit is depicted in Figure 4, which can work on input voltage range from 180VAC ~ 264VAC.
Key Features
Input from 180VAC/50Hz to 264VAC/50Hz, LED DC 80V/30mA output
Fixed frequency 65kHz buck converter and maximum efficiency > 81%
Peak current mode control and LED output current variation within ±3%
Built-in EMI solution (optional)
Minimum Bill of Material (BOM) for as few as 7 or 9(with EMI) external components
Dimension : 26mm× 15mm× 10mm
Typical application : GU10 lighting
