Overview
TP8321 is a high power factor primary feedback LED constant current driver chip with three-stage switch dimming function. The chip integrates a single-stage active power factor correction circuit, which is particularly suitable for high-performance isolated LED lighting system dimming applications with a full voltage input range of 85VAC~265VAC.
FEATUREs
• Integrated three-stage switch dimming function
• 100%, 50%, 10% dimming brightness
• Built-in single-stage active PFC function
• Low total harmonic distortion of input current
• Primary feedback constant current control, no secondary feedback circuit required
• Quasi-resonant switching mode, low switching loss
• ±3% LED output current accuracy
• Excellent line voltage regulation and load regulation
• Ultra-low startup current
• LED output open circuit protection
• LED output short circuit protection
• VCC power supply overvoltage protection
• VCC power supply undervoltage protection
• CS cycle-by-cycle current limiting
• Automatic restart function
• Chip overtemperature protection
• SOP8L package
APPLICATIONs
• LED bulbs, LED spotlights
• LED fluorescent lamps, LED downlights
• LED ceiling lamps, LED PAR lamps
• Other LED lighting