Description:
The LYTSwitch™-1 family is ideal for single-stage, high PF, constant current LED bulbs and tubes. The family incorporates a high-voltage MOSFET with a variable on-time CrM controller. Extensive protection features with minimum external Components provide industry leading power density and functionality. The devices can be used in high-side or low-side non-isolated buck topology. The CrM operation results in low turn-on losses and reduces cost of output diode (slower reverse recovery). LYTSwitch-1 devices are suitable for applications from 2 W to 22 W. See Table 1 for selection guidance.
Product Highlights :
Single-Stage PFC + Accurate CC Output
• ±3% CC regulation in single line input voltage applications
• Power factor >0.9
• High efficiency >93%
• Robust 725 V MOSFET for increased line voltage surge performance
• Critical Conduction Mode (CrM) buck
• Low EMI
• Excellent line noise and transient rejection
Design Flexibility
• Supports high- and low-side buck topologies
• Wide input (90 VAC – 308 VAC) and output voltage range operation
• 3 family members cover power range for optimum device selection
• Requires no inductor bias winding
Highest Reliability
• Lowest component count
• Comprehensive protection features with auto-restart
• Input and output overvoltage protection (OVP)
• Output short-circuit protection
• Open-loop protection
• Advanced thermal control
• Thermal foldback ensures that light continues to be delivered at
elevated temperatures
• Over-temperature shutdown provides protection during fault
conditions
(Picture:Pinout / Diagram)
