Switched Mode Power Supply Controller 16-Pin SO

The SSL4101T combines a controller for Power Factor Correction (PFC)and a flyback controller. Its high level of integration allows the design of a cost-effective LED lighting application power supply with a very low number of external components. The built-in green functions provide high efficiency at all power levels. This applies to quasi-resonant operation at high power levels, quasi-resonant operation with valley skipping, as well as to reduced frequency operation at lower power levels. At low power levels, the PFC switches off to maintain high efficiency.

• Integrated PFC and flyback controller
• True universal mains supply operation: 70 V (AC) to 305 V (AC)
• High level of integration, resulting in a:
• - very low external component count
• - cost-effective design
• On-chip start-up current source
• Valley/zero voltage switching for minimum switching losses
• Frequency limitation to reduce switching losses
• PFC is switched off when a low load is detected at the flyback output
• Valley switching for minimum switching losses
• Frequency reduction with fixed minimum peak current at low power operation
• Safe restart mode for system fault conditions
• Continuous mode protection by means of demagnetization detection
• UnderVoltage Protection (UVP) (foldback during overload)
• Accurate OverVoltage Protection (OVP) for both converters
• Open control loop protection for both converters
• IC overtemperature protection
• Low and adjustable OverCurrent Protection (OCP)
• General purpose input for latched protection