主要特点
- 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
主要应用
概述
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.
Applications
- Industrial high-bay and low-bay lighting
- Commercial interior lighting
- Parking garage and area lighting
- Street lighting
