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The AP1688 is a high performance AC/DC PFC and constant current controller for universal mains LED driver applications. The device is a buck controller which operates as a boundary conduction mode (BCM) to achieve high efficiency and easy EMI.
An open loop algorithm is adopted in the AP1688, which will make the system achieve excellent line and load regulations with high PF for universal mains input.
The AP1688 features fast start-up, low start-up current, low operation current and high efficiency. It also has rich protection features including over voltage, short and open circuit, over current, over temperature protection.
The AP1688 is available in SO-8 package.
Universal Mains LED Lighting
Optimized for Buck Topology
Boundary Conduction Mode (BCM) Operation to Achieve High Efficiency
High Power Factor > 0.9
High Efficiency > 90%
System Current Accuracy: ±5%
Good Line Regulation and Load Regulation
Low Start-up Current
Tight CC Regulation Performance for Universal Input Mains Voltage Range
Eliminates Control Loop Compensation Circuitry
Built-in Acceleration Start
Open-load and Reload Detection
Over Temperature Protection
Over Current Protection
Over Voltage and Short and Open Circuit Protection