A next-generation sequential linear LED driver for offline lighting applications is now available from Microchip. The CL88020, an extension of Microchip’s popular CL88XX family, is designed to drive a long string of low-cost LEDs directly from the 120 VAC line input. The product allows customers to create reliable, cost-effective and compact LED lighting applications by having High Power Factor (PF) without the need for switch-mode power conversion which is typically required for LED lighting design.
The CL88020 was designed to minimize driver circuit component count to allow for a very small and efficient design. The simple design allows for a single-layered PCB design. Unlike the conventional AC-DC switch mode power supply, the basic driver circuit consists of the CL88020 IC, two small ceramic capacitors and a bridge rectifier only. High-voltage capacitors, transformer or inductors, EMI filters or PFC circuitry are not required. This allows for a smaller solution size and a lower overall bill of material cost as compared to traditional LED solutions (more info).