Microchip Technology Controladores LED lineales secuenciales CL880x
Los controladores LED lineales secuenciales CL880x deMicrochip están diseñados para controlar bandas largas de LED de baja corriente y bajo coste en repuestos en estado sólido para tubos fluorescentes, bombillas incandescentes y bombillas CFL. Los dos CI minimizan la cantidad de componentes del circuito del controlador, por lo que únicamente se necesitan cuatro o seis resistencias y un puente de diodos, además del CI. De dos a cuatro componentes complementarios en el circuito ofrecen protección contra transitorios y no hacen falta condensadores ni componentes magnéticos. Dado que los CI son reguladores de corriente lineal multietapa, no hay corrientes de conmutación de alta frecuencia y, por lo tanto, no hay necesidad de filtros EMI frontales. El CL8800 está diseñado para entradas de 230 VAC, mientras que el CL8801 es para entradas de 120 VAC. Se pueden conseguir rendimientos lumínicos de más de 115 lm/W con ambos controladores LED lineales secuenciales CL880X de Microchip .
CL8800 has six current regulator outputs and CL8801 has four. These outputs tap a string of series/parallel LEDs, and the regulators sink current at each tap and are sequentially turned on and off automatically, tracking the input sine wave voltage. The voltage across each regulator is minimized when conducting, providing typical efficiency of greater than 90%. The output current at each tap is individually resistor-adjustable. Cross regulation provides smooth transitions as the IC switches from one regulator to another. The current waveforms of both ICs can be tailored to optimize for input voltage range, line/load regulation, output power/current, efficiency, power factor, THD, dimmer compatibility, and LED utilization. Both ICs are compatible with phase dimming with the addition of an RC network.
CL8800 and CL8801 deliver easy retrofit solutions for designers looking to replace existing fluorescent tubes or incandescent bulbs with more energy-efficient solid-state lighting fixtures. The minimal component count required for both devices, as well as their efficient operation, make them an extremely attractive solution in terms of cost and performance. CL8800 and CL8801 are available in 40-lead QFN packages and are RoHS compliant.
Características
- Minimal component count
- No magnetics, no capacitors
- Low conducted EMI w/o filters
- 80-90% LED utilization
- Phase dimmer compatible with RC network
Especificaciones
- Up to 13W output
- Typical electrical efficiency: 85-90%
- >115Lm/W using efficient LEDs
- >0.9 power factor
- <10% THD line current (CL8800) or<30% THD line current (CL8801)
Aplicaciones
- Fluorescent tube retrofit
- Incandescent and CFL bulb replacement
- General LED lighting