[原创] PowerIntLYT7503－750440W LED驱动器参考设计DER－570

摘要:Power Integrations公司的LYT7503-7504是LYTSwitch™-7系列产品,是切相调光单级LED驱动器,具有PFC和恒流输出,并集成了高压MOSFET和可变开态临界导通模式(CrM)控制器,功率因素大于0.9,效率大于85%,725V MOSFET增加了抗线路电压浪涌特性,具有低EMI,主要用在LED照明如吸顶灯等.本文介绍了LYT7503-7504产品亮点,框图,7.5W LED驱动器电路图以及40W大范围调光非隔离降压LED驱动器参考设计DER-570主要特性,电路图,材料清单和PCB设计图.

The LYTSwitch™-7 family is ideal for single-stage, high PF, constant current LED dimmable applications.

The family incorporates a high-voltage MOSFET with a variable on-time CrM controller. Extensive protection features with minimum external components provide industry leading power density and functionality.

The CrM operation results in low turn-on losses and reduces cost of output diode (slower reverse-recovery type can be used).

LYTSwitch-7 devices are suitable for applications from 4 W to 22 W. For more information, see Application section. LYTSwitch-7 peak current mode operation is suitable for TRIAC applications without the need for an active bleeder.

LYT7503-7504产品亮点:

Single-Stage PFC + Accurate CC Output

±3% CC regulation in single line input voltage applications

Power factor >0.9

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