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基于LYT1402-1604 32W LED驱动器参考设计

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发表于 2017-4-27 11:09:51 | 显示全部楼层 |阅读模式
Power Integrations公司的LYT1402-1604是LYTSwitch-1系列产品,集成了高压MOSFET和临界导通模式(CrM)控制器,功率因素大于0.9,效率大于93%,725V MOSFET增加了抗线路电压浪涌特性,具有低EMI和设计灵活性,最高可靠性,输入电压90 VAC – 308 VAC,主要用在单级高PF和恒流LED灯和LED管灯.本文介绍了LYT1402-1604产品亮点,框图,8W LED驱动器电路图以及32W非调光非隔离降压LED驱动器参考设计DER-556主要特性,电路图,材料清单和PCB设计图.

The LYTSwitch™-1 family is ideal for single-stage, high PF, constant current LED bulbs and tubes. 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 devices can be used in high-side or low-side non-isolated buck topology.

The CrM operation results in low turn-on losses and reduces cost of output diode (slower reverse recovery). LYTSwitch-1 devices are suitable for applications from 2 W to 22 W. See Table 1 for selection guidance.

LYT1402-1604产品亮点:

Single-Stage PFC + Accurate CC Output
±3% CC regulation in single line input voltage applications
Power factor >0.9
High efficiency >93%
Robust 725 V MOSFET for increased line voltage surge performance
Critical Conduction Mode (CrM) buck
Low EMI
Excellent line noise and transient rejection
Design Flexibility
Supports high- and low-side buck topologies
Wide input (90 VAC – 308 VAC) and output voltage range operation
3 family members cover power range for optimum device selection
Requires no inductor bias winding
Highest Reliability
Lowest component count
Comprehensive protection features with auto-restart Input and output overvoltage protection (OVP)
Output short-circuit protection
Open-loop protection
Advanced thermal control Thermal foldback ensures that light continues to be delivered at elevated temperatures
Over-temperature shutdown provides protection during fault conditions
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图1.LYT1402-1604功能框图
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图2.LYT1402-1604 8W LED驱动器电路图

32W非调光非隔离降压LED驱动器参考设计DER-556

32WLED驱动器参考设计DER-556主要特性:


• Single-stage power factor corrected, PF >0.9
• Accurate constant current regulation for both output, ±5%
• Meets <30% flicker requirement for each output
• Highly energy efficient, >90% at 115 V
• Low cost and low component count for compact PCB solution
• Integrated protection features
• No-load output protection
• Output short-circuit protection
• Overcurrent protection
• Thermal fold-back protection
• Over temperature protection
• No damage during line brown-out or brown-in conditions
• Meets IEC 2.5 kV ring wave, 1 kV differential surge
• Meets EN55015 conducted EMI
This engineering report describes a low component count, non-isolated, non-dimmable LED driver in buck topology, designed to drive a dual output 60 V LED voltage string at 260 mA output current each from an input voltage range of 90 VAC to 132 VAC. The LED drivers utilize the LYT1604D from the LYTSwitch-1 family of devices.
DER-556 offers a compact size solution for 32 W LED drivers for bulb applications. The key design goals were high efficiency, accurate constant current regulation for both outputs and low component count.
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图3.32W LED驱动器参考设计DER-556外形图
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图4.32W LED驱动器参考设计DER-556外形图(顶视图)
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图5.32W LED驱动器参考设计DER-556外形图(底视图)

32W LED驱动器参考设计DER-556主要指标:
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图6.32W LED驱动器参考设计DER-556电路图
32W LED驱动器参考设计DER-556材料清单:
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图7.32W LED驱动器参考设计DER-556 PCB设计图(顶视图)
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图8.32W LED驱动器参考设计DER-556 PCB设计图(底视图)
详情请见:
der556.pdf (2.89 MB, 下载次数: 1)
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