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[原创] PowerIntLYT1402-160432W LED驱动器参考设计DER-556

关键词:电源管理 AC/DC转换器 LED驱动器

时间:2017-03-27 09:10:53       作者:Power       来源:中电网

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

图1.LYT1402-1604功能框图

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.

图3.32W LED驱动器参考设计DER-556外形图

图4.32W LED驱动器参考设计DER-556外形图(顶视图)

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:

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:

图7.32W LED驱动器参考设计DER-556 PCB设计图(顶视图)

图8.32W LED驱动器参考设计DER-556 PCB设计图(底视图)

详情请见:

https://led-driver.power.com/products/lytswitch-family/lytswitch-1/?AdSource=PRen_LYT1

https://led-driver.power.com/design-support/reference-designs/design-examples/der-556-32-w-non-dimmable-non-isolated/

der556.pdf

lytswitch-1_family_datasheet.pdf

 

 

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