原标题：PowerIntLYT1403D三种调光10W LED驱动器参考设计DER607

　　PowerInt公司的LYTSwitch-1系列是具有PFC和恒流输出的单级LED驱动器.器件集成了带有可变开态CrM控制器的725V高压MOSFET.功率因素大于0.9,效率大于85%,线路输入电压±3% CC稳压,输入电压90 VAC – 308 VAC,主要用在LED灯和LED灯管.本文介绍了LYTSwitch-1系列产品亮点和框图,采用LYT1603D8 W, 60 V, 135 mA分隔离A19 LED驱动器电路图,以及采用LYTSwitchTM-1 LYT1403D 的10 W三种调光非隔离降压LED驱动器参考设计DER607主要特性和指标,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.

　　LYTSwitch-1系列产品亮点:

　　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.LYTSwitch-1系列框图

　　图2.采用LYT1603D8 W, 60 V, 135 mA分隔离A19 LED驱动器

　　采用LYTSwitchTM-1 LYT1403D的10 W三种调光非隔离降压LED驱动器参考设计DER607

　　This engineering report describes a 50 V, 205 mA LED downlight driver with 3-waydimming functionality. It works off the low line input voltage mains (90 VAC to 132 VAC)and makes use of LYTSwitch-1 to deliver constant current, high efficiency, lowcomponent count and low cost solution in a non-isolated buck topology.

　　LYTSwitch-1 is a family of devices which is ideal for single-stage, high PF, constantcurrent LED bulbs and tubes. The family incorporates a high-voltage power MOSFET with a variable on-time CrM controller in a SO8 package. 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.High efficiency, accurate constant current regulation, 3-way dimming functionality and low component count were the target design goals.

　　This document is composed of the power supply specification, schematic, bill of materials (BOM), printed circuit layout, design spreadsheet, and performance data.

　　参考设计DER607主要特性:

　　Single-stage power factor corrected, PF >0.9

　　Accurate constant current regulation, ±5%

　　Highly energy efficient, 89% at 115 V

　　Low cost and low component count for compact PCB solution

　　3-way dimming capable (Variable resistor, PWM, and 0-10Vdc)

　　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

　　图3.参考设计DER607外形图(正面)

　　图4.参考设计DER607外形图(背面)

　　参考设计DER607主要指标:

　　参考设计DER607材料清单:

　　详情请见:

lytswitch-1_family_datasheet.pdf

der607.pdf