</a>LED" title="LED">LED" title="LED">LED驅動電路圖以及20W LED驅動演示板主要特性和指標,電路圖,材料清單和PCB元件布局圖.
High Efficiency (>90%), High Power Factor (>0.97), Low A-THD (<15%), 20 W Output Non-Isolated Buck LED Driver Using LinkSwitchTMPL LNK460KGHigh Efficiency (>90%), High Power Factor (>0.97), Low A-THD (<15%), 20 W Output Non-Isolated Buck LED Driver Using LinkSwitchTMPL LNK460KG
The LinkSwitch-PL family enables a very small and low cost single-stage power factor corrected constant current driver for solid state lighting. Optimized for direct LED current sensing, the LinkSwitch-PL operates over a wide input voltage range delivering an output power of up to 16 W. The LinkSwitch-PL control algorithm provides flicker-free TRIAC dimming with minimal external components.
Each device incorporates a 725 V rated power MOSFET, a novel discontinuous mode variable frequency variable on-time controller, frequency jitter, cycle by cycle current limit and hysteretic thermal shutdown in a monolithic 4-pin IC, available in SO-8C, eSOP-12, and eDIP-12 packages.
LNK460KG產品亮點:
Dramatically Simplifies Off-line LED Drivers
• Flicker-free phase-controlled TRIAC dimming
• Single stage power factor correction and accurate constant current (CC) output
• Very low component count with small non-electrolytic bulk capacitor for compact replacement lamp designs
• Compact SO8, eSOP, and eDIP packages
• Completely eliminates control loop compensation
Advanced Performance Features
• Optimized for non-isolated flyback designs
• Frequency jitter greatly reduces EMI filter size and costs
• Low dissipation direct sensing of LED current
Advanced Protection and Safety Features
• Cycle skipping regulation for abnormally low output power to clamp peak output current delivered
• 725 V integrated power MOSFET allows small bulk capacitance and maximizes power capability
• Short-circuit, overload, open feedback and output overvoltage protection
• Hysteretic thermal shutdown
• Meets high-voltage creepage between DRAIN and all other pins both on PCB and at package
EcoSmart™ - Energy Efficient
• High power factor optimizes system lumen per input VA
• Control algorithm balances switching and conduction losses over line and load to maintain optimum efficiency
圖1.LNK460KG方框圖
圖2.LNK460KG典型應用電路圖
圖2.替代A19白熾燈5W 15V LED驅動電路圖
20W LED驅動演示板
The document describes a non-isolated, high efficiency, high power factor (PF) LED driver designed to drive a nominal LED string voltage of 85 V at 240 mA from an input voltage range of 195 VAC to 265 VAC (47 Hz – 63 Hz). The LED driver utilizes the LNK460KG from the LinkSwitch-PL family of ICs.
The topology used is a single-stage non-isolated buck that meets the stringent space and efficiency requirements for this design. LinkSwitch-PL based designs provide high power factor (>0.9) meeting international requirements.
This document contains the LED driver specification, schematic, PCB details, bill of materials, transformer documentation and typical performance characteristics.
20W LED驅動演示板主要特性:
? Low cost, low component count (29 parts), small size (height <8 mm), and single-sided PCB
? Single-stage power factor correction and constant current (CC) output
? Highly energy efficient, >90%
? Integrated protection and reliability features
? Output short-circuit protection with auto-recovery
? Auto-recovering thermal shutdown with hysteresis
? No damage during brown-out conditions
? PF >0.97, % ATHD <15% at nominal 230 VAC input
? Easily meets Class C harmonic requirement (>25 W) even with multiple tubes in parallel operation
? Meets 1 kV differential line surge and EN55015 conducted EMI
圖3.20W LED驅動演示板外形圖
20W LED驅動演示板主要指標:
圖4.20W LED驅動演示板電路圖
20W LED驅動演示板材料清單(BOM):
圖5.20W LED驅動演示板元件布局圖
詳情請見:
http://www.powerint.com/sites/default/files/product-docs/linkswitch-pl_family_datasheet.pdf
和
http://www.powerint.com/sites/default/files/PDFFiles/der337.pdf
High Efficiency (>90%), High Power Factor (>0.97), Low A-THD (<15%), 20 W Output Non-Isolated Buck LED Driver Using LinkSwitchTMPL LNK460KGHigh Efficiency (>90%), High Power Factor (>0.97), Low A-THD (<15%), 20 W Output Non-Isolated Buck LED Driver Using LinkSwitchTMPL LNK460KG
The LinkSwitch-PL family enables a very small and low cost single-stage power factor corrected constant current driver for solid state lighting. Optimized for direct LED current sensing, the LinkSwitch-PL operates over a wide input voltage range delivering an output power of up to 16 W. The LinkSwitch-PL control algorithm provides flicker-free TRIAC dimming with minimal external components.
Each device incorporates a 725 V rated power MOSFET, a novel discontinuous mode variable frequency variable on-time controller, frequency jitter, cycle by cycle current limit and hysteretic thermal shutdown in a monolithic 4-pin IC, available in SO-8C, eSOP-12, and eDIP-12 packages.
LNK460KG產品亮點:
Dramatically Simplifies Off-line LED Drivers
• Flicker-free phase-controlled TRIAC dimming
• Single stage power factor correction and accurate constant current (CC) output
• Very low component count with small non-electrolytic bulk capacitor for compact replacement lamp designs
• Compact SO8, eSOP, and eDIP packages
• Completely eliminates control loop compensation
Advanced Performance Features
• Optimized for non-isolated flyback designs
• Frequency jitter greatly reduces EMI filter size and costs
• Low dissipation direct sensing of LED current
Advanced Protection and Safety Features
• Cycle skipping regulation for abnormally low output power to clamp peak output current delivered
• 725 V integrated power MOSFET allows small bulk capacitance and maximizes power capability
• Short-circuit, overload, open feedback and output overvoltage protection
• Hysteretic thermal shutdown
• Meets high-voltage creepage between DRAIN and all other pins both on PCB and at package
EcoSmart™ - Energy Efficient
• High power factor optimizes system lumen per input VA
• Control algorithm balances switching and conduction losses over line and load to maintain optimum efficiency
圖1.LNK460KG方框圖
圖2.LNK460KG典型應用電路圖
圖2.替代A19白熾燈5W 15V LED驅動電路圖
20W LED驅動演示板
The document describes a non-isolated, high efficiency, high power factor (PF) LED driver designed to drive a nominal LED string voltage of 85 V at 240 mA from an input voltage range of 195 VAC to 265 VAC (47 Hz – 63 Hz). The LED driver utilizes the LNK460KG from the LinkSwitch-PL family of ICs.
The topology used is a single-stage non-isolated buck that meets the stringent space and efficiency requirements for this design. LinkSwitch-PL based designs provide high power factor (>0.9) meeting international requirements.
This document contains the LED driver specification, schematic, PCB details, bill of materials, transformer documentation and typical performance characteristics.
20W LED驅動演示板主要特性:
? Low cost, low component count (29 parts), small size (height <8 mm), and single-sided PCB
? Single-stage power factor correction and constant current (CC) output
? Highly energy efficient, >90%
? Integrated protection and reliability features
? Output short-circuit protection with auto-recovery
? Auto-recovering thermal shutdown with hysteresis
? No damage during brown-out conditions
? PF >0.97, % ATHD <15% at nominal 230 VAC input
? Easily meets Class C harmonic requirement (>25 W) even with multiple tubes in parallel operation
? Meets 1 kV differential line surge and EN55015 conducted EMI
圖3.20W LED驅動演示板外形圖
20W LED驅動演示板主要指標:
圖4.20W LED驅動演示板電路圖
20W LED驅動演示板材料清單(BOM):
圖5.20W LED驅動演示板元件布局圖
詳情請見:
http://www.powerint.com/sites/default/files/product-docs/linkswitch-pl_family_datasheet.pdf
和
http://www.powerint.com/sites/default/files/PDFFiles/der337.pdf
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