</a>LED" title="LED">LED" title="LED">LED驅動器是采用LinkSwitchTM-PL系列的 LNK460KG器件,所用元件數量最少,效率大于87%,功率因素大于0.98,A-THD小于10%,輸出功率20W,可替代T8管燈.本文介紹了LNK460KG主要特性,框圖,典型應用電路,替代A19白熾燈的5W/15V LED驅動器電路圖,以及采用LNK460KG的T8 20W/85V LED驅動器主要特性和技術指標,電路圖,材料清單和PCB布局圖.
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.
LinkSwitch-PL系列產品亮點:
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.LinkSwitch-PL系列框圖
圖2.LinkSwitch-PL系列典型應用電路圖
圖2.采用LNK457DG的5W/15V LED驅動器,替代A19白熾燈
采用LNK460KG的T8 20W/85V LED驅動器(DER-345)
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 235 mA from an input voltage range of 85 VAC to 135 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 boost 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.
T8 20W/85V LED驅動器主要特性:
? Low cost, low component count (parts), small size (height <8 mm)
? PF >0.98, % ATHD <6% at nominal input
? Highly energy efficient, >87% at nominal input
? Single-stage power factor correction and constant current (CC) output
? Integrated protection and reliability features
? Output short-circuit and open load protected
? Auto recovery thermal shutdown with hysteresis
? No damage during brown-out conditions
? Meets 1 kV differential line surge
? IEC 61000-4-5 ring wave, IEC 61000-3-2 C harmonics and EN55015 B conducted EMI compliant
圖3.T8 20W/85V LED驅動器外形圖(180 mm x 16.4 mm x 8 mm).
T8 20W/85V LED驅動器主要指標:
圖4.T8 20W/85V LED驅動器電路圖
T8 20W/85V LED驅動器材料清單:
圖5.T8 20W/85V LED驅動器PCB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/der345.pdf
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.
LinkSwitch-PL系列產品亮點:
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.LinkSwitch-PL系列框圖
圖2.LinkSwitch-PL系列典型應用電路圖
圖2.采用LNK457DG的5W/15V LED驅動器,替代A19白熾燈
采用LNK460KG的T8 20W/85V LED驅動器(DER-345)
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 235 mA from an input voltage range of 85 VAC to 135 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 boost 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.
T8 20W/85V LED驅動器主要特性:
? Low cost, low component count (parts), small size (height <8 mm)
? PF >0.98, % ATHD <6% at nominal input
? Highly energy efficient, >87% at nominal input
? Single-stage power factor correction and constant current (CC) output
? Integrated protection and reliability features
? Output short-circuit and open load protected
? Auto recovery thermal shutdown with hysteresis
? No damage during brown-out conditions
? Meets 1 kV differential line surge
? IEC 61000-4-5 ring wave, IEC 61000-3-2 C harmonics and EN55015 B conducted EMI compliant
圖3.T8 20W/85V LED驅動器外形圖(180 mm x 16.4 mm x 8 mm).
T8 20W/85V LED驅動器主要指標:
圖4.T8 20W/85V LED驅動器電路圖
T8 20W/85V LED驅動器材料清單:
圖5.T8 20W/85V LED驅動器PCB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/der345.pdf
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