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基于LinkSwitch-PH设计的14W TRIAC调光LED驱动方案
发布时间：2014-12-12 10:26:18 来源：大电流电感厂家 查看： 次
本文介绍了LinkSwitch-PH系列主要特性,功能方框图, TRIAC调光14W 和7W LED驱动器电路图,以及TRIAC调光14W LED驱动器参考设计主要指标,电路图和材料清单(BOM).PowerInt 公司的LinkSwitch-PH系列集成了725V功率MOSFET,连续模式PWM控制器,用于自偏置的高压开关电流源,频率抖动,逐个周期工字电感的电流限制以及大电流电感延迟热关断电路,大大地简化PF大于0.9, TRIAC调光的LED驱动器的设计,主要用在离线LED驱动器.
The LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring PF >0.9, TRIAC dimmer capability and high efficiency. The single-stage PF and constant current controller eliminates passive circuitry required for power factor correction and electrolytic bulk capacitor. The advanced primary-side control techniques used by the LinkSwitch-PH device provide accurate constant current control while eliminating the need for an optocoupler and secondary-side current control circuitry.
LinkSwitch-PH incorporates a 725 V power MOSFET, a continuous-mode PWM controller, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry, all in a monolithic IC.
LinkSwitch-PH系列主要特性:
Dramatically Simplifies Off-line LED Drivers
• Flicker-free phase-controlled TRIAC dimming
• Single stage power factor corrected and accurate constant current (CC) output
• Elimin共模电感ates optocoupler and all secondary current control circuitry
• Eliminates all control loop compensation circuitry
• Simple primary-side PWM dimming interface
• Universal input voltage range
• Enables designs that are electrolytic-free
Accurate and Consistent Performance
• Compensates for transformer inductance tolerances
• Compensates for line input voltage variations
• Frequency jittering greatly reduces EMI filter size and costs
Advanced Protection and Sa电感fety Features
• Auto-restart for short-circuit protection
• Open circuit fault detection mode
• Automatic thermal shutdown restart with hysteresis
• Meets high voltage creepage requirement between DRAIN and all other signal pins both on PCB and at package
EcoSmart® – Energy Efficient
• Low standby power remote ON/OFF feature (<50 mW at 230 VAC)
• No current sense resistors – maximizes efficiency
• High efficiency operation, >85% achievable
Green Package
• Halogen free and ROHS compliant package
LinkSwitch-PH系列应用:
• Off-line LED driver
图1.LinkSwitch-PH系列功能方框图
图2.LinkSwitch-PH系列TRIAC调光14W LED驱动器电路图
图3.LinkSwitch-PH系列TRIAC调光7W LED驱动器电路图
TRIAC调光14W LED驱动器参考设计
Reference Design Report for a High Efficiency (≥85%), High Power Factor (>0.9) TRIAC Dimmable 14 WTYP LED Driver Using LinkSwitch®-PH LNK406EG
参考设计主要特性和指标:
Superior performance and end user experience
TRIAC dimmer compatible (including low cost leading edge type)
No output flicker
>1000:1 dimming range
Clean monotonic start-up – no output blinking
Fast start-up (<300 ms) – no perceptible delay
Consistent dimming performance unit to unit
Highly energy efficient
≥85% at 115 VAC, ≥87% at 230 VAC
Low cost, low component count and small printed circuit board footprint solution
No current sensing required
Frequency jitter for smaller, lower cost EMI filter components
Integrated protection and reliability features
Output open circuit / output short-circuit protected with auto-recovery
Line input overvoltage shutdown extends voltage withstand during line faults.
Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board
No damage during brown-out or brown-in conditions
Meets IEC 61000-4-5 ringwave, IEC 61000-3-2 Class C harmonics and EN55015 B conducted EMI平面变压器厂家 | 平面电感厂家
The LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring PF >0.9, TRIAC dimmer capability and high efficiency. The single-stage PF and constant current controller eliminates passive circuitry required for power factor correction and electrolytic bulk capacitor. The advanced primary-side control techniques used by the LinkSwitch-PH device provide accurate constant current control while eliminating the need for an optocoupler and secondary-side current control circuitry.
LinkSwitch-PH incorporates a 725 V power MOSFET, a continuous-mode PWM controller, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry, all in a monolithic IC.
LinkSwitch-PH系列主要特性:
Dramatically Simplifies Off-line LED Drivers
• Flicker-free phase-controlled TRIAC dimming
• Single stage power factor corrected and accurate constant current (CC) output
• Elimin共模电感ates optocoupler and all secondary current control circuitry
• Eliminates all control loop compensation circuitry
• Simple primary-side PWM dimming interface
• Universal input voltage range
• Enables designs that are electrolytic-free
Accurate and Consistent Performance
• Compensates for transformer inductance tolerances
• Compensates for line input voltage variations
• Frequency jittering greatly reduces EMI filter size and costs
Advanced Protection and Sa电感fety Features
• Auto-restart for short-circuit protection
• Open circuit fault detection mode
• Automatic thermal shutdown restart with hysteresis
• Meets high voltage creepage requirement between DRAIN and all other signal pins both on PCB and at package
EcoSmart® – Energy Efficient
• Low standby power remote ON/OFF feature (<50 mW at 230 VAC)
• No current sense resistors – maximizes efficiency
• High efficiency operation, >85% achievable
Green Package
• Halogen free and ROHS compliant package
LinkSwitch-PH系列应用:
• Off-line LED driver
图1.LinkSwitch-PH系列功能方框图
图2.LinkSwitch-PH系列TRIAC调光14W LED驱动器电路图
图3.LinkSwitch-PH系列TRIAC调光7W LED驱动器电路图
TRIAC调光14W LED驱动器参考设计
Reference Design Report for a High Efficiency (≥85%), High Power Factor (>0.9) TRIAC Dimmable 14 WTYP LED Driver Using LinkSwitch®-PH LNK406EG
参考设计主要特性和指标:
Superior performance and end user experience
TRIAC dimmer compatible (including low cost leading edge type)
No output flicker
>1000:1 dimming range
Clean monotonic start-up – no output blinking
Fast start-up (<300 ms) – no perceptible delay
Consistent dimming performance unit to unit
Highly energy efficient
≥85% at 115 VAC, ≥87% at 230 VAC
Low cost, low component count and small printed circuit board footprint solution
No current sensing required
Frequency jitter for smaller, lower cost EMI filter components
Integrated protection and reliability features
Output open circuit / output short-circuit protected with auto-recovery
Line input overvoltage shutdown extends voltage withstand during line faults.
Auto-recovering thermal shutdown with large hysteresis protects both components and printed circuit board
No damage during brown-out or brown-in conditions
Meets IEC 61000-4-5 ringwave, IEC 61000-3-2 Class C harmonics and EN55015 B conducted EMI平面变压器厂家 | 平面电感厂家
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