linkswitch-pl系列產品亮點:

dramatically simplifies off-line led drivers

51電子網公益庫存:

APA075-FTQ100

AMP2051

AAT7030AU

ATT7030AU

ACT4060SH

AD6901

AD6722ABCZ

AD6650ABCZ

AD6650ABCZ

ADSP-21M09D970

ADV202BBCZ

• 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
powerint公司的t8管20 w/85 v 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.

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