NXP SSL21081 LED驅(qū)動(dòng)器參考設(shè)計(jì)

1、nxp ssl21081 led驅(qū)動(dòng)器參考設(shè)計(jì)公司的ssl2108x系列是用于通用照明的高壓驅(qū)動(dòng)器,效率高達(dá)95%,具有低成本的材料清單(bom)和小的占位面積,簡(jiǎn)單實(shí)現(xiàn)緊湊的解決計(jì)劃. ssl2108x系列集成了欠壓鎖住(uvlo),前沿消隱(leb),過(guò)流庇護(hù)(ocp),繞組短路庇護(hù)(swp)和內(nèi)部超溫庇護(hù)(otp).本文介紹了ssl2108x主要特性和優(yōu)勢(shì),方框圖,幾種應(yīng)用以及ssl21081 led驅(qū)動(dòng)器參考板主要特性,和材料清單.the ssl2108x is a range of high-voltage integrated circuits (ics), intended to

2、 drive led lamps in general lighting applications.the main benefits of the product family are:small printed-circuit board (pcb) footprint, and compact solutionhigh efficiency (up to 95 %)ease of integrationlow electronic bill of material (bom)the product family is made of ics with a range of interna

3、l hv switches for easy power scaling.the ics work as boundary conduction mode converters, typically in buck configuration. the ic range has been designed to start up directly from the hv supply by an internal high-voltage current source. thereafter, the dv/dt supply is used with capacitive coupling

4、from the drain, or any other auxiliary supply. this functionality provides full flexibility in the application design. the ic consumes 1.3 ma of supply current with an internal clamp limiting the supply voltage.the ics provide accurate output current control with led current accuracy within 5%. the

5、ics can be operated using pulse-width modulation () dimming and has many protection features including easy led temperature feedback.ssl2108x主要特性和優(yōu)勢(shì):led driver ic family driving strings of leds from a rectified mains supplyhigh-efficiency switch mode buck driver product family:drivers with integrate

6、d 300 v (ssl21081 and ssl21082) or 600 v (ssl21083 and ssl21084) power switchescontroller with power-efficient boundary conduction mode of operation with:no reverse recovery losses in freewheel diodezero current switching (zcs) for turn-on of switchzero voltage or valley switching for turn-on of swi

7、tchminimal required inductance value and sizedirect pwm dimming possiblefast transient response through cycle-by-cycle current control:negligible ac mains ripple at led current and minimal total capacitor valueno over or undershoots in the led currentno binning on led forward voltage requiredinterna

8、l protections:undervoltage lockout (uvlo)leading-edge blanking (leb)overcurrent protection (ocp)short-winding protection (swp)internal overtemperature protection (otp)brownout protectionoutput short protection (osp)low component count led driver solution:no schottky diode required due to zcsno dim s

9、witch and high-side driver required for pwm dimmingeasy external temperature protection with a single ntc resistoroption for soft-start functioncompatible with wall switches with built-in indication light during standby1ic lifetime easily matches or surpasses led lamp lifetimessl2108x應(yīng)用:ssl2108x products are intended for compact led lighting applications with accurate fixed current output for singl