NXP SSL21083高压8W LED驱动解决方案

1、nxp ssl21083高压8w led驱动解决方案公司的ssl2108x系列是高压驱动器,集成了300v(ssl21081和 ssl21082)或多或少(ssl21083和ssl21084),开关接通采纳零开关(zcs),开关关断采纳零或谷底电压开关,输出信号采纳调制,主要用在输入电压100v/120vac和230vac的紧凑型led照明.本文介绍了ssl2108x主要特性和优势,框图, 基本应用框图,ssl21083参考板主要指标,和材料清单.the ssl2108x is a range of high-voltage integrated circuits (ics), intende

2、d to drive led lamps in general lighting applications.the main benefits of the product family are:small printed-circuit board () 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 intern

3、al 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 (pwm) dimming and has many protection features including easy led temperature feedback.ssl2108x主要特性和优势:led driver ic family driving strings of leds from a rectified mains supplyhigh-efficiency switch mode buck driver product family:drivers with integr

6、ated 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

7、switchminimal 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 requiredinte

8、rnal 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 (see figure 4) led driver solution:no schottky diode required

9、due to zcsno dim switch 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应用:ssl2108x products are intended for compact led lighting applications with accurate fixed current output for sing