TI TPS92070低功耗离线LED照明解决方案.pdf

《TI TPS92070低功耗离线LED照明解决方案.pdf》由会员分享，可在线阅读，更多相关《TI TPS92070低功耗离线LED照明解决方案.pdf（5页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、.TI TPS92070TI TPS92070 低功耗离线低功耗离线 LEDLED 照明解决方案照明解决方案TI 公司的 TPS92070 是用在低功耗离线LED 照明的高档 PWM 控制器,集成的调光接口具有非消耗调光触发控制电路.LED电流调整优于5%,可编程最低LED 电流,谷底开关和DCM 操作降低 EMI 和提高了效率,功率因素大于 0.8,逐个周期的限流保护,主要用在 LED 灯,LED 光源,LED聚光灯和 LED 投光灯.本文介绍了 TPS92070 主要特性,方框图, 应用电路图以及230VAC 输入TPS92070EVM-648 调光 LED 照明驱动器主要指标,电路图和材

2、料清单.The TPS92070 is an advanced PWM controller ideal for use in low-power, offline, LED lightingapplications. The integrated dimming interface circuit of the TPS92070 features a nondissipativedimmer trigger control circuit. The TPS92070 controller provides DC LED current with nophotometric ripple ef

3、fects. The DC current also results in higher efficacy of the LEDs. The TPS92070provides exponentially controlled light output based on the external dimmer position. High powerfactor is achieved with a valley fill circuit. Once a leading-edge dimmer is detected, the TPS92070sets an output to disable

4、the PFC circuit and thus optimizes driver operation. The LED current senseprecision error amplifier implements deep dimming.TPS92070 主要特性:Advanced Integrated Dimming InterfaceNon-Dissipative TRIAC Dimmer ManagementLamp-to-Lamp Uniformity During DimmingNo Low-Frequency Photometric RippleExponential D

5、imming ProfileInnovative Secondary-Side Feedback Eliminates Optocoupler DevicesLED Current Regulation better than 5%Programmable Minimum LED CurrentValley Switching and DCM Operation for Reduced EMI and Improved EfficiencyLeading Edge Dimmer DetectionPower Factor 0.8Cycle-by-Cycle Current Limit Prot

6、ectionLow Start-Up and Standby CurrentsIntegrated PWM MOSFET DriverThermal Shutdown16-Pin, TSSOP packageTPS92070 应用:LED Light Bulb ReplacementLED LuminairesLED DownlightsLED Wall Washers.v.图 1.TPS92070 方框图图 2.TPS92070 应用电路图 230VAC 输入 TPS92070EVM-648调光 LED 照明驱动器TPS92070EVM-648 Integrated Dimming LED

7、Lighting Driver Converter for 230 VAC InputThe.v.TPS92070EVM-648 evaluation module (EVM) is a low power isolated flyback converter thatprovides 5 on-board LEDs with 370 mA of drive current from a nominal 230 VAC input. This EVM isdesigned to demonstrate the TPS92070 in a typical application where LE

8、Ds can be used for generalillumination applications that require dimming.This evaluation module uses the TPS92070 High Efficiency Integrated Dimming LED Lighting DriverController in a low power offline flyback converter to provide 370 mA to the on-board LED load. Theinput accepts a nominal 50 Hz, 23

9、0 VAC input voltage. The TPS92070EVM-648 is designed to beused with a leading edge triac dimmer switch in series with the input voltage to control the lumenoutput of the LEDs. The integrated dimming interface circuit on the TPS92070 providesexponentially controlled light output based on the external

10、 dimmer position.This users guide provides the schematic, ponent list, assembly drawing, and test set up necessaryto evaluate the TPS92070 in an AC input LED lighting application. To use an input voltage greaterthan 240 VAC, it is remended the user change the fuse to one rated for at least 300 V at

11、1 A.TPS92070EVM-648 调光 LED 照明驱动器主要特性:The TPS92070EVM-648 features include: 180 VAC to 240 VAC input range LED current regulationof 370 mA, nominal 6 W output at 16.5 V Advanced integrated dimming interface Exponentialdimming profile Programmable minimum LED Current Valley switching and DCM operation

12、Leading edge dimmer detection Valley fill power factor correction Cycle by cycle current limitprotectionTPS92070EVM-648 调光 LED 照明驱动器应用:The TPS92070 is suited for use in low power lighting applications such as: LED light bulbreplacement LED luminaires LED down-lights LED wall washersTPS92070EVM-648 调光 LED 照明驱动器主要指标:.v.图 3.TPS92070EVM-648 调光 LED 照明驱动器电路图TPS92070EVM-648 调光 LED 照明驱动器材料清单:.v.图 4.TPS92070EVM-648 调光 LED 照明驱动器外形图c:iknowdocsharedatacur_work.aoelectronicsc:iknowdocsharedatacur_work.aoelectronicsmain.phpc:iknowdocsharedatacur_work.aoelectronicsc:iknowdocsharedatacur_work.aoelectronics.v