《電子技術應用》
您所在的位置:首頁 > 電源技術 > 解決方案 > TITPS92070低功率離線LED照明解決方案

TITPS92070低功率離線LED照明解決方案

2011-10-14
作者:TI 公司
</a>LED" title="LED">LED" title="LED">LED照明的先進的PWM控制器" title="PWM控制器">PWM控制器,具有先進的調光接口,提供無損耗調光觸發控制電路。沒有低頻光照度波動,LED電流調整度優于5%,并可編最小LED電流,功率因素大于0.8。TPS92070集成了PWM MOSFET驅動器和熱關斷電路,主要用在LED照明燈,LED燈光源,LED聚光燈和LED投光燈。本文介紹了TPS92070主要特性,功能方框圖,應用框圖以及TPS92070EVM-648評估板主要特性,電路圖和材料清單。

The TPS92070 is an advanced PWM controller ideal for use in low-power, offline, LED lighting applications. The integrated dimming interface circuit of the TPS92070 features a non‐dissipative dimmer trigger control circuit. The TPS92070 controller provides DC LED current with no photometric ripple effects. The DC current also results in higher efficacy of the LEDs. The TPS92070 provides exponentially controlled light output based on the external dimmer position. High power factor is achieved with a valley fill circuit. Once a leading-edge dimmer is detected, the TPS92070 sets an output to disable the PFC circuit and thus optimizes driver operation. The LED current sense precision error amplifier implements deep dimming.

TPS92070主要特性:

Advanced Integrated Dimming Interface

Non-Dissipative TRIAC Dimmer Management

Lamp-to-Lamp Uniformity During Dimming

No Low-Frequency Photometric Ripple

Exponential Dimming Profile

Innovative Secondary-Side Feedback Eliminates Optocoupler Devices

LED Current Regulation better than 5%

Programmable Minimum LED Current

Valley Switching and DCM Operation for Reduced EMI and Improved Efficiency

Leading Edge Dimmer Detection

Power Factor > 0.8

Cycle-by-Cycle Current Limit Protection

Low Start-Up and Standby Currents

Integrated PWM MOSFET Driver

Thermal Shutdown

16-Pin, TSSOP package

TPS92070應用:

LED Light Bulb Replacement

LED Luminaires

LED Downlights

LED Wall Washers

圖1。TPS92070功能方框圖

圖2。TPS92070應用框圖

TPS92070EVM-648評估板

The TPS92070EVM-648 evaluation module (EVM) is a low power isolated flyback converter that provides 5 on-board LEDs with 370 mA of drive current from a nominal 230 VAC input. This EVM is designed to demonstrate the TPS92070 in a typical application where LEDs can be used for general illumination applications that require dimming.

This evaluation module uses the TPS92070 High Efficiency Integrated Dimming LED Lighting Driver Controller (TI Literature Number SLUSAN1) in a low power offline flyback converter to provide 370 mA to the on-board LED load. The input accepts a nominal 50 Hz, 230 VAC input voltage. The TPS92070EVM-648 is designed to be used with a leading edge triac dimmer switch in series with the input voltage to control the lumen output of the LEDs. The integrated dimming interface circuit on the TPS92070 provides exponentially controlled light output based on the external dimmer position.

This user’s guide provides the schematic, component list, assembly drawing, and test set up necessary to evaluate the TPS92070 in an AC input LED lighting application. To use an input voltage greater than 240 VAC, it is recommended the user change the fuse to one rated for at least 300 V at 1 A.

TPS92070EVM-648評估板主要特性:

• 180 VAC to 240 VAC input range

• LED current regulation of 370 mA, nominal

• 6 W output at 16.5 V

• Advanced integrated dimming interface

• Exponential dimming profile

• Programmable minimum LED Current

• Valley switching and DCM operation

• Leading edge dimmer detection

• Valley fill power factor correction

• Cycle by cycle current limit protection

TPS92070EVM-648評估板電性能指標:


圖3。推薦的TPS92070EVM-648評估板測試圖

圖4。TPS92070EVM-648評估板電路圖
TPS92070EVM-648評估板材料清單:
   

詳情請見:
http://www.ti.com/lit/ds/slusan1/slusan1.pdf

http://www.ti.com/lit/ug/sluu523/sluu523.pdf

 



本站內容除特別聲明的原創文章之外,轉載內容只為傳遞更多信息,并不代表本網站贊同其觀點。轉載的所有的文章、圖片、音/視頻文件等資料的版權歸版權所有權人所有。本站采用的非本站原創文章及圖片等內容無法一一聯系確認版權者。如涉及作品內容、版權和其它問題,請及時通過電子郵件或電話通知我們,以便迅速采取適當措施,避免給雙方造成不必要的經濟損失。聯系電話:010-82306118;郵箱:aet@chinaaet.com。
主站蜘蛛池模板: 55窝窝影院纶理电影在线 | 精品欧美一区二区在线看片 | 大尺度影院 | 婷婷六月久久综合丁香76 | 999国内精品永久免费视频试看 | 成人免费视频一区二区 | 五月丁五月丁开行停停乱 | 亚洲精品乱码久久久久久蜜桃欧美 | 五月亭亭六月丁香 | 婷婷爱五月天 | 国产成人在线小视频 | 久久久精品免费热线观看 | 国产精品成人久久久久 | 免费一级在线观看 | 欧美黄视频网站 | 久艹视频在线免费观看 | 国产成人亚洲综合 | 五月婷婷丁香 | 毛片一区二区三区 | 大色综合色综合资源站 | 五月天在线网站 | 五月天激激婷婷大综合丁香 | 男人的天堂在线免费观看 | 五月天婷婷视频在线观看 | 国产色中色 | 国产精品久久久久桃色tv | 久久r精品 | 99久久精品免费精品国产 | 精品久久久久亚洲 | 草天堂| 色婷婷久久合月综 | 日韩在线视频一区 | 国产精品特级毛片一区二区三区 | 国产va免费精品 | 国产男女视频 | 国产成人综合亚洲欧美在 | 久久久这里只有精品免费 | 七月丁香色婷婷综合激情 | 日本欧美小视频 | 久久午夜视频 | 精品国产免费第一区二区 |