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EEPW首頁(yè) > 光電顯示 > 設計應用 > On Semi NCL30100 效率95% LED驅動(dòng)解決方案

On Semi NCL30100 效率95% LED驅動(dòng)解決方案

作者: 時(shí)間:2012-02-29 來(lái)源:網(wǎng)絡(luò ) 收藏
On Semi 公司的是 效率大于95% 的器控制器,開(kāi)關(guān)頻率高達700kHz,不需要輸出電容,VCC工作范圍從6.35 到18 V,可驅動(dòng)一個(gè)或多個(gè)大功率LED,主要用在MR16 LED照明,環(huán)境燈照明,太陽(yáng)能LED,交通照明,室外照名和LED照明棒等。本文介紹了主要特性,方框圖,典型應用電路以及MR16應用電路圖和MR16評估板材料清單,115Vac轉換器設計案例電路圖和相應的材料清單。
?
Fixed Off Time Switched Mode LED Driver Controller

The is a compact switching regulator controller intended for space constrained constant current high?brightness LED driver applications where efficiency and small size are important. The controller is based on a peak current, quasi fixed?off time control architecture optimized for continuous conduction mode step?down (buck) operation. This allows the output filter capacitor to be eliminated. In this configuration, a reverse buck topology is used to control a cost effective N?type MOSFET. Moreover, this controller employs negative current sensing thus minimizing power dissipation in the current sense resistor. The off time is user adjustable through the selection of a small external capacitor, thus allowing the design to be optimized for a given switching frequency range. The control loop is designed to operate up to 700 kHz allowing the designer the flexibility to use a very small inductor for space constrained applications.

The device has been optimized to provide a flexible inductive step?down converter to drive one or more high power LED(s). The controller can also be used to implement non?isolated buck?boost driver topologies.

NCL30100主要特性:

Quasi?Fixed OFF Time, Peak Current Control Method

N?FET Based Controller Architecture

Up to 700 kHz Switching Frequency

Up to >95% Efficiency

No Output Capacitor Needed

VCC Operation from 6.35 ? 18 V

Adjustable Current Limit with Negative Sensing

Inherent Open LED Protected

Very Low Current Consumption at Startup

Undervoltage Lockout

Compact Thin TSOP?6 Pb?Free Package

?40 to + 125C Operating Temperature Range

This is a Pb?Free Device

NCL30100應用:

Low Voltage Halogen LED Replacement (MR 16)

LED Track Lighting

Landscape Lighting

Solar LED Applications

Transportation Lighting

12 V LED Bulb Replacement

Outdoor Area Lighting

LED Light Bars


圖1。NCL30100方框圖

圖2。NCL30100典型LED轉換器應用案例

圖3。NCL30100案例設計電路圖

圖4。NCL30100案例設計PCB外形圖
單層評估板材料清單(NL30100ASLPDGEVB)



圖5。NCL30100 MR16應用電路圖
MR16評估板材料清單(NL30100ADLRMGEVB)


圖6。NCL30100 115Vac轉換器設計案例電路圖

NCL30100 115 Vac材料清單:


詳情請見(jiàn):
http://www.onsemi.cn/pub_link/Collateral/NCL30100-D.PDF

http://www.onsemi.cn/pub_link/Collateral/NL30100ADLRMGEVB_SCHEMATIC.PDF


關(guān)鍵詞: NCL30100 LED驅動(dòng)

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