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18V，內建 15V 稽納二極體保護 <br /> VDD腳可做 PWM 調變，最高頻率 5KHz <br /> 可串接使用，提高導通角度與光效 <br /> 電流精準度 4% <br /> 電源及負載調變率 0.5%/V <br /> 120℃~160℃晶片溫度保護，電流隨溫度升高而下降 <br /> 工作環境溫度 -40℃~85℃ <br /> 無鉛環保封裝 80mA單通道定電流驅動器<br /> ˙ 最高輸出端耐壓400V<br /> ˙ 6V~18V 電源電壓設計，內建15V稽納二極體保護<br /> ˙ VDD可做PWM調變,最高頻率 5KHz<br /> ˙ 電源及負載調變率0.5%V.<br /> ˙ 120 ℃~160℃晶片溫度保護80mA單通道定電流驅動器<br /> <br /> <br /> <br /> NU507 是一簡單的高壓定電流元件，在各種 LED 照<br /> 明產品的應用上非常容易使用，尤其是在車用電子與交<br /> 流電壓直接驅動的應用，具有低成本與高效能的優勢。<br /> NU507 其具有絕佳的負載與電源調變率和極小輸出電流<br /> 誤差，能使 LED 的工作電流穩定限制在設定範圍內，大<br /> 幅增長 LED 使用壽命。 <br /> 除了支援寬廣電源範圍不需另外提供電源之外，<br /> NU507 的 VDD腳可以充當輸出致能(OE)功能使用，配合數<br /> 位 PWM 控制線路，可應用於灰階電流控制。 <br /> NU507 支援數能科技獨特的 LED 串接驅動技術，在<br /> 不需要轉換電源電壓的情況下，直接有效率的驅動多顆<br /> 串接的 LED。此串接驅動技術能維持正弦波的高導通角度<br /> 與高電源效率。當電源電壓上升時，能將增加的電壓電<br /> 能轉換為光能。同時並具有高功率因數與電路結構簡單<br /> 的優點。在僅需要少數 SMD 電阻電容的情況下，大幅提<br /> 高產品的可靠度與簡化量產程序。此獨特多階串接驅動<br /> 架構專利申請中。 <br /> NU507 是高壓線性電源元件，不會產生電磁干擾，其<br /> 內建的溫度保護功能，在 125℃以上時會開始將輸出電流<br /> 降低，並在約 160℃時關閉。另外其輸出電流由外部電阻<br /> 設定，最大電流可輸出 80mA。<br /> <br /> <img src="data/attachment/forum/201411/28/1708006x67u6c3wiucqtcr.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/1708483dn4s6qg3s43344c.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/170856kokiq1ec9eztvkcc.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/170907n4se2ye2onj33e9e.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/170951dru9996onr9himx2.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/170951t02kzq7mo2tt7qqj.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/17095444110insar0rcai1.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/170950zone5lc5rv55mmus.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/171036u3tfcfld4f5xy8t5.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/171033zf5c08vch64nkzl0.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/171032s6610qdsv09gqs4s.jpg" onload="javascript:if(this.width>600)this.width=600;"><img src="data/attachment/forum/201411/28/171016lzwvhmlbmq77g4h9.jpg" onload="javascript:if(this.width>600)this.width=600;"><br /> <br /> <font size="2"><font color="gray"> <img id="aimg_AIIso" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" src="http://bbs.oecr.com/xwb/images/bgimg/icon_logo.png" onmouseover="img_onmouseoverfunc(this)" onload="thumbImg(this)" border="0" alt="" /> 该贴已经同步到 <a href="http://api.t.sina.com.cn/1874519880/statuses/3781930170754698" target="_blank">vmxnl的微博</a></font></font></div> <div class="postmsg"></div> <div class="postmsg"></div> 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