美隆電子有限公司

Mayloon Electronic Co., Ltd.,

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Product Change Notification Letter

E-mail 列印

PNC

Product Change Notification Letter

Date: July 01, 2013

PCN #: 130701

To: All Affected Customers

Title: Mayloon Part Numbers – Changing LR12FTER007G to N-MLR12FDR007B

Affected Products: LR12FTER007G

Effective Date: Aug 01, 2013

We appreciate your use of Mayloon products. Our commitment in maintaining and improving processes is demonstrated by plans to enhance our product quality,

reliability and manufacturability. The purpose of this notice is to inform you of a product change.

Description & Purpose:

This update and upgrade relies on good quality and function from "E(100ppm)" to "D(50ppm)" to improve the product of quality.

This change will not affect product’s form, fit, function and reliability.

Reason for Change: Quality/Reliability

The new code of detail to show about an item

BEFORE

New

LR12FTER007G

N-MLR12FDR007B

N = 3W The supplementary one letter to represent it  power

LR = Metal Alloy Low Ohm Res.

MLR = Metal Alloy Low Ohm Res.

12 = 2512

12 = 2512

F = Tolerance 1%

F = Tolerance 1%

T = T/Reel packing

Omitted a word "T"

E = 100PPM

D = 50PPM(update and upgrade relies on good quality and function)

R = Resistance

R = Resistance

G = Green color

B = Black color (changing color from green to black)

Please refer datasheet at http://www.mayloon.com for detail if you need additional information.

最近更新在 週五, 17 二月 2017 09:13  
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Newsflash

標準電源設計中常見的習慣

正确量測LED電源

 

標準電源設計中常見的習慣

在設計LED燈具的過程中,當系統架構工程師是位元電子電力專家,或者若電源設計被承包給一家工程公司時,一些標準電源設計中常見的習慣就會出現在LED驅動器設計中。一些習慣是很有用的,因為LED驅動器在很多方面與傳統的恆壓源非常相似。兩類電路都工作在較寬的輸入電壓範圍和較大的輸出功率下,另外這兩類電路都面對連接到交流電源、直流穩壓電源軌還是電池上等不同連接方式所帶來的挑戰。電力電子工程師習慣於總想確保輸出電壓或電流的高精確度,對LED驅動器而言並不是很好的習慣。。諸如FPGADSP之類的數位負載需要更低的核心電壓,而這又要求更嚴格的控制,以防止出現較高的誤碼率。因此,數位電源軌的公差通常會控制在±1%以內或比它們的標稱值小,也可用其絕對數值表示,如0.99V1.01V。在將傳統電源的設計習慣引入LED驅動器設計領域時,帶來的問題就是:為了實現對輸出電流公差的嚴格控制,將浪費更多的電力並使用更昂貴的元件,或者二者兼而有之。

正確測量LED供電電源

封閉實際光輸出的控制回路

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