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CRD Applications for Stable Circuit Current Control

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CRD (Constant-Current Diode) is used to stabilize and limit current in circuits, ensuring stable current flow even with voltage fluctuations or load resistance changes. Learn how CRD maintains LED brightness despite voltage variations. Discover the benefits of CRD in extending LED lifespan. Specifications and development details of CRD products also provided.

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CRD Applications for Stable Circuit Current Control

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  1. +Anode - Cathode Introduction CRD(定電流二極體)使用於穩定和限定電流,是一個能為電路提供持續穩 定電流的元件,即使出現電源电壓不穩定或是負載電阻變化很大的情况, 都能確保電路電流穩定. CRD 電路符號 & I-V

  2. I I Vin=12v Vin=12v 6mA CRD +3V- +3V- 1kΩ +3V- +3V- CRD Application Vin=12V, I=(12-6)/1000=6mA If Vin14V, I=(14-6)/1000=8mA(LED變亮) If Vin10V, I=(10-6)/1000=4mA(LED變暗) 電壓或LED VF變化將影響迴路電流及LED亮度. 使用電阻為限流很容易因電壓不穩定而燒毀LED. Vin=12V, I=6mA If Vin14V, I=6mA If Vin10V, I=6mA 電壓變化不影響迴路電流及LED亮度. 使用CRD可穩定電路的電流,避免電壓不穩或突波導致LED燒毀,延長LED壽命.

  3. I 6mA CRD x 3 Vin=12v +3V- +3V- CRD Application I= 6mA x 3 = 18mA CRD並聯使用可得到較高及穩定的電流.

  4. Specification of CRD product

  5. CRD product develop Chip size: 390 x 390 um ( Including scribe lane ). Chip thickness: 150 um. Anode Electrode (bonding pad): Aluminum alloy. Cathode Electrode ( chip backside): Ti/Au. Sample schedule is around October.

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