| 滞环电流控制型大功率LED恒流驱动芯片的设计 |
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| 引用本文： | 李林华,赵海臣,胡绍璐,杨发顺,王代强. 滞环电流控制型大功率LED恒流驱动芯片的设计[J]. 贵州科学, 2014, 0(3): 47-51 |
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| 作者姓名： | 李林华 赵海臣 胡绍璐 杨发顺 王代强 |
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| 作者单位： | 贵州大学电子信息学院贵州省微纳电子与软件技术重点实验室,贵阳550025 |
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| 摘 要： | 基于标准CMOS工艺,采用滞环电流控制模式,设计了一款新型大功率LED恒流驱动芯片。在标准CMOS工艺范围内,芯片能够实现良好的恒流驱动功能。结果表明,电源电压从3到5V变化时,输出电流保持良好的一致性,其最大值和最小值之差仅为0.075mA;随着温度的升高,输出电流先增大后减小,在电路工作的整个温度区间内,输出电流仅仅变化0.165mA;在电感为理想电感情况下,当芯片驱动7个LED灯时,效率最高可达97.8%。
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| 关 键 词： | 滞环电流控制 LED 恒流驱动 电源效率 |
Design of High-Power LED Constant Current Driver Chip for Hysteresis Current Controlling |
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| LI Lin-hua,ZHAO Hai-chen,HU Shao-lu,YANG Fa-shun,WANG Dai-qiang. Design of High-Power LED Constant Current Driver Chip for Hysteresis Current Controlling[J]. Guizhou Science, 2014, 0(3): 47-51 |
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| Authors: | LI Lin-hua ZHAO Hai-chen HU Shao-lu YANG Fa-shun WANG Dai-qiang |
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| Affiliation: | ( College of Electronic Information, Guizhou University, Key Laboratory of Micro-Nano Electronics and Software Technology of Guizhou Province, Guiyang , Guizhou 550025, China) |
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| Abstract: | Based on standard CMOS technology, a new-type high-power LED constant current driver chip was designed by using hysteresis current control mode. Within the scope of standard CMOS technology, the chip could achieve good properties of constant current driving. The results showed that the output current kept good consistency that the difference between maximum and minimum values was only 0. 075 mA when voltage of the power supply changed from 3v to 5v. With the increase of temperature, the output current decreased after a short increase, and the circuit output current changed only 0. 165 mA in the whole current working temperature range. When the chip drove seven LED lamps,the efficiency could reach 97.8 % at most in the case of ideal inductance. |
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| Keywords: | hysteresis current control LED constant-current driving power efficiency |
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