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引用次数: 2
摘要
本文提出了一种基于电流反射镜的多通道LED驱动芯片。驱动程序可以通过脉冲宽度调制(PWM)改变LED亮度。该芯片构建了一个四阶温度传感器，用于芯片保护。该芯片采用台积电0.25 μ m CMOS高压混合信号实现。该芯片采用60V功率MOS双通道LED驱动器，可驱动120W LED串，用于智能路灯照明。芯片核心约占1215um × 900um的硅面积。驱动效率可达近90%。
Multi-channel LED Driver with PWM Dimming and Temperature Self-Protection
In this paper, we propose a novel LED driver chip for multi-channels based on current mirrors. The driver can change the LED brightness with a pulse width modulation (PWM). The chip built a four-order temperature sensor for chip protection. The chip is implemented with TSMC 0.25 UM CMOS HIGH VOLTAGE MIXED SIGNAL BASED. Using 60V power MOS for two channels LED driver, this chip can drive 120W LED string for smart street lighting. The chip core occupied about 1215um x 900um silicon area. The driving efficiency can achieve up to near 90%.
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