升压型DC/DC转换器1.25MHz固定开关频率PWM调光CXSU63168单电池锂离子电池以恒定电流串联驱动5个白色LED
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CXSU63168是一款升压型DC/DC转换器，设计用于从单电池锂离子电池以恒定电流串联驱动多达5个白色LED。因为它直接调节输出电流，所以CXSU63168是驱动发光二极管（LED）的理想选择，发光二极管（LED）的光强度与通过它们的电流成正比，而不是其端子上的电压。单个外部电阻器将LED电流设置在2毫安到20毫安之间，然后可以使用高达100千赫的直流电压或脉冲宽度调制（PWM）信号轻松调整
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产品概述 返回TOP
The CXSU63168 is a step‐up DC/DC converter designed for driving up to 5 white LEDs in series from a single cell Lithium Ion battery with constant current. Because it directly regulates output current, the CXSU63168 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the voltage across their terminals. A single external resistor sets LED current between 2mA and 20mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal up to 100KHz. Its low 104mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over‐voltage condition is present due to an open circuit condition. The CXSU63168 is available in SOT23‐6 packages.
产品特点 返回TOP
z Drives Up to 5 Series White LEDs from 3V
z Up to 87% Efficiency
z 1.25MHz Fixed Switching Frequency
z Low 104mV Feedback Voltage
z Open Load Shutdown
z PWM Dimming
z SOT23‐6 Packages
z RoHS compliant
应用范围 返回TOP
z Cell Phones
z Handheld Computers and PDAs
z Digital Cameras z Small LCD Displays
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| Step-up Converter | ||||||
| Part No. | Input Voltage | Output Voltage | Current MAX | Frequency | Efficiency | Package |
| CXSU63168 | 6V | 20V | 350mA | 1.25MHz | 90% | SOT23-6 |
| CXSU63169 | 6V | 20V/28V/35V | 1A | 1MHz | 90% | SOT23-6 |
| CXSU63170 | 6V | 24V | 2A | 1.5MHz | 90% | SOT23-6 |
| CXSU63171 | 6V | 6V | 2A | 1MHz | 90% | SOT23-6 |
| CXSU63172 | 6V | 20V | 2A | 1.5MHz | 88% | SOT23-5 |
| CXSU63173 | 6V | 20V | 2A | 1.5MHz | 88% | SOT23-6 |
| CXSU63174 | 20V | 30V | 3.5A | 1.2MHz | 95% | DFN-10 |
| CXSU63175 | 6V | --V | --A | 1MHz | 90% | SOP-8/TSSOP-8 |
| CXSU63176 | 6V | 6V | 2A | 1MHz | 95% | SOT23-6 |
| CXSU63177 | 5V | 5V | 2.1A | 1.2MHz | 92% | /DFN-12/QFN-16QFN-16 |
| CXSU63178 | 5V | 5V | 2.1A | 1.2MHz | 92% | ESOP-8 |
| CXSU63179 | 5V | 5V | 6A | 1.2MHz | 92% | ESOP-8 |
