CXLE8158是一种高效率的电荷泵白光LED驱动器;该设备驱动四个白光LED,具有恒定的调节电流,以获得均匀的亮度。电源电压范围从2.7伏到5.5伏,是锂离子电池应用的最佳选择。CXLE8158在1x、1.5x和2x电荷泵模式下工作,并根据输入电压自动切换电荷泵模式,以保持高功率效率所需的功率。CXLE8158为每个LED提供高达30毫安的总电流为120毫安,并允许多种方法,例如用于LED调光的CTRL0引脚上的脉宽调制信号。三个控制逻辑管脚允许禁用或启用LED组合。在2x模式下,电源电流仅为2mA,EN引脚允许设备以2mA静态电流进入关机模式。CXLE8158开关频率为1MHz,只需要四个1mF陶瓷电容器和一个电阻器,确保低输入电流纹波和EMI。
 
[ CXLE8158 ]
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产品概述 返回TOP
产品特点 返回TOP
· ±1.5% LED Current Matching
· High Efficiency Up to 90% Over Li-ion Battery Discharge
· Output Current Up to 30mA per LED
· 2.7V to 5.5V Operating Voltage
· Allow to Turn On or Off a Combination of LEDs
· 1x/1.5x/2x Charge Pump Modes
· Low Shutdown Current: 2mA Maximum
· Low Input Ripple and EMI
· Internal Soft-Start Limits Inrush Current
· Short Circuit Current-Limit
· Thermal Shutdown Protection
· Output Over-Voltage Protection
· 3mmx3mm 16-Pin QFN (QFN3X3-16) Package
· Lead Free and Green Devices Available (RoHS Compliant)
应用范围 返回TOP
· Cellular Phone White LED Back Light
· Portable Device · PDA and Handheld Computer
· DSC
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| Lighting and Display Product > White LED Driver | ||||||||||||
| Part_No | Topology | Archi tecture | Input Voltage (V) | Adj. Output Voltage V | No. of LEDs | LED Current (Max) (A) | Switch Current Limit (A) | Current Sense Voltage (typ)(V) | Switching Frequency (kHz) | Dimming Control | Package | |
| min | max | max | ||||||||||
| Boost | CM | 2.7 | 6 | 32 | 8 | 0.03 | 0.9 | 0.25 | 1000 | Analog | SOT23-6 | |
| Boost | VM | 2.5 | 6 | 19 | 4 | 0.03 | 0.4 | 0.25 | 1000 | Analog PWM | SOT23-6 | |
| Boost | CM | 2.7 | 21 | 30 | 8 | 0.6 | 3.5 | 0.5 | 1200 | Analog | DFN3x3-10 | |
| Charge Pump | - | 2.8 | 4.5 | - | 4 | 0.03 | - | - | 1000 | Analog PWM Digital | QFN4x4-16 | |
| Charge Pump | - | 2.8 | 4.5 | - | 6 | 0.03 | - | - | 1000 | Analog PWM Digital | QFN4x4-16 | |
| Charge Pump | - | 2.8 | 4.5 | - | 4 | 0.03 | - | - | 1000 | Analog PWM Digital | QFN3x3-16 | |
| Boost | CM | 2.5 | 6 | 24 | 6 | 0.03 | 1.2 | 0.1 | 1000 | Analog PWM | SOT23-6 | |
| Boost | CM | 2.5 | 6 | 39 | 10 | 0.03 | 0.9 | 0.3 | 1000 | Analog PWM | SOT23-6 | |
| Boost | CM | 2.5 | 6 | 24 | 6 | 0.03 | 1.2 | 0.2 | 1000 | Analog PWM | SOT23-6 | |
| Boost | CM | 2.5 | 6 | 40 | 10 | 0.03 | 1.5 | 0.2 | 600 | Analog PWM | TDFN2x2-6 | |
| Boost | CM | 2.5 | 6 | 24 | 6 | 0.03 | 2 | 0.2 | 1500 | Analog PWM | SOT23-6 | |
| Buck | CM | 3 | 5.5 | - | SOT23-5 | |||||||
| Boost | CM | 6 | 24 | 65 | 17 | 0.18per string | 3.3 | 0.5 | 200 ~ 900 | External PWM Dimming/I2C | TDFN5x5-16 | |
| Boost | CM | 2.7 | 6 | 40 | 10 | 0.03 | 1.5 | 0.2 | 600 | Analog PWM | TDFN2x2-6 | |
◀ 上一篇:CXLE8157高效率的电荷泵白光LED驱动器设备在主显示器中驱动四个白光LED在副显示器中驱动多达两个白光LED恒定的调节电流强度均匀
下一篇▶:串联驱动2到10个白光LED电流相同亮度均匀的1MHz高效率升压转换器CXLE8160低导通电阻低反馈电压降低了功率损耗实现高效率
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