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
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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Lighting and Display Product > White LED Driver |
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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 |
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|
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 |
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下一篇▶:CXLE8159电流模式固定频率升压转换器集成N-FET驱动多达6个串联白光LED电流相同亮度均匀低导通电阻和反馈电压降低了功率损耗固定1MHz开关频率
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