CXLE8157是一种高效率的电荷泵白光LED驱动器；该设备在主显示器中驱动多达四个白光LED，在副显示器中驱动多达两个白光LED，具有恒定的调节电流，强度均匀。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。CXLE8157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。CXLE8157为每个LED提供高达30毫安的电流，并允许多种方法，如ENM引脚上用于主显示器调光的脉冲宽度调制信号和ENS引脚上用于副显示器调光的脉冲宽度调制信号。两个控制逻辑管脚ENM和ENS允许禁用或启用主显示器和子显示器。在2x模式下，电源电流仅为2mA，ENM和ENS保持低电流20毫秒将允许设备以2mA静态电流进入关机模式。CXLE8157具有电流限制和短路保护功能。CXLE8157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
[ CXLE8157 ]
产品技术资料帮助
查看全部>
7.相关产品
产品概述 返回TOP
产品特点 返回TOP
· ±1.5% LED Current Matching
· Powers Main and Sub-Display LEDs
· High Efficiency Up to 90% Over Li-ion Battery Discharge
· Output Current Up to 30mA per LED
· 2.7V to 5.5V Operating Voltage
· 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
· 16-pin QFN 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, Handheld Computer
· DSC
技术规格书（产品PDF) 返回TOP
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！
产品封装图 返回TOP
电路原理图 返回TOP
|
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:CXLE8156高效率的电荷泵白光LED驱动器设备驱动多达四个白光LED恒定的调节电流以获得均匀的亮度低输入纹波和电磁干扰软启动限制浪涌电流
下一篇▶:CXLE8158高效率的电荷泵白光LED驱动器设备驱动四个白光LED恒定的调节电流均匀亮度锂离子电池放电效率90%每个LED输出电流30mA
|
|||||||||||||||||
