CXLE8159是一个电流模式和固定频率升压转换器，集成N-FET驱动多达6个串联白光LED。串联允许LED电流相同，亮度均匀。它的低导通电阻和反馈电压降低了功率损耗，实现了高效率。快速的1MHz电流模式的脉宽调制操作可用于输入和输出电容器和一个小电感，同时最小化输入电源上的纹波。OVP引脚监测输出电压，如果超过过电压阈值，则停止切换。内部软启动电路消除启动过程中的浪涌电流。CXLE8159还集成了欠压锁定、过温保护和电流限制电路。
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[ CXLE8159 ]
目录
7.相关产品
产品概述 返回TOP
The CXLE8159 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 6 white LEDs in series.The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of NFET and feedback voltage reduces power loss and achieves high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An internal soft-start circuit eliminates the inrush current during start-up. The CXLE8159 also integrates under-voltage lockout, over-temperature protection and current limit circuits. The CXLE8159 is available in SOT-23-6 and TSOT-23-6 packages
产品特点 返回TOP
· Wide Input Voltage from 2.5V to 6V
· 104mV Reference Voltage
· Fixed 1MHz Switching Frequency
· High Efficiency up to 88%
· 100Hz to 100kHz PWM Brightness Control Frequency
· Open-LED Protection
· Under-Voltage Lockout Protection
· Over-Temperature Protection
·<1mA Quiescent Current During Shutdown
· SOT-23-6 and TSOT-23-6 Packages
· Lead Free and Green Devices Available (RoHS Compliant)
应用范围 返回TOP
· White LED Display Backlighting
· Cell Phone and Smart Phone
· PDA, PMP, and MP3
· Digital Camera
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 |
|||||||
|
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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◀ 上一篇: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
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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