CXAC85183是一个升压型DC/DC转换器，专门设计用于驱动带有恒流。该设备可以从锂离子电池中串联驱动两个、三个、四个或五个LED。LED的串联提供相同的LED电流，从而产生均匀的亮度和不需要镇流器电阻器。CXAC85183以1MHz的频率切换，允许使用微小的外部组件。输出电容可小到1μF，节省空间和成本与其他解决方案相比。低95mV反馈电压使电流设置中的功率损耗最小化提高效率的电阻器。
固有匹配LED电流。
高效：85%典型。
从3.0V电源最多驱动四个LED。
从3.6V电源最多驱动六个LED。
快速1MHz开关频率。
使用1毫米高的微型感应器。
只需要1μF的输出电容。
低调的SOT-23-5L包装。
100%无铅。
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[ CXAC85183 ]
目录
7.相关产品
产品概述 返回TOP
The CXAC85183 is a step-up DC/DC converter specifically designed to drive white LEDs with a
constant current. The device can drive two, three,four, or five LEDs in series from a Li-Ion cell.
Series connection of the LEDs provides identical LED current resulting in uniform brightness and
eliminating the need for ballast resistors. The CXAC85183 switches at 1MHz, allowing the use of any
tiny external components. The output capacitor can be as small as 1μF, saving space and cost
versus alternative solutions. A low 95mV feedback voltage minimizes power loss in the current setting resistor for better efficiency.
CXAC85183 is available in low profile SOT-23-5L package.
产品特点 返回TOP
Inherently Matched LED Current.
High Efficiency: 85% Typical.
Drives Up to Four LEDs from a 3.0V Supply.
Drives Up to Six LEDs from a 3.6V Supply.
Fast 1MHz Switching Frequency.
Uses Tiny 1mm Tall Inductors.
Requires Only 1μF Output Capacitor.
Low Profile SOT-23-5L Packaging.
100% Lead (Pb)-Free.
应用范围 返回TOP
Cellular Phones
PDAs, Handheld Computuers
Digital Camera
MP3 Players
GPS Receivers
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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AC/DC PWM Controller |
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|
Product |
Status |
Device Description |
VIN(min~max) |
VOUT |
IOUT |
IQ(typ) |
Vfb |
Frequency |
Pkg |
|
Active |
1.9A固定频率白光驱动 |
2.5~5V |
3-27v |
1.9A |
170uA |
0.3V |
1.2MHZ |
SOT23-6 |
|
|
NRFED |
1A白光驱动 |
2.7~4.5V |
ADJ |
2.5A |
100uA |
0.1V |
1MHZ |
SOT23-6 |
|
|
NRFED |
450uA |
60KHZ |
420mA |
TO92 |
|||||
|
NRFED |
700uA |
40KHZ |
420mA |
SOT23-6 SOP8 |
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