CXLE8868稳压器是固定频率的PWM升压（升压）LED恒流驱动器，能够驱动1W/3W/5W系列LED单元，具有出色的线路和负载调节能力。该调节器使用简单，因为它包括内部频率补偿和固定频率振荡器，因此它需要最少数量的外部组件才能工作。CXLE8868可以直接驱动11系列1W LED单元（在车辆识别号>12V时）。
该PWM控制电路能够将占空比从0%线性调整到95%。一个使能功能，一个过电流保护功能内置。内置一个内部补偿块以最小化外部组件计数。
n宽3.6V至32V输入电压范围
n 0.22V FB可调LED驱动电流
n直接驱动11系列1W LED（车辆识别号>=12V）
n固定180KHz开关频率
n最大4A开关电流能力
n效率高达94%
n优良的线路和负载调节
n EN PIN TTL关断能力&具有PWM调光功能
n内部优化功率MOSFET
n内置软启动功能
n内置频率补偿
n内置热关机功能
n内置电流限制函数
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[ CXLE8868 ]
目录
产品概述 返回TOP
The CXLE8868 regulator is fixed frequency PWM Boost (step-up) LED constant current driver, capable of driving Series 1W/3W/5W LED units with excellent line and load regulation. The regulator is simple to use because it includes internal frequency compensation and a fixed-frequency oscillator so that it requires a minimum number of external components to work. The CXLE8868 could directly drive 11 Series 1W LED units at VIN>12V .
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 95%. An enable function, an over current protection function is built inside. An internal compensation block is built in to minimize external component count.
产品特点 返回TOP
n Wide 3.6V to 32V Input Voltage Range
n 0.22V FB adjustable LED drive current
n Directly drive 11 Series 1W LED at VIN>=12V
n Fixed 180KHz Switching Frequency
n Max. 4A Switching Current Capability
n Up to 94% efficiency
n Excellent line and load regulation
n EN PIN TTL shutdown capability & With PWM Dimming Function
n Internal Optimize Power MOSFET
n Built in Soft-Start Function
n Built in Frequency Compensation
n Built in Thermal Shutdown Function
n Built in Current Limit Function
n Available in TO252-5L package
应用范围 返回TOP
n LED Lighting
n Boost constant current driver
n Monitor LED Backlighting
n 7’ to 15’ LCD Panels
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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型号 |
工作电压范围 |
输出电流 |
输出电流精度 |
工作频率 |
调光功能 |
封装 |
|
|
0.9V-6.0V |
1A |
- |
90% |
1.0 MHz |
SOT-26 |
||
|
0.8V-5.5V |
外置MOS/15W |
3% |
90% |
700KHz |
PWM调光500Hz-1KHz |
SOT-26 |
|
|
3V-24V |
内置2A MOS |
2% |
90% |
1.2MHz |
SOT-26 |
||
|
2.7V-6.5V |
内置2.8A MOS |
2% |
90% |
1MHz |
SOT-26 |
||
|
2.5V-30V |
内置3A MOS |
2% |
90% |
460KHz |
模拟调光/PWM调光 |
SOP-8 |
|
|
2.2V-6V |
内置3A MOS |
2% |
90% |
800KHz |
SOP-8 |
||
|
2.2V-6V |
内置3A MOS |
2% |
90% |
800KHz |
DFN3*3-8 |
||
|
10V-35V |
内置3A MOS |
2% |
90% |
800KHz |
SOP-8 |
||
|
4.5V--24V |
1A |
2% |
90% |
800KHz |
ESOP8 |
||
|
3.6V-26V |
2A |
2% |
92% |
400KHz |
SOP-8 |
||
|
3.6V-26V |
2A |
2% |
92% |
400KHz |
SOP-8 |
||
|
5V-45V |
2A |
2% |
93% |
400KHz |
SOP-8 |
||
|
8V-32V |
内置8A MOS |
2% |
92% |
1MHz |
SOP-14 |
||
|
8V-32V |
外置MOS/36W |
2% |
94% |
1MHz |
ESOP-8 |
||
|
3.6V-36V |
4A |
2% |
94% |
180KHz |
TO252-5L |
||
|
5.0V-36V |
5A |
2% |
94% |
180KHz |
TO-263-5L |
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