Cxle8697 is a high efficiency, stable and reliable high brightness LED constant current drive control chip, built-in high-precision comparator, fixed off time control circuit, constant current drive circuit, etc., especially suitable for constant current drive of high-power, multiple high brightness LED light strings.
Cxle8697 adopts the peak current control mode with fixed off time, and its working frequency can reach 1MHz at most, which can reduce the volume of external inductance and filter capacitance, improve efficiency and save PCB area. The minimum turn off time is 620ns, which can be adjusted by the external capacitance, and the working frequency can also be adjusted according to the user's requirements. Add PWM signal at en end to adjust the brightness of LED lamp.
Cxle8697 sets the current flowing through the LED lamp by adjusting the resistance value of the external current detection resistor, so as to set the brightness of the LED lamp. The current flowing through the LED lamp can vary from tens of Ma to 2.5 A
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[ CXLE8697 ]"
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（PDF文档）
一.产品概述
CXLE8697是一款高效率，稳定可靠的高亮度LED灯恒流驱动控制芯片，内置高精度比较器，固定关断时间控制电路，恒流驱动电路等，特别适合大功率、多个高亮度LED灯串的恒流驱动。CXLE8697采用固定关断时间的峰值电流控制方式，其工作频率最高可达 1MHz，可使外部电感和滤波电容体积减小，效率提高，节省PCB面积。关断时间最小为620ns，并可通过外部电容进行调节，工作频率也可根据用户要求进行调节。在 EN端加 PWM信号，可调节LED灯的亮度。CXLE8697通过调节外置电流检测电阻的阻值来设置流过LED灯的电流，从而设置LED灯的亮度，流过LED灯的电流可从几十毫安到2.5安培变化。
CXLE8697采用SOT23-6封装。
二.产品特点
Ø 宽输入电压范围：2.5V~100V
Ø 高效率：可高达 90%
Ø 最大工作频率：1MHz
Ø 芯片供电欠压保护：2.5V
Ø 峰值电流采样电压：250mV
Ø 亮度可调：EN 端加 PWM 信号
Ø 关断时间可调
Ø 内置电流采样前沿消隐电路
三.应用范围
Ø 平板显示器 LED 背光灯
Ø 自行车灯
Ø LED 射灯
Ø 强光手电筒
四.技术规格书（产品PDF)
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！
五.产品封装图
六.电路原理图
七.相关芯片选择指南 更多同类产品......
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降压恒流驱动系列 |
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型号 |
输入电压 |
输出电压 |
开关频率 |
最大输出电流 |
功能介绍 |
封装 |
|
2.5V~100V |
2.5V~80V |
300K |
5A |
外置稳压,外置MOS,调光 |
SOT23-6 |
|
|
6V～60V |
55V |
300K |
1.2A |
内置MOS,PWN调光,线性调光,过温保护短路保护开路保护 |
SOT89-5 |
|
|
8V~100V |
2.5V~80V |
300K |
0.8A |
外置稳压,内置MOS,PWM 调光 |
ESOP-8 |
|
|
8V~100V |
2.5V~80V |
300K |
0.8A |
外置稳压,内置MOS,PWM 调光 |
ESOP-8 |
|
|
8V~100V |
2.5V~80V |
300K |
1.5A |
外置稳压,内置MOS,PWM 调光 |
ESOP-8 |
|
|
8V~100V |
2.5V~80V |
300K |
1.5A |
外置稳压,内置MOS,PWM 调光 |
ESOP-8 |
|
|
3V~100V |
2.5V~80V |
300K |
5A |
内置稳压,外置MOS,带二功能（全亮,1/4亮 |
SOT23-6 |
|
|
3V~100V |
2.5V~80V |
300K |
5A |
内置稳压,外置MOS,带三功能(全亮, 半亮, 爆闪), |
SOT23-6 |
|
|
3V~100V |
2.5V~80V |
300K |
5A |
内置稳压,外置MOS,三功能(全亮, 暗亮 1/4, 爆闪) |
SOT23-6 |
|
|
3V~100V |
2.5V~50V |
300K |
4.2A |
外置稳压,内置MOS |
SOP-16 |
|
|
8V~100V |
2.5V~80V |
300K |
10W |
内置MOS,PWM 调光,线性调光,内置稳压 |
ESOP-8 |
|
|
8V~100V |
2.5V~80V |
300K |
22W |
内置MOS,PWM 调光,线性调光,内置稳压 |
ESOP-8 |
|
|
8V~100V |
2.5V~80V |
300K |
30W |
内置MOS,PWM 调光,线性调光,内置稳压 |
ESOP-8 |
|
|
3V~20V |
3~10.5V |
300K |
15W |
内置30VMOS 管, 内置 18mΩ带五功能模块 |
ESOP-8 |
|
|
3V~20V |
3~10.5V |
300K |
15W |
内置30VMOS 管, 内置 18mΩ带三功能模块 |
ESOP-8 |
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