Cxle8263 adopts the patented dimming control mode, which can realize the fixed brightness dimming of level 2 and level 3 and the adjustable brightness dimming of level 3 through a simple peripheral circuit. The load current can be changed from 100% to 60% to 12% when the brightness of the third gear is fixed. The load current can be changed from 100% to 8% when two levels of brightness are fixed. The load current of the last two dimming levels can be set flexibly through the external resistance when the third dimming level is adjustable.
When the cxle8263 chip works in full brightness, it works in the discontinuous mode of inductance current. It adopts the transformer primary side feedback control, and can realize constant current without secondary feedback circuit and compensation circuit, which greatly saves the system cost and volume. The chip adopts the patented constant current control mode, which can achieve excellent linear adjustment rate and load adjustment rate.
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[ CXLE8263 ]"
目录
产品概述 返回TOP
CXLE8263是一款高性能，隔离LED开关（ON/OFF）调光驱动芯片，适用于 85Vac~265Vac全范围输入电压。
CXLE8263采用专利的调光控制方式，可以通过简单 的外围电路实现 2 档、3 档固定亮度调光，以及3档可调亮度调光。在固定三档亮度调光时，可以 实现负载电流 100%---60%--12%三档变化。在固定 两档亮度调光时，可以实现负载电流 100%---8% 两档变化。在三档可调亮度调光时，最后两档调 光的负载电流可以通过外置电阻灵活设置。
CXLE8263芯片在全亮度工作时，工作于电感电流断 续模式，采用变压器原边反馈控制，无需次级反 馈电路，也无需补偿电路即可实现恒流，极大的 节约系统成本和体积。芯片采用了专利的恒流控 制方式，可以达到优异的线性调整率和负载调整率。
CXLE8263具有多重保护功能，包括LED开路/短路保 护，VCC过压、欠压保护，芯片温度过热调节等。
CXLE8263采用 SOT23-6 封装。
产品特点 返回TOP
普通开关 ON/OFF 调光
灵活的调光亮度设置
芯片超低工作电流
宽输入电压
±5% LED 输出电流精度
LED 开路保护
LED 短路保护
芯片供电欠压保护
芯片供电过压保护
过热调节功能
采用 SOT23-6 封装
应用范围 返回TOP
LED 日光灯
LED 吸顶灯
LED 球泡灯
其它 LED 照明
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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| 开关调光调色 | |||||||
| Part number | Package | PF | Topology | Pout Max(W) | MOS | Dimming logic | Colour-mixing State Power |
| CXLE8263 | SOT23-6 | 0.5 | FLYBACK/BUCK-BOOST | 50 | External | Set by SEL PIN | - |
| CXLE8264 | SOP16 | 0.5 | BUCK | 70/Channel | External | A->B->A+B | A+B |
| CXLE8265 | SOP16 | 0.5 | BUCK | 70/Channel | External | A->B->A+B | Adjustable |
| CXLE8266 | SOP8 | - | - | 18 | 80V/1Ω | A->B->A+B | (A+B)/2 |
