It can work in constant current or constant voltage mode through different application circuits. In the constant current mode, the output current can be adjusted by setting the resistance of CS pin to the ground; in the constant voltage mode, the output voltage can be set by setting the output partial voltage resistance of the auxiliary winding of the transformer; in addition, the output voltage line loss compensation circuit is set inside the chip, and the appropriate line loss compensation can be obtained by adjusting the resistance value of the partial voltage resistance. Cxle8409 provides soft start and various protection mechanisms, including power tube current limiting mode, power supply voltage overvoltage protection, power supply voltage undervoltage protection, and power clamp circuit. By setting appropriate parameters, the system can obtain high precision output constant voltage and constant current control
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[ CXLE8409 ]"
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
CXLE8409是一款高精度隔离型反激式AC-DC 控制器，适用于小功率的充电器和适配器等。其工作在原边反馈模式，无需光耦和TL431。通过不同的应用电路可使其工作在恒流或者恒压模式。在恒流模式下，输出电流可通过设置CS 引脚对地的电阻来调节；在恒压模式下，可通过设置变压器辅助绕组输出分压电阻来设定输出电压；另外芯片内部设置了输出电压线损补偿电路，可通过调节分压电阻的阻值来得到合适的线损补偿。CXLE8409提供了软启动和各种保护机制，包括功率管限流模式，电源电压过压保护，电源电压欠压保护，以及电源钳位电路等。通过设置合适的参数，系统可以得到高精度的输出恒压以及恒流控制。
二.产品特点
恒压输出控制：±5%精度
高精度恒流输出控制
原边反馈控制，无需光耦和 TL431
可调输出电压
输出电流的负载调整率可调
内建软启动功能
可调线损补偿
内建限流输出控制
内建欠压保护和过压钳位功能
内建过压保护模块
三.应用范围
隔离小功率适配器模块
隔离小功率充电器模块
隔离 LED恒流驱动模块
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
| 隔离产品 | |||||
| 产品型号 | 隔离 | 内置功率管 | 封装形式 | 功率范围 | |
| CXLE8413 | Y | MOSFET,650V/0.8A | SOP-8 | 5-7W | (SOP-8)_CN |
| CXLE8414 | Y | MOSFET,650V/1.2A | SOP-8 | 7-9W | (SOP-8)_CN |
| CXLE8415A | Y | MOSFET,650/2.0A | DIP-7 | 12-18W | (DIP-7)_CN |
| CXLE8416 | Y | MOSFET,700V/3.0A | SOP-8,DIP-7 | 12-18W | (SOP-8&DIP-7)_CN |
| CXLE8417 | Y | MOSFET,700V/4.0A | DIP-7 | 18-24W | (DIP-7)_CN |
| CXLE8418 | Y | MOSFET,BJT | SOP-8 | UP to 60W | (SOP-8)_CN |
| Product | Character | Standby Power | SW Voltage | VDD Operation Voltage | Output Power | CC Precision | PF | Package | Note |
| CXLE8218 | CC PSR Converters | 0~650V | 0.5 | 13Ω | 8.4~25V | 5W | ±5% | SOP8 | Spot/Bulb |
| CXLE8219 | CC PSR Converters | 0~650V | 0.5 | 4.5Ω | 9~30V | 12W/18W | ±3% | DIP7 | Bulb/Panel |
| CXLE8220 | CC PSR Converter | 0~650V | 0.5 | 2Ω | 9~30V | 24W | ±3% | DIP7 | Bulb/Panel |
| CXLE8221 | CC PSR Converter | 0~650V | 0.5 | 1.6Ω | 9~30V | 36W | ±3% | DIP8 | Bulb/Pane |
| LED驱动 > 隔离型(AC/DC) | ||||||
| 产品型号 | 输入电压 | 输出电压 | 输出电流 | 工作效率 | 产品封装 | 备注 |
| CXLE8409 | 85-265V | 低于输入 | 2.5A | 80% | SOT23-6 | PWM驱动MOSFET+PSR 无431，无光耦 |
| CXLE8410 | 85-265V | 低于输入 | 1.8A | 93以上 | sop-8 |
PWM外驱MOSFET+PSR+PFC无431，无光耦 |
