首页 > Products > Led Driver > LED Control Circuit > PWM Control IC >Cxle8940 is a constant frequency current source PWM controller designed for off-line and DC-DC switching power supply applications The internal protection circuit includes
Cxle8940 is a constant frequency current source PWM controller designed for off-line and DC-DC switching power supply applications The internal protection circuit includes
The internal protection circuit includes temperature compensation precision reference, adjustable oscillator for precise duty cycle regulation, high gain error amplifier, current sensing comparator, high current push-pull output stage suitable for power MOSFET drive, single cycle current limiting undervoltage lock, dead band adjustable, single pulse counting lock and so on.
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[ CXLE8940 ]"
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产品概述 返回TOP
CXLE8940是专为脱线和DC-DC开关电源应用设计的恒频电流型 PWM 控 制器。内部包含温度补偿精密基准、供精密占空比调节用的可调振荡器、高 增益误差放大器、电流传感比较器和适合作功率 MOSFET 驱动用的大电流推 挽输出级以及单周期徊滞式限流欠压锁定、死区可调、单脉冲计数拴锁等保 护电路。
CXLE8940采用 DIP8/SOP8 的封装形式封装。产品特点 返回TOP
起动电流小（< 0.5mA）
自动前馈补偿
具有徊滞特性的欠压锁定
最大占空比箝制
工作频率可达 500kHz
应用范围 返回TOP
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产品封装图 返回TOP
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| 通用PWM控制IC | ||||||||
| 型号 | 最大电源电压 | 启动电流 | 振荡频率 | 最大输出电流 | 平均电源电流 | 启动电压 | 维持电压 | 封装 |
| CXLE8938 | 42V | 1K-200KHz | 200mA | 7mA | DIP16/SOP16 | |||
| CXLE8939 | 42V | 1K-200KHz | 200mA | 7mA | DIP16/SOP16 | |||
| CXLE8940 | 30V | 0.12mA | 47K-57KHz | 12mA | 12mA | 16V | 10V | DIP8/SOP8 |
| CXLE8941 | 30V | 0.12mA | 47K-57KHz | 12mA | 12mA | 8.4V | 7.6V | DIP8/SOP8 |
