The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components.

下载UC3845B中文资料、引脚图、Datasheet数据手册，有AC-DC控制器和稳压器详细引脚图及功能的应用电路图电压和使用方法及教程。

TI 的 UC3845 是一款 具有 8.4V/7.6V UVLO 和 50% 占空比、温度范围为 0°C 至 70°C 的单端 500KHz 电流模式 PWM 控制器。 查找参数、订购和质量信息.

Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output sta...

2025年1月14日 · UC3845是高 性能 固定频率电流模式控制器，专为离线和直流至直流变换器应用和设计，它内部具有振荡器、能进行精确的占空比控制、温度补偿参考、高增益误差放大器、电流取样 比较器 和大电流图腾柱式输出，可以说是驱动功率场效应管（MOSFET）的理想器件。 其管脚图如下。 UC3845有低压锁定门限，即当它的供电电源低于等于10V时，停止输出；当大于10V时，才能使得正常输出（典型值为16V通，10V断）。 电流模式工作到500KHZ。 现在对 …

The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components.

olds for the UC3843B and UC3845B are 8.5 V and 7.9 V. The UC3842B and UC3843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844B and UC3845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.

The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components.

2018年1月2日 · UC3845 是高性能固定频率电流模式控制器专为离线和直流至直流变换器应用而设计，为设计人员提供只需最少外部元件就能获得成本效益高的解决方案。 这些集成 电路 具有可微调的振荡器、能进行精确的占空比控制. 前言本人于近期在项目中用到开关电源，故深入探索了开关电源的制作，在这里简单分享一下使用 制作的开关电源，以控制电源的通断。 一、 芯片介绍先介绍 芯片的特点和. 叙述单端反激式原理、电流控制型 优点、 芯片特点,提出了一个实用的高 …

Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference …