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绿色模式PWM反激(SSR)控制器 CL1820

CL1820 是一款高集成度的PWM 反激控制器,它提供了几个功能来提高效率、EMI 改进方案,并内置完整的保护功能。轻载时,低启动电流和专有的绿色模式功能提供了逐渐降频的模式。空载时,它还内置突发模式和几个参数,以完全关闭PWM 输出,最大限度地减少外部功率管的开关损耗。CL1820 还内置了电流检测和反馈回路的前沿消隐(LEB),以屏蔽输入信号的尖峰噪声。内置的斜坡补偿使系统在通用输入电压范围内提供稳定的功率限制。锯齿波频率功能用于EMI 改进解决方案。CL1820 还提供OLP(过负载保护),VDD OVP(过压保护),输出OVP/UVP 等各种保护功能,以防止电路在异常状态下损坏。

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QR-PWM反激式控制器(SSR) CL1850/CL1850D

◆ CL1850 is a higher integrated PWM flyback power switch, which integrated various HV-MOSFET. It provides several functions to enhance the efficiency to meets the criteria of global standards such as DoE Level VI and EU CoC V5 Tier-2. Meantime, it also provides excellent EMI-improved solution, and also built in complete protection.         ◆ CL1850 is a multi-mode controller. At full load, the IC operates in fixed frequency CCM mode or QR mode based on the AC line. In this way, high efficiency in the universal input voltage at full load can achieved. At normal load, It operates in QR mode. When the load goes low, it operates in Green mode with Valley switching for high efficiency. When the load is very small, the IC operates in Burst mode to minimize the standby power loss. As a result, high efficiency can be achieved in the whole loading range.         ◆CL1850 also built-in the leading-edge blanking (LEB) of the current sensing and feedback loop to screen the spike noise form any input signal. The internal slope compensation can limit the constant output over universal AC input range. The sawtooth over frequency function for EMI improved solution.         ◆ Meanwhile, CL1850 also provides various protection, such as, OLP (Over Load Protection) ,VDD OVP (Over Voltage Protection) , Output OVP and VDD OVP to prevent the circuit damage from the abnormal conditions.         ◆CL1850 is available in SOT-23-6L and DIP8         ◆CL1850 works with current sensing synchronous rectifier controllers, such as CLR6300, to achieve higher conversion efficiency and very compact power density..

04

安卓到底是不是Linux

Linux 与 Linux 内核其实是不一样的,关于这个问题,我在之前的一篇文章中讲过(《Linux,Unix,GNU 到底有什么样的渊源?》)。Linux 的内核是由 Linus Torvalds 在1991年首次编写。它是操作系统的核心,包括设备驱动、文件系统、进程管理、网络通信等。但是操作系统光有内核,用户是没有办法操作的,所以很多厂商和 Linux 社区就在内核之上开发了很多工具,比如我们常用的 GNome桌面,FireFox浏览器、GIMP 图片编辑器等等。Linux 内核和这些应用一起打包后就被称作 Linux 发行版本。Linux 有很多的发行版本,我在之前的文章中(《这么多Linux版本,你究竟该怎么选择?》),对不同的版本做过比较。

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