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DC/DC converters are essential components in many electronic systems, responsible for converting one level of direct current (DC) voltage to another. They are used to regulate and stabilize voltage levels in various electronic systems, ensuring that components receive the appropriate designated voltage for optimal performance and safety as depicted in Figure 1. They play a crucial role in multiple...

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Infrared (IR) and remote frequency (RF) home remote controls are being used in systems such as sound systems, televisions, lighting, and other controls. These systems are becoming increasingly complex with features including voice control, connectivity, LED displays, and capacitive touch. Remote controls should be reliable, easy to use, and have a long battery lifespan. MPS provides cost-effectiv...

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Converters are one of the most simplistic and necessary devices in modern electronics. As their name implies, converters are meant to convert a given value to a target value. This functionality is vital for any system where connected devices may not have specifications that perfectly match one another, and they can be implemented in smartphones, smart trackers that can quickly communicate location...

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电源变换器的选型是电源设计的第一步，它直接决定系统运行的稳定性与性能。通常情况下，设计人员需根据额定电流值来确定电源变换器是否能满足实际的负载能力需求。 然而，为 24V 至 5V/2A 电源轨选择 36V/3A降压变换器可以实现出色的效率、温升与性价比；但为 3.6V 至 5V/2A 电源轨选择 3A/5.5V 升压变换器则会导致芯片保护机制的突然触发。这是因为升压变换器的标称电流并不等于变换器可以实际输出的电流量。 本文将讨论升压变换器的工作原理，以确定其开关电流能力。 当开关管（M1）在一个开关周期内导通时，电流按以下路径流动：输入电压(VIN)、电感（L）和M1。其中电感电流(IL)的上升将导致电感储存能量（见图 1）。 当 M1 关断时，二极管 (D1) 继续导通；由于IL不会突然变化，电感开始释放能量。 电流按以下路径流动：VIN、L、D1和输出电压...

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技术文章

对电池供电应用来说，出色的用户体验有赖于较长的电池寿命和高性能的终端设备。静态电流 (IQ) 是优化这类应用时的重要考量参数，因为低 IQ 即意味着长电池寿命。 本文将介绍升压变换器中静态电流 (IQ) 与关断电流 (ISD) 的区别，并深入探讨如何在电池供电应用中发挥这二者的作用。 大多数电池供电应用的电池输出都相对较低，例如单节 AA 电池只有 1.5V 的输出电压 (VOUT)；但与此同时，后端 IC 或附属电路又需要较高的输入电压 (VIN)。为了给 IC 或附属电路提供足够高的 VIN，这些应用通常采用升压变换器（即 Boost 或 Step-up 变换器 ）来提升电池的输出电压。 图 1 显示了几种不同的电池类型，例如圆柱电池、纽扣电池和手机/平板电脑电池。 表 1 显示了常见的电池类型及其典型输出电压。 通常我们根据应用需求来选择电池。但...