Abstract: This application note describes the use of a current-sense amplifier to monitor the load current of a circuit supply voltage. When the current being drawn from the supply exceeds the predetermined level, an external pass transist...

Derive 12V...

Abstract: Using a current-sense amplifier, a high-side MOSFET driver, and a latching voltage monitor a circuit can be easily constructed that protects from overcurrent conditions and operates at voltages as high as 26V. W...

Abstract: A current-sense amplifier, comparator, external CMOS switch, and an external transistor can be used to create a circuit breaker. The simplicity of low-side current monitoring can mask the advantages of a high-si...

Abstract: A combination of current-sense amplifier, dual-comparator and external CMOS switches can be used to prevent the damaging effects of a reversed-polarity battery or short-circuit load. The most widely used device ...

Abstract: The flyback dc-dc converter topology results in significant cost and space savings for multiple output power supplies with high output voltage for power levels up to 100W. Flyback topologies store and transfer energy using a tran...

Abstract: This application note describes the use of current sense amplifiers, differential amplifiers and instrumentation amplifiers to measure battery charge and discharge currents in portable equipment, computer notebooks and USB access...

高側(cè)電流傳感器顯示正...

Abstract: Output overvoltage protection is a critical feature for DC-DC converters in order to protect sensitive loads from permanent damage. The basic requirements for an overvoltage protection (OVP) circuit are precise sensing of the out...

摘要：本應用筆記討論過壓保護在連接系統(tǒng)電路的開關(guān)和復用器中的必要性。MAX4711/MAX4712/MAX4713模擬開關(guān)工作在2.7V至11V，集成了故障保護功能。本文還介紹了其它幾種故障保護方案...

摘要：利用遠程溫度傳感器監(jiān)測高性能微處理器和圖象處理器的管芯溫度現(xiàn)已成為一種很普通的技術(shù)，被用于系統(tǒng)的功率和熱量等工況的管理。隨著時鐘速度、電路密度和功率水平...

Abstract: This circuit provides flexible fault protection for a 4-20mA current loop. In addition, it includes circuitry for recovering digital signals (such as the HART protocol) imposed on the loop. 4-20mA current loops ...

摘要：對于那些想要測量系統(tǒng)中溫度的設計師來說，有多種技術(shù)可供選用。熱敏電阻、熱電偶、RTD及溫度傳感器IC，它們在特定情況下都具有相應的優(yōu)勢及劣勢。本文對當前幾種最常...

Abstract: Combining a low-dropout (LDO) linear regulator with an OR gate produces a circuit that allows a single pushbutton to turn a microprocessor-based portable system on and off. When placing a microprocessor-based po...

Abstract: A microprocessor-supervisor IC and two external MOSFET switches form a low-voltage backup power supply that can provide several amperes when the main supply fails. Every subsystem in an electronic product depend...

Abstract: Because of internal circuit-breaker delay and limited MOS-gate pulldown current, many hot-swap controllers do not limit current during the first 10µs to 50µs following a shorted output. The result can be a brief flow ...

Abstract: This application note describes a circuit that protects an n-channel power MOSFET against low and high voltages. It includes a high-side switch-driver IC and fast-response, 3-transistor, overvoltage detector. Vo...

Abstract: Substituting a shunt regulator (U1) for the usual transistor in this power-amplifier circuit improves the current-limit accuracy. Adding current-limiting circuitry to an emitter follower protects both the pass t...

Abstract: Simple easy to use high side current sense amps protects power supplies as a result of irregular supply voltage caused by short-circuit conditions. To ensure compliance with all international standards, the desi...

電源故障保護布局-P...