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ADI ADP2450 断路器电源管理IC解决方案

ADI公司的ADP2450是专用的电流变压器(CT)取电控制器,集成了带电源检测的升压分流控制器,高效降压稳压器,四个低失调低功耗可编增益放大器(PGA),一个低失调运放,一个快速模拟解扣电路和一个执行器驱动器,输入电压4.5V-46V,可调输出电压4.5V-36V,可低至0.6V,连续输出电流500mA,固定开关频率1.2MHz,主要用在低压电路断路器和电流变压器(CT)电源.本文介绍了ADP2450主要特性,功能框图,应用电流以及评估板ADP2450ACPZ-3-EVBZ主要特性,电路图,材料清单和PCB设计图.

The ADP2450 integrates one boost shunt controller with powerdetection, one high efficiency buck regulator, four low offset,low power consumption programmable gain amplifiers (PGAs),one low offset operation amplifier, a fast analog trip circuit, and an actuator driver. The ADP2450 is targeted for low voltagecircuit breaker, such as molded case circuit breaker (MCCB),and CT powered supply applications. The boost output voltage can be up to 36 V and integrates apower detection circuit that prevents the circuit from powerhiccups. The power detection threshold is programmable with resistors.

The buck regulator operates over a wide input voltage rangefrom 4.5 V to 36 V, and the output voltage can be adjusted downto 0.6 V. The buck regulator provides output currents of up to 500 mA. The buck regulator works in pulse-width modulation (PWM) mode with a fixed 1.2 MHz switching frequency, providing low output ripple vo

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