Magnetizing Inrush Current Limiting in NTC Switch Mode Power Supplies (SMPS).Infrared sensing module direct sales

　　Various switch mode power supplies (SMPS) - which are small, lightweight and high performance - are commonly used as power supplies for electronic devices. When the SMPS is energized, the magnetizing inrush current with a high peak charges the smoothing capacitors, thereby charging the device. Since this inrush current can have a detrimental effect on the life of the capacitor, damage the contacts of the power switch or destroy the rectifier diode, it is necessary to take corresponding countermeasures.

　　Limiting the magnetizing inrush current of an SMPS by inserting an NTC thermistor is widely used as a way to form a low-cost simple circuit for limiting magnetizing inrush current in a power supply. The same result can be obtained even if an NTC thermistor is connected after the rectifier circuit.

　　A built-in power supply in which various power supply circuits and peripheral circuits are compactly integrated is called a power supply module. The AC-DC power module is a power supply composed of an AC-DC rectifier circuit, a DC-DC converter and a small number of external components, which can form a space-saving optimized power system. Inserting an NTC thermistor (power thermistor) can effectively limit the magnetizing inrush current applied to the input and output capacitors at power-up.

Read recommendations:

The increasingly popular radio frequency energy harvesting technology

NTC temperature sensor for electric heating floor

HW-MS01 microwave sensor module

HW808

PIR Lens 8605-2