Power module is a key electronic component, its definition, role and classification are as follows:
I. Definition
A power module is a stand-alone power conversion device that can be mounted directly on a printed circuit board to provide power for application-specific integrated circuits (ASics), digital signal processors (DSPS), microprocessors, memory, field programmable gate arrays (FPgas), and other digital or analog loads. It is able to convert the input power supply (such as alternating current or direct current) into a specific voltage and current power supply to meet the power needs of different electronic devices.
Second, the role
Power conversion and regulation: through the internal step-down, boost or DC conversion circuit, the input voltage (such as AC220V) is converted into the output voltage required by the equipment (such as DC5V, DC12V, etc.), and the output voltage is adjusted to ensure that the output voltage is stable within a specified range to ensure the normal operation of the equipment.
Output short circuit protection: The internal current limiting circuit protects the power module from damage or other security risks caused by output short circuit.
Overtemperature protection: When the internal temperature of the power module is too high, the internal overtemperature protection circuit will automatically start to protect the circuit and components of the power module from overheating damage.
EMC Electromagnetic compatibility: Through the internal filter and shielding circuit, reduce the radiation and scattering of high-frequency noise and electromagnetic interference to ensure the electromagnetic compatibility and anti-interference ability of the equipment.
Energy saving and environmental protection: The power module with modern design can consume less energy, make full use of energy and save resources; And in the actual application process, the impact on environmental pollution is smaller than the traditional power supply equipment.
Iii. Classification
Linear power supply module: Through filtering, rectification, power regulation circuit to convert the input voltage to the required stable DC voltage output.
Switching power module: The output voltage is stable by adjusting the duty cycle of the input voltage through the switching tube, which usually has higher efficiency and smaller volume.
Dc-dc converter: Converts the input DC voltage to the desired output DC voltage, which can be in the form of a switching power supply or a linear voltage regulator power supply.
Ac power module: Converts the input AC voltage to the required DC voltage output.
Isolated power module: has the function of isolating input and output, can effectively protect the circuit and equipment, often used in precision instruments and medical equipment and other fields.
In summary, the power module is an indispensable part of modern electronic equipment, which mainly converts the input voltage into a stable output voltage within the specified range, and protects and stabilizes the output voltage to ensure the normal operation and reliability of the equipment.