dcdc conversion circuit is the most widely used type of conversion circuit in electronic circuits, which is widely used in various electronic equipment, instruments and meters.
How the dcdc charger works:
When DC voltage input with DC current, the output voltage Uo=I2R+U1C.
DCDC converter structure:
Power supply part:
It includes a rectifier filter circuit (generally using silicon diodes or bridge rectifiers) and a voltage regulator control circuit (generally using integrated regulators). With the rapid development of integrated circuit technology, many new switching devices have been able to realize the integrated control of rectifier filtering and voltage regulation on one IC chip. Therefore, this type of power module has the characteristics of small size, light weight, high reliability, and easy to interface with the computer and compose an automatic detection system.
Signal amplification part:
Including preamplifier and post-amplifier two parts; The preamplifier is mainly used for power amplification; The post-amplifier is mainly to complete the signal shaping processing function (such as to emphasize, deburring, etc.). At present, the commonly used power amplifier devices are MOSFET or IGBT devices. The basic unit used for signal processing is a multistage operational amplifier group composed of bipolar triode or field-effect transistor and other types of triode compound transistor to realize the signal processing function.
Driving part:
The driving part is one of the components of the entire power supply system: its role is to supply the electricity required by the load through the transformer after boosting the load (usually with a single-phase transformer), and at the same time, the output voltage is reduced and then used by other loads. (Because the DCDC converter itself has a certain output voltage value for other devices.)
Protection and control part:
It is mainly used to prevent overcurrent and overload protection and control functions: for example, when the input side is added with high voltage, the internal protection circuit will not short-circuit the input side and damage the equipment or cause the contact to burn out. In addition, it also has the function of undervoltage protection to prevent the occurrence of power supply interruption and damage to the equipment due to power outage.
Auxiliary control section:
It mainly includes some auxiliary control components to facilitate the operator to carry out corresponding operation management; For example, the temperature compensation resistor can play a role in adjusting the temperature and humidity of the working environment and so on.
Enclosure:
The function of the shell is to install all the accessories and play a moisture-proof effect; Generally speaking, the material of the shell is made of plastic material.
