SA168K16 3BSE016029R1 Basic Power Sypply

The SA168K16 3BSE016029R1 basic power unit module is a power supply integrated module, also

known as a power supply or power device, which is an important part of electronic devices used to

provide electrical energy. This power module can convert other forms of energy (such as chemical

energy, mechanical energy, light energy, etc.) into electrical energy to meet the working needs of electronic devices.

The classification of power supply can be divided into DC power supply and AC power supply according

to the nature of its output current, and can also be divided into linear power supply and switching

power supply according to the different design principles. Among them, linear power supply is one

of the earliest used power supply, its basic composition is transformer, rectifier circuit, filter circuit

and voltage regulator circuit. The switching power supply is the use of switching tube periodic switch

to control the input power supply voltage, its basic components are input filter circuit, rectifier

circuit, switching circuit, output filter circuit and control circuit.

SA168-3BSE003389R1

Linear power supply and switching power supply each have their advantages and disadvantages, as follows:

Advantages of linear power supply:

Low Electromagnetic interference (EMI) and ripple coefficient: Since a linear power supply has no

switching operation, it is a continuous analog control and therefore produces very low electromagnetic

interference and ripple coefficient, which is an important advantage in applications requiring high stability and accuracy.
High voltage regulator: Linear power supply design is relatively simple, high voltage regulator

performance, can provide stable output voltage.
Easy maintenance: The structure of the linear power supply is relatively simple, if there is a failure,

it can be repaired by technicians who understand the electronic equipment, and the maintenance cost is relatively low.
Excellent lightning resistance: Due to the structural characteristics of the transformer, the linear power supply has a good lightning resistance.
Disadvantages of linear power supply:

Low efficiency: The efficiency of linear power supplies is usually between 40% and 60%, which is

relatively low, which means that there is a large energy loss in the process of converting electrical energy.
Large volume: Because linear power supplies require larger transformers and radiators to

dissipate heat, their volume is usually large and not suitable for use in small electronic devices.
Advantages of switching power supply:

High efficiency: The energy efficiency of switching power supplies can generally reach 80% to 90%,

which is significantly improved compared with linear power supplies and can effectively reduce energy loss.
Strong load adaptability: The switching power supply can automatically adjust the output voltage

according to the change of the load, so as to ensure the output voltage stability.
Small size: The internal integration of the switching power supply is high, and small

size design can be achieved, which is very suitable for small electronic devices.
Low cost: Due to the use of Power Electronics technology, you can use fewer components to

produce a fully functional power supply, reducing costs.
Disadvantages of switching power supply:

Large output ripple: Due to the high conversion frequency of the switching power supply,

there may be small ripple at the output end, which needs to be processed by the filter circuit.
EMI interference is serious: the switching power supply will produce a high interference peak

during the working process, which is easy to affect the surrounding electronic

equipment, and suitable shielding processing is required.
Design and maintenance is relatively complex: there are many types of components used by

switching power supplies, including switching tubes, transformers, inductors, etc., and

the design and maintenance are relatively complex.
In general, linear power supplies and switching power supplies have their advantages

and disadvantages, and which power supply to choose depends on the specific application needs and environmental conditions.