The PCB mounted DC DC converter has great effection on the stability of the system, poor quality stability of the PCB mounted DC DC converter power supply module, not only will cause the system unstable, severely damaged components, so select a good PCB mounted DC DC converter power supply module, will be a very important technology topic.
Choose a high stability of the DC DC converter power supply module, the advantage is thatreduce research and design time, make the research and development staff will focus on the products themselves, achieve products optimal, shorten the product development and validation of time, push the products to market very soon,also lead the market and winning the business on top.
1# Operating temperature
Generally speaking, the temperature operation can be divided into business level (0 ℃ ~ + 60 ℃), the industrial level (25 ℃ ~ + 71 ℃), the military level (55 ℃ ~ + 85 ℃), etc., should be considered when choosing the DC/DC power module actual system operating temperature range, choose the appropriate level.
Different temperature levels will affect the PCB mounted DC DC converter power module design and the used materials, select a suitable temperature level, is a very important factor, which will affect the stability of the DC/DC converter power supply module and reliability, if the system operating temperature higher than the limitation of the DC/DC converter power supply module, seriously will lead to a non-effective module, if operating temperature arrive the limit, have to down load use, or be appropriate heat dissipation design, such as increased convective wind speed or increase the heat sink, in order to ensure the stability of the product;
2# Efficiency
The loss in System standby, also great importance to the one of the topics in recent years, in some applications, the system works in the proportion of standby time is longer, have lower standby loss of DC DC converter power supply module is a good choice; CHONDA TECH POWER new series producst can lowest the loss of standby,get through the special design and handle, can improve overall efficiency of different load conditions, meeting the demand of the latest energy-saving.
3# Input voltage
The input voltage means the normal working range in PCB mounted DC/DC converter power supply module, generally power supply system input voltage divided into 5 v, 9V 12 v, 24 v, 48 v. when choosing DC DC converter power module input voltage range, depending on the input voltage range changes, the industry has double pressure input and four times as much input can choose, voltage range is as follows:
2:1 wide range inputDCDC converter and 4:1 wide range input DCDC converter.
Choose double input or four times input DC DC converter power supply module, just analyse the stabilize and changes of front input voltage. Too high or too low may cause DC/DC converter power supply module is abnormal action or damage, must give special attention to this point.
4# The rating power
CHONDA TECH advise the user, the actual using power should be rated power 70% to 80% as appropriate, under this principle, the PCB mounted DC/DC converter power supply module performance better, longer service life, and more benefit.
If choose the PCB mounted DC/DC converter power supply module power rating is much higher than the actual use of power, while the efficiency and working time are helpful, but will waste the costs, If the actual use in a DC/DC converter power supply module higher than power rating, this is, of course, it is not reasonable design, it’s no problem for the short time overload operation, but in the long terms,the life time must be shorten a lot. According to the products itself, although most of them have 110% ~ 180% of the overload protection design, but still need to avoid because of overload operation.
5# Frequency
The working frequency of PCB mounted DC/DC converter power supply module is inversely proportional to the volume of module, but is proportional to the loss, usually the higher the frequency, the DC/DC converter power supply module can be smaller, but the conversion efficiency would be reduced; Conversely, size be larger, the higher conversion efficiency it is.
DC DC converter power supply module frequency is divided into two kinds, in the form of a fixed frequency, another for frequency conversion.
Fixed frequency DC/DC converter power modules, its working frequency range from 150 k to 500 k Hz, the accuracy frequency usually within + 10%, ex. 250 KHZ + - 10%.
Variable frequency DC/DC converter power supply module, the frequency will change with different input voltage and load conditions.
Use small power product, frequency conversion design is a very good choice, fixed frequency and variable frequency quality depends on the client application, in general, the fixed frequency products will be easier when dealing with EMI.
6# Isolation
Accordingly, the power supply in the primary side of the product require the isolation function isolation, isolation can improve the system security and reliability, and improve the features of EMC and protect the secondary side.
In terms of DC/DC converter power supply module, most of customers need the the Isolation voltage for 1000VDC,1500VDC, some time they request the 2500VDC and 3000VDC,CHONDA TECH POWER can make the 4500VDC isolation on medicare field.