In the process of using, DC-DC power supply module will occur some common failures. The article will start from two parts, such as what are the common faults and solutions of DC-DC power module input and output, and what are the common faults and solutions of the DC-DC power module.
Here is the content list:
What are the common faults and solutions of DC-DC power module input and output?
What are the common failures and solutions of DC-DC power modules?
What are the common failures and solutions of DC-DC power supply module input and output?
1. Input voltage is too high
①Ensure that the output is not less than 10% of the rated load, if the actual circuit work will have a no-load phenomenon, connect a dummy load of 10% of the rated power at the output in parallel.
② Replace a reasonable range of input voltage, the presence of interference voltage to consider the input side and on the TVS tube or voltage regulator.
2. Output voltage is too low
①Adjust the voltage or switch to a higher power input power supply.
②Adjust the wiring, increase the cross-sectional area of the wire, or shorten the length of the wire to reduce the internal resistance.
③Replace the diode with a small on-state voltage drop.
④Reduce the value of the filter inductor or reduce the internal resistance of the inductor.
3. Output noise is too large
①Connect 0.1μF decoupling capacitor at the power input of noise-sensitive components of the main circuit (e.g. A/D, D/A, or MCU, etc.).
②Use a multi-output power supply module instead of multiple single-output modules to eliminate differential frequency interference.
③Use a remote grounding point to reduce the ground loop area.
What are the common failures and solutions of DC-DC power supply modules?
1. Poor power supply voltage resistance
①The voltage is gradually adjusted upward during the withstand voltage test.
②Select a power supply module with a high withstand voltage value.
③When welding the power supply module, choose the right temperature to avoid repeated welding and damage to the power supply module.
2. Power supply module start-up difficulties
①The external capacitor is too large, charging it for a longer time when the power supply module starts, it is difficult to start, you need to choose a suitable capacitive load.
② capacitive load is too large needs to be first in series with a suitable inductor.
③The output load is too heavy it will cause a longer start-up time, choose the appropriate load.
④Switch to a higher power input power supply.
3. Serious module heating
①Add heat sink when using a linear power supply.
②Increase the load of the power module to ensure no less than 10% of the rated load.
③Reduce the ambient temperature to maintain good heat dissipation.
4. Module power supply damage faster
①Ensure that the output is not less than 10% of the rated load if the actual circuit work will have a no-load phenomenon, on the output side and connected to a dummy load of 10% of the rated power.
②Select capacitors that meet the specifications of the power supply module technical manual.
③Select the appropriate input voltage.
5. Power supply module on the power quickly burned
①Check or add an anti-reverse connection protection circuit before wiring.
②Select the appropriate input voltage.
③Check the capacitor polarity before power on to make sure it is correct.
④Add short-circuit protection to the output of the power module.
Understanding the common faults and solutions of the DC-DC power module, to better use the DC-DC converter. We always adhere to the "customer first, the brand first, technology to improve life" purpose and "quality, integrity, the best service, the latest technology" commitment, dedicated to wholehearted service, to provide quality products, to meet the needs of diverse customers, to meet the Diversified market demand. If you have relevant needs, welcome to visit our official website: https://www.smunchina.com. for consultation and understanding. Thank you very much for your support.
