Some models can reach a desired output voltage by trimming through an external resistor or external voltage (Example: 1~5VDC). Before using this function the following should be noted: Notes: 1. The range of trimming voltage through external resistor or voltage control varies from model to model. Please refer to the specification before using it. 2. If you [...]
Category: Use Power Supply
There are two forms of power supply output ripple & noise which requires suppression sometimes: (1) Differential-Mode Noise Suppression as shown in below figure, adding C1~C4 can reduce this form of noise. C1 and C3 are electrolytic capacitors (reference value: 47uF~100uF), while C2 and C4 are high frequency capacitors (reference value: 0.01uF~0.1uF). In general, adding C3 and C4 [...]
Input Surge and Lightning Shock are two of the most common factors cause power supply failure, here is some tip for prevent them: (1) Input Surge: The ON/OFF of heavy industrial machine will cause variance of nearby power line voltage. Sometimes the variance is so large that specification of the power supply is exceeded and in turn [...]
When using many power supplies at the same time, the huge inrush current may exceed the rating of external wiring. The following delay circuit can suppress the inrush current caused by multi-power supply operation.
First of all, to assure charging efficiency and lifetime, please use models with charging function, such as Meanwell PB series smart charger. When the switching power supply is used as a charger, be sure to add a series blocking diode at the output terminal (with suitable heat sink). This arrangement is to prevent reverse voltage from [...]
If the switching power supply is connected to a dynamic load such as LED monitor, the output current will change abruptly and cause high ripple current and audio noises. A Meanwell LED power supply is recommended here, However for ordinary power supplies, we can also add suitable capacitors at the load end to improve these problems [...]
If the Switchmode Power Supply is connected in parallel with coil loads, such as motors, solenoid valves etc., there will be a huge peak current or a reverse voltage when the load is activated. It is recommended to use suitable capacitors and add a blocking diode to protect the Switchmode Power Supply We also can use Switchmode Power Supply with [...]
If the Switchmode Power Supply is connected to a large capacitive load such as large capacitors or lighting device, the set up time of the Switchmode Power Supply will increase or may even prevent the Switchmode Power Supply from starting up. Users should use power supplies with the constant current limiting function or ask the Wellforces for assistance.
There are high voltage and high impedance circuits in the S.P.S. So before turning on the power supply, be sure that there is no water condensation in the unit. If the S.P.S. is working at low temperature and then stored at high temperature or outdoor environment with high moisture and temperature differences between day and [...]
If the S.P.S. uses a thermistor to suppress the inrush current; it could cause a failure to start up at low temperature (such as –10℃) due to temperature sensitivity. Following are some methods to solve this problem: (1) Keep the power supply at standby status (Keep AC source ON and then switch the output ON/OFF). [...]