How to select the correct
MEAN WELL Charger & Lithium Battery
In recent years, the world has witnessed a significant shift toward sustainable energy solutions, with lithium-ion batteries emerging as a cornerstone of this transformation. From powering electric vehicles to storing renewable energy, lithium batteries have become increasingly vital in our quest for cleaner, more efficient energy systems.
Lithium batteries play a crucial role in modern energy storage and power solutions. Among various lithium-ion chemistries, two major types are NMC (Nickel Manganese Cobalt) and LFP (Lithium Iron Phosphate). Both have unique properties that make them suitable for different applications in industrial, consumer electronics, electric vehicles (EVs), and renewable energy storage. Today, MEAN WELL Europe offers a complete solution with a smart charger and lithium battery pack. By understanding every customer’s needs, we provide standard and personalized solutions.
We invite you to join us in exploring lithium batteries. We will uncover how these remarkable energy storage devices are changing the way we live and work and influencing the global transition to a more sustainable energy landscape.
Batteries offered by MEAN WELL Europe
Nowadays, the dynamics of the energy sector are rapidly changing, and the electrification process is accelerating. MEAN WELL Europe has expanded its product offering by including IoT-connected lithium batteries, which are made in Europe.
Here is the Lithium Battery offering from MEAN WELL Europe.
Advanced Battery
Coming soon
Customized Battery
Coming soon
Accessory
Coming soon
Part 1: Batteries
1.1 How does a Battery work?
A battery has 2 poles, a positive and a negative pole, depending on whether you charge or discharge the battery, a reaction takes place in which electrons move from the positive to the negative side.
This effect is called a redox reaction (reduction-oxidation), in which the electrons are released from the cathode (reduction) and bind to the anode via an electrochemical reaction (oxidation). This creates a potential difference and electrode current, which can be used to drive a user, such as an electric motor.
These anode and cathode have the largest possible surface area and therefore consist of layers or are rolled up in a cell. The cell contains electrolyte in which the electrons can move freely from the anode to cathode.
1.2 Types of batteries
Basically, there are 3 types of battery, these types are divided into subcategories.
- Lead Batteries: divided into AGM and GEL
- Lithium Batteries: divided into NMC, LiFePO4, and the rest.
- The rest: divided into NiCd and NiMH, among others.
1.3 Lead-acid Batteries
For years, these were the most common batteries worldwide. Most are of the AGM (Absorbed Glass Mat) or GEL type.
With the latter, the electrolyte is incorporated in a kind of gel. The advantages of AGM batteries are the higher discharge currents than what is possible with gel. Because the electrolyte in gel batteries is processed in a gel, the electrons can move less freely. An advantage about GEL batteries is that you can usually mount them in multiple positions (such as upside down), which is usually not possible with AGM batteries.
These batteries can usually be discharged much deeper on a regular basis without high levels of chemical wear. A term you will also encounter is SLA, which means sealed lead acid and does not mean anything other than that these batteries are completely closed and cannot be refilled with electrolyte, which also applies to MF (maintenance free).
1.4 Lithium Batteries
Here we only discuss about NMC and LiFePO4 batteries. There are many other types of batteries that are based on lithium. NMC, or Nickel Manganese, Cobalt Oxide is a very popular chemical compound, commercially strong due to the favourable cost of ownership.
The NMC cells can be supplied as Polymer (LiPo) in the form of a rectangular so-called “pouch cell” and in a cylindrical shape such as the very popular 18650 cell shape, they are then called lithium ion (li-ion) cells. The disadvantage of LiPo cells is the higher initial costs and the lack of a CID (Current Interrupt Device), interrupts the circuit if the cell temperature is too high. This could, for example, occur during charging if the cell is broken. The CID is incorporated in the positive pole of the cell.
LiFePO4 basically has a longer lifespan than NMC due to the lower wear rate, but because the energy density and nominal voltage are lower, you need more cells to achieve the same power as NMC cells. This results in a higher cost price and a larger and heavier battery than what is possible with NMC. The positive point of LiFePO4 beyond its lifespan is the safety attributed to the cells.
1.5 Voltage (V)
Lead-acid batteries have a nicer linear decrease in voltage during use than lithium. Lithium has a flatter curve, roughly between 10% and 90% of the discharge time.
How do we arrive at the voltages indicated on a battery?
To do this, it must first be explained what exactly “nominal voltage” means. This nominal voltage is the average voltage of the battery (the voltage of a battery therefore slowly decreases during consumption). This average voltage is used as the calculation voltage and is called the nominal voltage.
You can calculate this nominal voltage by multiplying the number of cells in series by the nominal cell voltage below.
- NMC (Li-ion/LiPo) 3.6/3.7V
- LiFePO4 3.2V
- Lead acid AGM/GEL 2.0V
Now we come to the voltage indicated on a battery or charger, which is usually an approximation of the nominal battery voltage. So for which type of battery the charger is suitable. This is usually correct with lead/batteries. There are more differences and creative approaches with lithium batteries because the older lead-acid batteries are taken as a reference. For example, 12V can be made very nicely with 2V nominal cells, but with 3.6V Li-ion cells this is of course not possible and 3S or 4S is often used, both of which are called a 12V battery, which is of course not entirely correct.
When a very high power is required from a battery, the voltage of the battery drops at that moment, this is a phenomenon called voltage drop. This effect is caused by the resistance in the battery, so much energy is required from the battery that the redox reaction does not go fast enough. This occurs, for example, when a starter motor in a combustion engine is activated, the required current is so high that the voltage (temporarily) drops.
1.6 Capacity (Ah or Wh)
The capacity of a battery, also known as ampere hours (Ah), is determined by the total surface area of the anode and cathode per cell and how many of these cells are in parallel.
Suppose the cells in the above diagram have a capacity of 10Ah each, then the total capacity is 10*4= 40Ah. If the cells in this example have a voltage of 2V, the voltage of the entire system remains 2V.
Although capacity is often expressed in Ah, it is more accurate to express the capacity of a battery in Wh (Watt hours), or Voltage (V) * Ampere hours (Ah). This applies in particular to all batteries that are not based on lead acid or 1.5V penlites. For all other forms, including lithium, the voltage is often rounded to an equivalent lead-acid battery variant.
As an example; take a 12V 10Ah lead battery and a 12V 10Ah li-ion battery. You would initially say that the capacity of both batteries is the same. The capacity of the lead acid battery in Watt hours is 12*10 = 120Wh. For the lithium battery you must first know whether this is a 3S or 4S version to approach 12V, after all 3*3.6V = 10.8V and 4*3.6V = 14.4V. In other words, 12V cannot actually be simulated well with li-ion cells, yet it is offered. Let’s assume it’s 4S. Then the sum becomes 14.4V*10Ah is 144Wh. Basically more effective than the lead battery, and then we leave the Peukert effect aside.
Part 2: Chargers
2.1 How does a charger work?
A charger works by applying a certain voltage (V) and current (A) to a battery. That is why there is always a voltage and current indicated on the label of a charger. Please note that the current of a charger is indicated in A of amperes, so this is slightly different from the capacity of a battery, which is indicated in Ah (ampere hours).
You can calculate how quickly you can charge your battery with a particular charger based on the charging current A of the charger and the capacity in Ah of the battery. You can charge a 20Ah battery in about 4 hours with a 5A charger (20/5). – It is an approximation, depending on the charging phases that the charger has.
2.2 Which charger do I need?
Which charger you can use depends on which type of battery is used, so you all need different chargers for the batteries below:
- NMC (li-ion/LiPo)
- LiFePO4
- Lead/acid AGM
- Lead/acid GEL
The charging characteristic for all the above batteries is CC/CV, which means constant current/constant voltage. In other words, first, it is charged with a constant current (the current indicated on the charger), then with a constant voltage. While this voltage is maintained, the current drops to the charger’s cut-off point. For different types of batteries, there are different specified charging currents at that point.
Please see below; this is a typical CC/CV charging curve for 2/3 stage charging curves. It depends on the characteristics of the battery that you are using. This is the MEAN WELL spec of NPB-750 for your reference.
In addition to this 1st phase (CC) and 2nd phase (CV), MEAN WELL smart chargers have additional phases depending on whether it is a lead or lithium charger (2 or 3-stage selectable via DIP S.W on panel or set via SBP-001, Intelligent Battery Charging Programmer). For example, lead-acid chargers have a float mode as the 3rd phase, in which the batteries are kept at a fixed voltage with a small current. The lithium chargers have a “rest phase” as a 3rd phase in which the voltage of the battery drops. If the voltage falls below a preset level, the charger switches to another phase, which is known as a topping charge.
The correct charging voltage and current are essential for safely charging a battery. You have to calculate the correct charging voltage yourself if you know how many cells in the battery are in series. Each chemical composition has its own charging voltage per cell. Here are the (maximum) charging voltages per composition:
- NMC (Li-ion/LiPo) 4.2V (sometimes 4.1V)
- LiFePO4 3.65V
- Lead/acid AGM 2.37V-2.45V
- Lead/acid GEL 2.41V-2.45V
A Li-ion battery with a nominal voltage (the average battery voltage) of 48V with 13 cells in series (13S) therefore requires a charging voltage of 54.6V.
The other factor besides charging voltage is the charging current. This depends on what the battery can handle. The higher this current, the faster you can charge. It is recommended not to charge a battery or product faster than originally indicated. The data sheet of a battery often states the maximum current allowed. We strongly recommend always staying well below these maximum values.
2.3 What does the voltage indicated on the charger mean?
This is the nominal voltage, or in the case of lithium batteries often the rounded nominal voltage but it will lead to different results of different Wh. See this in Part 1: Batteries, 1.6 Voltage. Different devices require different voltages to charge properly, so it’s important to use a charger with the correct voltage to avoid damaging the device.
2.4 Power of a charger
You can calculate the power of a charger by multiplying the charging voltage by the charging current. In the case of 42V charging voltage and 5A charging current, you are at 210 Watts. So you will have to use a MEAN WELL smart charger of the 240Watt type.
The MEAN WELL chargers are available for different capacities, use different charger series for different application requirements.
Please see below for MEAN WELL charger offering.
- NPB Series
- HEP Series
2.5 Benefits of using a lithium battery with BMS
- Safety: BMS helps prevent overcharging, over-discharging, and overheating, which can improve the overall safety of the battery system.
- Extended Battery Life: The BMS can help optimize the charging and discharging cycles, which can extend the lifespan of the lithium battery.
- Efficiency: BMS helps monitor and regulate the flow of energy, ensuring that the battery operates at its most efficient levels.
- Performance Optimization: BMS can enhance the performance of the battery by maintaining consistent power output and protecting it from damage due to misuse or environmental factors.
- Monitoring and Diagnostics: BMS provides real-time monitoring of the battery’s health, allowing users to identify any issues promptly and take corrective actions.
- Balancing cell voltages: ensure that all cells are charged equally. This helps to extend the battery life and improve its performance.
- Analysing battery data: collect from the sensors to determine the battery’s state and condition and provide real-time information about the battery’s performance
2.6 MEAN WELL “Smart Charger + Lithium Battery”
- Screw mount type of smart charger
| MEAN WELL Charger | Number of Lithium Battery | |
| a | 1pc of NPB-450-48 or NPB-750-48 |
|
| b | 1pc of NPB-1200-48 |
|
| c | 1pc of NPB-1700-48 |
|
| d | 1pc of RPB-1600-48CAN |
|
| e | 1pc of RPB-1600-48CAN |
|
* The charging time depends on the amount of charge current with the selected charger
* C version battery incorporates a connector of M12 (A-coded/5pins), for CANBus communication
* Please contact your local MEAN WELL representative for accessories
* The recommended number of battery is only for reference. Please perform the overall evaluation with the final system.
| No CANBus
Battery-pack has built-in BMS, you can connect it to a power supply(constant voltage) if you only use one battery. |
 |
| with CANBus – M12/A-coded/ 5 pins
It is highly recommended to use this version with CANBus to optimize the charge/discharge current if you connect batteries in parallel |
 |
- IP6X solution
| MEAN WELL Charger | Number of Lithium Battery | |
| a | 1pc of HEP-600C-12 |
|
| b | 1pc of HEP-600C-24 |
|
| c | 1pc of HEP-600C-48 |
|
| d | 1pc of HEP-1000-24W(CCAN) |
|
* The charging time depends on the amount of charge current with selected charger
* C version battery incorporates a connector of M12 (A-coded/5pins), for CANBus communication
* Please contact your local MEAN WELL representative for accessories
* The recommended number of battery is only for reference. Please perform the overall evaluation with the final system.
CONCLUSION
MEAN WELL EUROPE created the platform of one-stop solution for lithium battery and smart charger to help you to shorten the development time & give the added value on your system design. This platform provides many advantages, you will benefit from quick response and the local technical support in Europe for both battery and charger/power-supply. It’s an approach that seeks to optimize the balance between cost and quality from your perspective, to make better decisions about what are the best investments for success.
MEAN WELL has various types of smart chargers and power supplies, from 30W up to 3200W. The lithium battery-pack can be able to communicate with the smart charger via the optimized interface to achieve the excellent performance in the entire solution that customer needs.
Contact us if you have questions on selecting our batteries or chargers.
Learn more about Charger & Lithium Battery
Explore our blog for insightful technical notes about Charger & Lithium Battery Applications.
Got questions?
Look at the section below to find the most frequently asked questions (with answers)
we received in Charger & Lithium Battery Applications.
The GTIN number can be found directly on the www.meanwell.com:
All the latest KNX firmware updates can be found on ETS Online Catalogue or MEAN WELL website dedicated to KNX products.
a. Got to KNX Building Automation Solution-MEAN WELL -> Downloads -> ETS Application Database
b. Click on Download button to see PDF file with all the hyperlink for specific products.
A Surge Protection Device is optimized for a single voltage. Therefore, SPD should be chosen according to the actual operating voltage of the part that need to be protected.Secondly, the voltage protection level shows what is the maximum voltage appeared at output side when a specified surge is coming to the SPD. In general, the lower the voltage protection level, and the higher the discharge or surge current from SPD, means the better protection that the SPD provides.
Enclosed power supplies:
- 35-125W applications: The RD, RT and RQ series provide dual, triple, and quadruple output.
- 150-320W applications: The QP series comes with 4 different outputs.
- 190-240W applications: The semi-potted HDP series provides dual output.
PCB-type power supplies:
- 25-250W applications: The PD and PT series provide dual and triple output.
- 45-200W medical applications: The MPD, MPT and MPQ series offer dual, triple, and quadruple output.
Configurable power supplies:
- 400W fanless, the UMP-400 series is a convection cooled 1U height modular power supply and can provide up to 4 different outputs.
- 450-1000W for ITE applications, MP series provides up to 7 different isolated outputs.
- 650-1200W for ITE and medical applications, NMP series can provide up to 6 different isolated outputs with the NMS single output modules from 3~55VDC. With the NMD dual output module more outputs are possible in the 3~30VDC range. Additionally, the NMP offers a 5V AUX output.
Please also see our “NMP Page”
Desktop-type power supplies:
- 25-50W applications, our GP series is a triple-output type industrial adaptor.
DC-DC modules:
- 1-2W applications, the SMD-type DETN series comes with +/-5, 12 or 15V symmetrical outputs.
- 3-30W applications, the DIP-type DCW, DCWN, RDDW, DKM, DKMW, DKA30 series come with +/- 5, 12 or 15V symmetrical outputs.
- 20W ultra-wide input range requirements, the DIP-type RDDW20UW series can provide a +/-12, 15 and 24V symmetrical output.
- 15W applications, the DIP-type DKE15 series offers a +/-5, 12, 15 or 24V symmetrical output.
- 30W applications, the DIP-type TKA30 series offers a 5V output in addition to a +/-12 or 15V symmetrical output.
- 10-15W applications, the on-board-type NSD series can provide a +/- 5, 12 or 15V symmetrical output.
The number of outputs, the available output voltage range and minimum load requirements are some key aspects to be considered when it comes to choosing a multiple output type PSU.
Basic power supplies in this category have a so-called minimum load requirement. These types of PSU rely on one same internal transformer to provide different outputs. For all outputs to work properly, a minimum current should always be drawn from the main output channel.
See below example how this is shown in the specification for the RPT-60A
More advanced power supplies such as the RT-65A do not have this restriction:
There are two options to select a multiple output PSU: a standard PSU with fixed output voltages, or modular power supplies. Modular PSUs can be personalized according to one’s systems requirements and offer much more flexibility than fixed output voltages PSUs. For instance, our NMP modular medical power supply series come with up to 6 slots for different output voltages from 3 to 55V which can be connected in series and parallel to adapt to each application.
This information can be found back in our installation manual, please visit “Installation Manual-MEAN WELL Switching Power Supply Manufacturer” and select the right product (group) and language.
Yes, CSP-3000 and PHP-3500-HV series both come with an inclusive choice of output voltages (120, 250, 400VDC). Also, our IP67 rated HEP-1000 series can provide DC output up to 100VDC.
All MEAN WELL power supplies come with at least one fuse on the line path1. The internal fuse is designed to handle the nominal current on the whole range of input voltages; for the same power, at low input voltages, the current drawn by the PSU will be higher:
If you want a more adapted protection for a specific input voltage, you could add an external fuse to protect the power supply. Considering that it will only protect the PSU (no other appliances connected after it), you should refer to the datasheet of the power supply and look for the typical input current under your input voltage. The fuse should be rated slightly higher than this current value. The selected external fuse should be a Slow-Blow type, this to avoid it is triggered by the inrush current of the power supply. For reference, most of MEAN WELL power supplies use type-T slow acting fuses.
Further please take into consideration that fuses characteristics are given for an operating temperature of 25oC. Exceeding this value will lower the current rating and shorten its lifetime. Similarly, when operated in cold areas, the current rating will be increased.
Note 1: Except for DDRH-60 series
To download a digital version of our catalog, go to www.meanwell.com
1. Click on Products
2. Click on Downloads
Find our (3) LED driver, our (4) Industrial power and (5) short forms
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Go to:
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1. Click follow
And you could install our APP see our FAQ “How to subscribe to MEAN WELL’s newsletter?”
MEAN WELL’s distributor information can be found on Distributor Network-MEAN WELL Switching Power Supply Manufacturer
- Click on the region that you are located
- Select the country you are in
- Click on the search button
- Scroll down to see our local distribution channels
- Look for the distributor with a tick for the product group that you are looking for
MEAN WELL has the largest distribution network for serving your small and medium demand Power Supplies. You can find all MEAN WELL’s distribution channels on Distributor Network-MEAN WELL Switching Power Supply Manufacturer.
OEM’s which have no sales channel for MEAN WELL products yet can contact us via the “Contact Us” form on this website.
MEAN WELL’s discontinued product schedule and End of Life products are normally updated 2 times per year, in January and in July and are published on www.meanwell.com. See FAQ “Where can I find MEAN WELL’s discontinued product schedule and End of Life information? “
The normal procedure for E.O.L. is:
- The product or series is announced in the Discontinued product list in January or July and announced as NRND (Not Recommend for New Design)
- 6 months later the lead time of the product or series will increase +30 days, the price will increase as well.
- Another 6 months later, the lead time will increase another +30 days (so + 60day compared to the original lead time), the price will increase again.
- Another 6 months later, the lead time will increase another +30day (so +90 days compared to the original lead time) and the price will increase again and additionally there will be a MOQ of 200pcs (and steps of 100 for higher quantities)
- After another 6 months the last buy is announced on the website. This will be the last opportunity to place an order for this product or series.
In total MEAN WELL’s End of Life, procedure will take 2 years. However, there are situations for instance that certification is expired, or some components can no longer be obtained by the market which will force to accelerate the EOL schedule. Therefore, it is always highly recommended from the moment that a product is on the discontinued list to design in one of our new generation products. If need any advice to this, please use the “Contact Us” function on this website.
MEAN WELL’s discontinued product schedule and End of Life products are normally updated 2 times per year, in January and in July. To see the full list, go to www.meanwell.com
1. Click on products
2. Click on Discontinued products for the schedule for the EOL schedule
Click on EOL for the MEAN WELL products which are End Of Life
You can use the “Contact Us” function on this website
MEAN WELL’s website provides you all the basic information about our Power Supplies. This includes company news, product announcements, ISO certificates, Specifications, test report, Certificates, ROHS declarations, Reach declarations and many more.
MEAN WELL’s products can be found on www.meanwell.com
1. Click on products and select the product category
Or in case you already have a part number, you can use the search function on the website:
2. Use the search function on the website to find the right product
3. Fill in the series number in the search field (do not include the last extensions such as -12 in XLG-150-12)
4. Click the search button
5. Click on the PDF icon to open the specification
Owing to line (voltage)-drop, we suggest the extension made from AC cable. In case DC cable extension is necessary, please consider Line-Drop leading to insufficient Vf so that the LED model or lamp may fail to switch ON. Moreover, EMC performance and characteristic may also be affected by DC cable extension.
There are so many MEAN WELL dimming products. How can I make a choice? What are the pros and cons?
First, you have to know your Led lamp specification in order to screen out a suitable Led driver range (Wattage, Voltage, Max Current CC or CV). From those ranges, further check a compatible dimming function. Hereunder is a table to show you the pros and cons of Dimming Function you can find in MW’s catalogue.
MEAN WELL has several charger products, and we suggest choosing them first. Chargers would be more suitable since they are designed for charging applications. Safety and approvals should be taken into account based on the final application. If you are unable to find a proper model in our charger series, our LED CC models can be used as charger. Please choose suitable products after confirming the current and voltage specification on the datasheet of the battery.
3 in 1 dimming circuit would drain 0.1mA per model. Dividing the rated current of the dimmer by the 0.1mA, and we could know how many units can be controlled by one dimming device. For resistance dimming applications, resistance for 100% dimming output would be 100K ohm divided number of models.
A LED strip is normally a Constant Voltage application (CV). For this type of CV application MEAN WELL has design the PWM, IDLV and ODLV series which will allow CV applications to dim.
3 in 1 dimming is the most common application used in LED dimming with the feature that it does not have to work with any specific dimmer. The only thing that has to be verified is that whether the dimmer (1~10V/10V PWM/resistance) is compatible with the definition advised in our specs.
All MEAN WELL chargers are preset for lead-acid batteries. For other products that can customize the charging curve (such as ENC / NPB series), customers can customize their charging curve depending on the charging and discharging characteristics of batteries. If you have other requirements, please use the contact us function on this website.
Noise is directly related to the fan which is built into the power supply. Lowering the airflow of the fan means reducing the heat dissipation ability. It will also influence the reliability of the products. Furthermore, minimum airflow of fans is defined by Safety Organization and a safety appendage will be needed if using a new fan. If fan noise is a critical concern, we suggest to select FANLESS products or contact MEAN WELL for other possibilities according to the conditions of use.
There are two different applications when power supplies are connected in series. One is to generate plus minus voltage, another is to increase total output voltage. Connection methods are as follows:
(1) Connection for plus and minus voltage are shown as follow
(2) To increase the total output voltage (Output current remain the same). Diodes connect in parallel at output side of the driver is necessary to prevent damage during start up. The voltage rating of diode shall greater than V1 + V2(shown as figure below), in addition, peak forward surge current rating shall greater than rated current.
* Because part of the signal ground is shorted with output ground, strongly suggest to use isolated signals to achieve control scheme, in order to prevent damage to the product.
MEAN WELL has launched ENC, HEP-600C, GC, PA, PB, RPB and RCB series for battery charge applications (30~1000W). However, if these models cannot fulfill your requirements, there is an alternative solution. Power supplies with constant current limiting as overload protection are suggested. Charge current varies in battery percentage (full or flat), there is high possibility to trigger overload protection when battery is low, those with overload protection as hiccup or shutdown will stop charging the battery in low battery condition. Yet, using a power supply as charging purpose is considered as overload usage, modification is required. Please Contact Us for the request.
An adaptor may need connection of a power cord to receive energy needed from the utility. You can refer to the specification of the adaptor for the connector (AC inlet) at the adaptor end of the power cord; Different countries/regions vary in type of AC socket and voltage, please look at the table below for the information of the AC plug you need.
MEAN WELL’s LED product specification normally exhibits V-I characteristics. Per the characteristics, there are generally two types of drivers, the “CC” type and the “CC+CV” type. “CC” type of driver is suitable only for LED applications whereas “CC+CV” is for either LED applications or general switching power supply applications. The section that is not suitable for LED applications are represented by dotted line, and based on the protection procedures it can be categorized into hiccup mode and constant current mode; in this section, the tolerance of current is not defined but only the characteristic of current is displayed. If customers attempt not to see a very high current under short circuit conditions, those models with hiccup mode for this section can be selected; if there are applications with motors or capacitive load, those with constant current can be chosen.
There are 2 types of Power Factor Correction circuits; one is Single Stage; the other is Two Stage.
Single Stage power supply combines functions of power factor correction and converter in one circuit but Two Stage use two separate circuits. Compared to Single Stage, Two Stage design is more complex and costly, but the immunity performance of Two Stage power supply against AC mains is much better than that of Single Stage power supply. In addition, Two Stage power supplies manifest better ripple noises performance on output. Owing to that Single Stage is only suitable for fields with quality AC mains but Two Stage can be used in serious circumstances for LED drivers or as industrial switching power supplies.
It is the small unwanted residual periodic variation of the direct current (DC) output of a power supply which has been derived from an alternating current (AC) source. The wave form is shown as figure below.
There are two AC contents, also known as Ripple and Noise (R&N), on the DC output. The first one, coming from sine wave rectification, is at a low frequency which is 2 times of the input frequency; the second one is at high frequency which is from the switching frequency. For measuring high frequency noise, a configuration of an oscilloscope with a bandwidth of 20MHz, a scope probe with shortest ground wire possible, and add 0.1uF and 47uF capacitors in parallel with test point for filtering out noise interference are required.
1. To increase the reliability of the power supply, we suggest users choose a unit that has a rating of 30% more power than actual need. For example, if the system needs a 100W source, we suggest that users choose a power supply with 130W of output power or more. By doing this, you can effectively boost the reliability of the power supply in your system.
2. We also need to consider about ambient temperature of the power supply and whether there is additional device for dissipating the heat. If the power supply is working in a high temperature environment, we need to make some derating to the output power. The derating curve of “ambient temperature” versus “output power” can be found on our specifications.
3. Choosing functions based on your application:
- Protection function: Over Voltage Protection (OVP), Over Temperature Protection (OVP), Overload Protection (OLP), and etc.
- Application function: Signaling Function (Power Good, Power Fail), Remote Control, Remote Sensing, and etc.
- Special function: Power Factor Correction (PFC), Uninterruptible Power Supply (UPS) function.
4. Make sure that the model qualifies for the safety standards and EMC regulations you need.
All MEAN WELL power supplies have an internal fuse except for the DDRH series.
MEAN WELL’s Step files/ 3D files can be found on www.meanwell.com
- Use the search function on the website to find the right product
- Fill in the series number in the search field (do not include the last extensions such as -12 in XLG-150-12)
- Click the search button
- Click on the PDF icon to open the specification
- Click on 3D OUTLINE
- Click on the model XLG-150-3D to download the step file.
