#LED power supplies

[jan2mildi]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/xi180c180v144bsf2-signify-north-america-2124577

Lighting Solutions, LED Light Modules, led driver replacement, LED driver IC

100 - 277Vac, 180W, 100 - 1800mA, 50-144V, [0-10V], IP66 LED Driver

[athy2nleyy]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/ledinta0024v41flo-signify-north-america-4772364

Led driver circuit, short circuit protection, high power led driver

Xitanium 100 W 4.16 A 24 V Output Max UL Class II Outdoor LED Driver Module

[teardownit]

We've created a controlled resistive load. But why?!

But for real, why? After all, there are many ready-made devices for this role. And even if you do make one, everyone knows that the best option is an active load, which allows one to determine many useful performance characteristics... So, why?

One day, we needed to test a large group of power supplies of different types.

We would use East Tester ET5410A+ as a test load, which was purchased for this purpose. But it turned out that its dynamic characteristics were so poor that some power supplies simply refused to turn on, assuming this load to be a short circuit. At the same time, this device was suitable for sustained tests.

So, we're running out of time and urgently need to find a 600 W controllable load unit to test 24 V power supplies. With no room for another error and a near-zero budget (of course, a zero budget is an exaggeration, but not a huge one), we've chosen a way to solve such a problem with a guaranteed result—a switchable resistive load. We've also decided to make it ourselves.

It seemed convenient if the load block would be controlled by PieBridge and powered by it at 5 volts. We designed a circuit:

In this circuit, the load consists of eight parts, the resistance of which is equal to Rn=1.875×2^n, where n=0..7. These parts are switched using MOSFETs Q1-Q5, controlled by a 74HCT595 shift register. Heat is removed by forced cooling with a fan, which is automatically turned on whenever the outputs of the 74HCT595 register are in active mode. The value of 1.875 Ohms for the MSB was chosen to obtain the weight of the LSB equal to 0.1 A and also to ensure that the primary set of load elements is assembled with standard-value 120 Ohm resistors (SQP 5W resistors are used). The load of the two most significant (and most powerful) bits is made of Nichrome 80/20 strips. SH8KB7 transistors are used to switch parts of the load. Instead of SH8KB7, one can use AO4838 or AO4884, but Q5 may need a heatsink in this case.

The boards were milled:

Assembled the board with triggers and controls:

Put together boards with load resistors:

Fitted all the boards into the box casing:

Installed Nichrome 80/20 strips using high-value resistors:

We wired up the fan to the box and connected it to the Raspberry via PiBridge:

And we're all done:

A small script was written to control the load, implementing both static and dynamic modes of load operation:

####

Note: The script uses GPIO from the PiBridge kit [link].

[dviid2oya]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/psb50w-1200-42-erp-power-4119800

LED driver chips, Dimmable LED driver circuit, LED Lighting Components

100 - 277Vac, 50.4W, 600 - 1200mA, 28-42V, [0-10V, TRI...], IP20 LED Driver

[wliw2dina]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/psb30w-0700-42-erp-power-2119366

LED Lighting Components, LED control systems, High power LED driver

100 - 277Vac, 29.4W, 350 - 700mA, 28-42V, [0-10V, TRI...], IP20 LED Driver

[stvn2lmes]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/psb30w-0700-42-s-erp-power-4123575

Adjustable constant current led driver, Constant current LED driver replacement

PSB30W-0700-42-S

[matrixfinishes]

Introducing GDS slim body power supplies specifically designed for signage and display boxes. These sophisticated electronics are built to ensure extended longevity while fulfilling constant current and voltage requirements. With our power supply for signage, you can expect top-notch performance and reliability. Trust GDS for your power solution needs in the signage and display industry.

[tviss2msy]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-current-acdc-led-drivers/ess010w-0500-18-erp-power-3119364

Led driver power supply, LED Dimming Modules, LED driver replacement

100 - 277Vac, 9W, 500mA, 10-18V, [0-10V, TRI...], IP64 LED Driver

[ryuki-blogs]

Power indicator on the laptop: doesn't turn on when connected

Me: skipping all stages of grief directly to acceptance but trying the power button anyway

Laptop: turns on like normal

Me:

[guss2itth]

https://www.futureelectronics.com/p/semiconductors--Led-lighting-components--led-driver-modules-rev--constant-voltage-acdc-led-drivers/vlm100w-24-erp-power-6095001

LED driver power electronics, Dimmable led driver, embedded intelligence

100 - 277Vac, 96W, 24V, IP20 LED Driver

[mllebleue]

New tv. We have to test it on something good, of course.

[energexae]

Energexae - Your Trusted Partner for Meanwell SMPS Power Supply in the UAE

In the ever-evolving landscape of electronics and power solutions, finding a reliable and efficient Meanwell SMPS Power Supply provider is crucial. Energexae emerges as the go-to choice for businesses and individuals seeking top-notch power supply solutions in the United Arab Emirates (UAE). With a commitment to quality, efficiency, and customer satisfaction, Energexae stands out as the best Meanwell SMPS Power Supply provider in the region.

Unparalleled Quality: Energexae sets itself apart by delivering Meanwell SMPS Power Supply units of unparalleled quality. Each product undergoes rigorous testing to ensure it meets the highest standards. This commitment to quality ensures that customers receive reliable and durable power solutions, making Energexae a trusted name in the industry.

Extensive Range of Products: One size does not fit all, especially when it comes to power supply solutions. Energexae understands the diverse needs of its customers and offers an extensive range of Meanwell SMPS units to cater to various applications. Whether it's for industrial machinery, LED lighting systems, or electronic projects, Energexae provides a tailored solution to meet specific requirements.

Efficiency and Sustainability: In a world where energy efficiency and sustainability are paramount, Energexae's Meanwell SMPS Power Supply units shine. These power supplies are designed with a focus on energy efficiency, reducing waste and minimizing environmental impact. Businesses can not only enjoy cost savings but also contribute to a greener and more sustainable future.

Reliability in Every Watt: When it comes to power supply, reliability is non-negotiable. Energexae ensures a stable and consistent power flow, preventing disruptions and downtime. This reliability is crucial for businesses that rely on uninterrupted power for their operations.

Customer-Centric Approach: Energexae places a strong emphasis on customer satisfaction. The company's customer-centric approach is evident in its dedication to understanding the unique needs of each client. Whether you're a small business or a large industrial enterprise, Energexae takes the time to provide personalized solutions and support.

Industry Expertise: Backed by years of experience in the power supply industry, Energexae's team brings unparalleled expertise to the table. Their in-depth knowledge allows them to stay ahead of industry trends and offer cutting-edge solutions that align with the evolving needs of their customers.

Conclusion: In a market flooded with options, Energexae emerges as the leader in Meanwell SMPS Power Supply solutions in the UAE. With a focus on quality, efficiency, and customer satisfaction, Energexae is the trusted partner for businesses and individuals looking to power their electronic devices reliably and sustainably. Choose Energexae for the best-in-class Meanwell SMPS Power Supply units and experience the difference that quality and expertise can make in your power solutions.

[teardownit]

Review, teardown, and testing of RSP-150-24 Mean Well power supply

General description

A short description

The RSP-150-24 is a universal input power supply with a constant output voltage of 24 volts and a current of up to 6.3 amperes. According to the specification, it has an operating AC input voltage range of 85 to 370 volts without manual switching. The supply measures close to 7.8 × 3.9 × 1.2 inches (199 × 99 × 30 millimeters) and is made on a printed circuit board fixed to the base of the metal case, designed to operate with passive cooling. The top lid covering the case is perforated.

The power supply has an LED indication for the output voltage and allows one to adjust it within -5 to +10%. This unit does not have either PFC or thermal protection.

Design description

The input and output circuits of the power supply are connected to a common screw block (1). From left to right, there are three terminals for the input line, neutral, and ground wires, and two parallel blocks of two terminals for the outputs: ground and +24V.

The input voltage from the screw terminals is supplied to the RF interference filter (2) and through the fuse (3) to the diode bridge (5). Next, the rectified voltage is supplied to the active PFC, controlled by the PFC+PWM controller FAN4800 (4). The power part of the PFC is assembled using a MOSFET 19NM50N (6) and an 8A 600V ultrafast diode STTH8S06D (7). The output voltage from the PFC is supplied to the two-transistor forward converter, whose transistors, 14NM50N (9), are controlled by the same controller, FAN4800. The converter voltage from the transformer (10) is supplied to the rectifier and to the LC filter (13, 14). The output rectifier is made using MBR20150 diodes (12). The filter output capacitance is 470 uF, 35 V, designed for operating temperatures up to 220F (105C) (14).

General stabilization control is performed by the AP4310 chip. The control signal is transmitted from it to the high-voltage part of the circuit through a transistor optocoupler (15). One optocoupler serves as the main regulation channel, the second forms a backup channel for overvoltage protection (OVP), and the third provides reception of a remote control signal.

To limit the inrush current, there is an NTC (18) connected to the output stage of the rectifier bridge (5) near the boost inductor PFC.

The rectifier bridge (5), transistors, and diodes (6, 7, 9, and 12) are pushed against the housing with screws using overhead metal strips. Between the aluminum case and the board (from the solder side), there is an extra insulation layer, a thin sheet of fiberglass. All bulky components are additionally fixed using compound.

Build quality is good.

Test conditions

Most tests are performed using Metering Setup #1 (see appendices) at 80F (27C), 70% humidity, and 29.8 inHg pressure.

The measurements were performed without preheating the power supply with a short-term load, unless mentioned otherwise.

The following values were used to determine the load level:

Output voltage under a constant load

The high stability of the output voltage should be noted.

Power-on parameters

Powering on at 100% load

Before testing, the power supply is turned off for at least 5 minutes with a 100% load connected.

The oscillogram of switching to a 100% load is shown below (channel 1 is the output voltage, and channel 2 is the current consumption from the grid):

The picture shows three distinguishable phases of the power-on process:

1. The pulse of the input current charging the input capacitors when connected to the grid has an amplitude of about 4.5 A and a duration of about 5 ms.

2. Waiting for the power supply control circuit to start for about 50 ms.

3. (Output Voltage Rise Time) Output voltage rise takes 6 ms.

(Turn On Delay Time) The entire process of entering the operating mode from the moment of powering on is 61 ms.

(Output Voltage Overshoot) The switching process is aperiodic; there is no overshoot.

Powering on at 0% load

The power supply is turned off for at least 5 minutes before the test, with a 100% load connected. Then the load is disconnected and the power supply is switched on.

The oscillogram of switching to a 0% load is shown below:

The picture shows three distinguishable phases of the power-on process:

1. Charging the input capacitors when connected to the grid has an amplitude of about 1.5 A.

2. Waiting for the power supply control circuit to start for about 27 ms.

3. (Output Voltage Rise Time) Starting the converter, increasing the output voltage, and entering the operating mode take 4 ms.

(Turn On Delay Time) The entire process of entering the operating mode from the moment of powering on is 31 ms.

(Output Voltage Overshoot) The switching process is aperiodic; there is no overshoot.

Power-off parameters

The power supply was turned off at 100% load, and the input voltage at the moment of powering off was nominal. The oscillogram of the shutdown process is shown below:

The oscillogram shows two phases of the shutdown process:

1. (Shutdown Hold-Up Time) The power supply continues to operate due to the input capacitors holding charge until the voltage across them drops to a certain critical level, at which maintaining the output voltage at the nominal level becomes impossible. The phase takes 20 ms.

2. (Output Voltage Fall Time) Reduction of the output voltage, stopping voltage conversion, and accelerating the voltage drop take 6 ms.

(Output Voltage Undershoot) The shutdown process is aperiodic; there is no undershoot.

The current waveform at 100% load right before shutdown is close to sinusoidal with an amplitude of 2 A.

Output voltage ripple

100% load

At 100% load, the low-frequency ripple is approximately 15 mV.

At 100% load, the ripple at the converter frequency is approximately 50 mVp-p, and the noise is 70 mVp-p.

75% load

At 75% load, the low-frequency ripple is approximately 10 mV.

At 75% load, the ripple at the converter frequency is approximately 20 mVp-p, and the noise is 30 mVp-p.

50% load

At a 50% load, the low-frequency ripple is approximately 6 mV.

At 50% load, the ripple at the converter frequency is approximately 30 mVp-p, and the noise is 50 mVp-p.

10% load

At a 10% load, the low-frequency ripple is approximately 10 mV.

At a 10% load, the ripple at the converter frequency is approximately 30 mVp-p, and the noise is 50 mVp-p.

0% load

No-load current consumption measured with a multimeter: 29 mA.

(Power Consumption) The first assumption of excessive standby power draw of more than 6.5 watts is wrong, since the current in this mode is predominantly reactive. Indeed, the input filter in the circuit contains two capacitors with a combined capacitance of 1.5 μF.

Measuring the exact active power consumption at a 0% load with a basic set of instruments (oscilloscope, multimeter, etc.) is not possible.

At 0% load, the low-frequency ripple is approximately 2 mV.

At 0% load, ripples at the converter frequency are masked by the 80 mVp-p noise.

Dynamic characteristics

To evaluate the dynamic characteristics, a mode with periodic switching between 50% and 100% load was used. The oscillogram of the process is shown below:

It is clear that the power supply, when the load changes abruptly, allows for a slight dampening overshoot; the magnitude of the response to load changes is about 260 mV.

Overload protection

The claimed protection type is "constant current limiting, recovers automatically after the fault condition is removed." This was confirmed during testing. When the output is overloaded or shorted, the unit goes into current stabilization mode and automatically restores operation when the overload goes away.

The output current for the overload protection to kick in is 7.9 A.

Input circuit safety assessment

(Input discharge) Safety assessment is based on the discharge time constant of the input circuits when disconnected from the grid; the value is 0.126 s. This means that when operating on a 120 V input voltage, the time required to discharge the input circuits to safe values (<42 V) will be 0.2 s:

Important: The result is valid for this particular power supply unit; it was obtained for testing purposes and should not be taken as a safety guarantee.

The leakage current at the ground pin is 24 µA.

Thermal conditions

When operating with no load connected, no component overheating had been noticed.

Thermograms were captured at three power levels: 80, 90, and 100%, fully assembled and with the lid removed. Thermal images show that the most loaded element of the block is the input thermistor (NTC), and its heating seriously stands out against the background of all the other components. At 80% load, it heats up to 220F (104CC, 140F above ambient temperature). At 90%, it's 221F (105C, 141F above ambient), and at 100%, it reaches 236F (108C, 156F above ambient).

80% load

90% load

100% load

Conclusions

RSP-150-24 generally has little noise and ripple, the output voltage is maintained accurately, and the build quality is solid.

The dynamic characteristics of this unit aren't great; when the load pulses, the power supply can't adjust itself in time. This results in quite noticeable spikes and overshoots.

For long-term operation, the load should be limited to 70–80% of the nominal one., especially during the hot season when ambient temperatures reach 95F (35C) or more.

Important: The results are valid for this particular power supply unit; they were obtained for testing purposes and should not be used to evaluate all the units of the same type.

[supertrader123]

Led modules and power supply

Super Traders is a trading company in Delhi NCR. It is a retail store for different outdoor and indoor advertising products like banners, roll up stands, sun boards, display boards, wall graphics and many more. Top brands like Innox, Innotex, Printex, Adverr are some of the partner of Super Traders. It is one of the best trading company in Delhi NCR with high quality products and affordable prices. For exploring more you can visit: 91-783860006

[led-driver-ottima]

Triac dimmable Electronic Transformer Junction Box series

[eagerled]

Is A Sending Card Always Necessary on the LED Screen?

LED displays are now very well-known and widely used with audiences engaging on big screens in stadiums, billboards, and sometimes, street art. But, there appears to be a myriad of parts that are clustered together for it to work in unison. One of these components which is the sending card has in the past been crucial in the running of the LED screen. However, with advancements in technology, the question arises is a sending card always necessary?

The Sending Card: A Crucial “Translator”

In most LED displays, the sending cards act as a bridge between the content source (like a computer) and the LED screen itself. It receives the video signal (HDMI, DIV, etc.) and translates it into a format the screen can understand. This involves processing the data, splitting it into individual pixel information, and synchronizing the output to ensure a clear and cohesive image on the screen.

Advantages of Streamlining the System

Companies like Kystar, a leading innovator in LED technology, are pursuing the boundaries by developing systems that can potentially eliminate the need for dedicated sending cards. Through advancements in computer processing power and software optimization, these systems can handle the conversion task directly within the computer itself. This can offer several advantages:

SimplifiedSetup: Eliminating the sending card reduces one component in the system, streamlining the setup process for users.

CostReduction: By removing the need for a separate hardware component, the overall cost of the LED display system can potentially decrease.

EnhancedFlexibility: Integrating the sending function into the computer allows for greater flexibility in terms of content management and display options.

When is a Sending Card Still Relevent?

While the potential to bypass sending cards exists, their role remains valuable in certain scenarios.  Here is when a sending card might still be the preferred choice:

ComplexDisplays: For intricate LED setups with high-resolution screens or multiple connected panels, a dedicated sending card can offer better processing power and ensure smooth, synchronized visuals.

LegacySystems: For existing LED displays that rely on older technology, a sending card might be necessary for proper compatibility and functioning.

Advancedfeatures: Some sending cards offer advanced features like scaling, colour correction, and scheduling functionalities, which might not be readily available through a computer alone.

At Eager LED, we offer a comprehensive range of LED display solutions, including options with and without dedicated sending cards. Our knowledgeable team can help you enhance your specific needs and recommend the optimal configuration for your project.