LED Driver circuit of 50W 33V 1500mA

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Dear Sir / Madam,

we are in need to develop a constant current LED driver for 50W 33V 1500mA LED lamp. Kndly suggest suitable schematic diagram (circuit), appropriate ferrite core transformer design along with complete berger file using either TOP 247Y or TOP 248Y or TOP 249Y or TOP 256EN Switch.

An early response shall be highly appreciated.

Thanks & regards

Yadav M S

Hi Yadav,
Usually above 20W for lighting application requires with Power Factor(PF) , as such it is more suitable to use LNKSwitch-PH(simple,low component count, more reliable than 2-stage solution). A sample design will be released in our web site for 50W using LNKSwitch-PH with Gerber.

Please watch the overview for LinkSwitch-PL and PH if it is okay to use single stage LED driver in your application. Please send us your remarks if you can use this approach instead of having a non-PF solution.

Regards,
PI-Jono

Hi Jono,
Thanks for valuable advice. We watched overview for LinkSwitch-PL & PH.
Our power output requirement may increase beyond 50W, upto 120W. A non-PF solution is not big problem to our applications, however we may raise P.F. with passive circuit.
You are hereby requested kindly to provide non-PF solution based on TOP-GX Switches.
An early solution shall be highly appreciated.

Regards,

Yadav M S

Hi Yadav,
Please refer to the sample schematic on how to achieve tight output current control. Also attached is the spreadsheet as your reference. You can vary the device size, diode and transformer according to your power level.

You might need to adjust the loop control depending on your application.

Make sure to attach heatsink because your power level is a little bit high.

Enjoy your design!

Regards,
PI-Jono

Hi Jono,
Thanks for your support. Sorry to say that power switching IC TOP269 is not available with our dealer/ supplier of PI component. You are requested to provide schematic/ solution based on either TOP249 or TOP250 or TOP256EN . Inconvenience is regretted.
Expecting an early response.
Best Regards,
Yadav M S

Hi Yadav,
Please refer to the sample schematic using Top-GX as an LED driver. Modify the parts according to your power level and voltage rating.

Our distributor should have the parts, refer to this link for our accredited distributor:http://www.powerint.com/en/company/sales-information/worldwide-sales-reps/distributors

Regards,
Pi-Jono

Hi Jono,
Thanks for providing schematic and transformer design for 50W 33V 1500mA constant current led driver.
Circuit is not functioning properly above 1A current and voltage/current regulated IC TSM1051 is not available locally.
Kindly suggest any simple schematic using transistors or output current regulation.
Expecting a earlier response.
Regards,
M S yadav

Hi Yadav,
For the previous circuit make sure the no load voltage is higher than the actual voltage of the LED in order to get the correct output current. Plus, the schematic I provided is a starting point for your development. You need to adjust some parts values along the way, even the EMI section need to be re-tuned according to your set-up.

Attached is the simpler secondary output current control as reference. Again, you need to recalculate the component to get the desired output current level.

I hope these parts are all available in your area locally.

Regards,
PI-Jono

Hi Jono,

Kindly convert/ modify the attached schematic as

1. TOP247YN based instead of TOP256EN.
2. Transformer ferrite core EE28 based.
3. Output voltage 40V
4. Output Current 1.5A (CC) to drive high power LED Lamp.

An earliest response requested.

Thanks & regards

Yadav M S

Hi Yadav,
Please refer to the attached spreadsheet using the conditions 1 to 4.
Note: EI and EE core cross sectional area is the same, ignore the spreadsheet core size if I selected EI.

Make sure to use the CC feedback circuit that I provided you before.

Regards,
PI-Jono

Dear Mr. Jono 0r Else,
On taking up commercial production of TOP247Y based 33V 1.5A Constant Current Driver as per the schematic attached here with, we are facing the following problems :

1. On power on to the Circuit Board, appropriate voltage about 41VDC appears at output.
2. Some circuits are functioning properly with 50W HP LED load.
3. Most of the circuits go off after about 15 min operation and auto-restart after few minutes.
4. In some cases either diode P6KE200A or UF4007 or both gets open circuit after excessive heat-up.
5. Ferrite Core Transformer gets excessive heat up.

From the above observations, it appears that Ferrite Core transformer design is still not appropriate. Kindly review the transformer / circuit design and suggest solution to the above problems.

Expecting solution / suggestions at the earliest.

M S Yadav

We are waiting for your reply. Please expedite.

Dear Mr. Jono 0r Else,
On taking up commercial production of TOP247Y based 33V 1.5A Constant Current Driver as per the schematic attached here with, we are facing the following problems :

1. On power on to the Circuit Board, appropriate voltage about 41VDC appears at output.
2. Some circuits are functioning properly with 50W HP LED load.
3. Most of the circuits go off after about 15 min operation and auto-restart after few minutes.
4. In some cases either diode P6KE200A or UF4007 or both gets open circuit after excessive heat-up.
5. Ferrite Core Transformer gets excessive heat up.

From the above observations, it appears that Ferrite Core transformer design is still not appropriate. Kindly review the transformer / circuit design and suggest solution to the above problems.

Expecting solution / suggestions at the earliest.

M S Yadav

Hi Yadav,
1. May I know the overall system of your design? Does the power loss in your system is enough to raise the device temperature significantly? You might consider adding a heatsink on the design.
2. How much loss you are clamping on P6KE200A? You might need to reduce your leakage inductance to reduce the loss. Consider sandwiching the secondary. That is having a primary winding then secondary winding and then primary winding.

3. Based on your description, your design is too hot. How the LED mounted on your system? Is it heating up the LED driver? You might consider potting the whole system if you have a limited space.

4. Please monitor your primary input current before shutdown, just to make sure it is not due to saturation.

Sorry for the late reply because I'm in a trip right now.

Regards,
Pi-Jono

Hi Jono,
Thanks for providing schematic and transformer design for 50W 33V 1500mA constant current led driver.
Circuit is not functioning properly above 1A current and voltage/current regulated IC TSM1051 is not available locally.
Kindly suggest any simple schematic using transistors or output current regulation.
Expecting a earlier response.
Regards,
M S yadav

Looking for a alternative part of BP3319MB, Kindly check datasheet and revert me back in case of availability.
http://www.bpsemi.com/uploads/file/20161223093244_271.pdf

45w flyback converter.

Please take a look at LYTSwitch-4 for the 45W flyback design.

https://led-driver.power.com/products/lytswitch-family/lytswitch-4/

We want to develop a 20 Watt LED driver . Input 77 to 135 V DC . Output 16 V 1 amp . Input under , over voltage and output short circuit protection required . Pls suggest a suitable part . Whether LTY 4217 type driver is suitable.

Please check LYTSwitch-5. It is more suitable for DC input than LYT4.

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Hi...i am a new user here. As per my knowledge you should refer to the sample schematic on how to achieve tight output current control. Also attached is the spreadsheet as your reference. You can vary the device size, diode and transformer according to your power level.You might need to adjust the loop control depending on your application

Hi...as per my knowledge you should refer to the sample schematic on how to achieve tight output current control. Also attached is the spreadsheet as your reference. You can vary the device size, diode and transformer according to your power level.You might need to adjust the loop control depending on your application.Make sure to attach heatsink because your power level is a little bit high.