This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Recently I bought several LM2587-ADJ/NOPB, and now I meet some problems with application provided by datasheet.
Input 6V, 1A, DC source. The output side we connect 100ohms power resistor.
Actually, the circuit behaves well with no load, the output voltage is exactly like what we set 12V. However, as 100ohms resistor connect to the output side, the output voltage drop significantly, like 6-8V, and sometimes the chip gets hot and burns out.
Ask for help! How to set the output voltage when we get a load.
In reply to Marc Davis-Marsh:
for the load 330R (the current is 106mA), the circuit is working fine. Switch ON and OFF, no problem. Please check the waveform.
In reply to Zhongwen Jin:
For the issue of turning on with the load. I think the combination of your large output capacitor and the 51ohm load is causing your input supply to crash during startup.
Your input supply has to charge up both the input caps, output caps and load during start up, and if it doesn't finish ramping up before the part starts switching and drawing even more current it can collapse.
Try reducing your output capacitor from 1200uF to 220uF or 330uF.
Try this and then we can see if we can optimise your performance.
I have tried 470uF and 110ohms at the output end. But the circuit fails to turn ON with this load.
I am not sure where is wrong in my circuit. Basically I am doing a circuit in the datasheet. Please see the picture below. It says 36V @ 2A. Rightnow, i can only get 212mA working while using a 165ohms load.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.