The first letter "S" of top marking in Picture 1 and Picture 2 are different.
Are these 2 types of "S" normal? Any document to prove this change?
Anyone can help to advise the difference?? Thank you for your…
The first letter "S" of top marking in Picture 1 and Picture 2 are different.
Are these 2 types of "S" normal? Any document to prove this change?
Anyone can help to advise the difference?? Thank you for your…
Why LM5050MK-2/NOPB have below nonconformities？ Pics attached.
DC:2101+5 COO:MALAYSIA
1.The parts look sande and have a layer of additional paint
2.The markings failed the acetone test
Hi, expert
My customer is using two LM5050-2 with two batteries to provide power supply to system, but they found the two batteries will discharge alternately. They want one battery discharge fully then another starts to discharge…
Can Ideal Diode controller or ORing Controller used to control MOSFET as a high side switch or load switch?
RELATED PRODUCTS: LM74700-Q1, LM5050-1 and LM5050-2
Thanks Praveen,
Yes, In the image I am only passing current from Right to Left, so the back-diode of the high side NFET will not conduct. This is not very clear in my drawing since the "IN" pin is on what I would consider the output (load side…
Hi Hattori,
Yes, you can parallel MOSFETs for high current usage.
The only concern would be delay in Turn ON and OFF time of the FETs due to increased Gate capacitance. In case you want faster gate turn ON and OFF, you can consider using LM74700-Q1 …
Hi,
My customer has already used LM5050-2. However, external FET, connected with LM5050-2, is too hot. So he considers using external FET in parallel. Can LM5050 connect/drive…
Hi Rakesh
Thank you for introduce TPS23523. I will try to use it for new design.
Best Regards, Jinlong
Hi Jinlong,
Can you please check TPS23523 and let me know.
Best Regards, Rakesh
lm74700 can not be used when input voltage higher than 48V. There is no option that use LM74700 device for my application.
Do you have some recommended device and circuit that is already used by someone and passed the lighting surge test for -48V input…
Hi Jinlong,
I understood the meaning and reason of 2A peak gate turn off current. The gate of MOSFET will be safe because it is sink current to LM5050-2.Right?
Yes, it is safe.
With LM5050-2 should be configured as per Figure 25 for input reverse polarity…
Hi Rakesh
I understood the meaning and reason of 2A peak gate turn off current. The gate of MOSFET will be safe because it is sink current to LM5050-2.Right?
another question:
If I want to design a circuit that can protect rest of circuit from input shorted…
Hi Jinlong,
When reverse current flows in the path, the controller turns-OFF the FET quickly with 2A GATE sink current. Under this condition, the energy stored in the parasitic wiring inductances will be transferred to the rest of the circuit. As a result…
Hi Rakesh
Do you mean Figure 24. Typical +48V Application with Transient Protection?
as the figure 24 is use for protect pin in and out when input is shorted, Do you mean that the gate turn-off peak current will reach 2A in this moment?
So could you tell…
Hi Jinlong,
Please use schottky and TVS diodes as per Figure 24 in the datasheet.
Best Regards, Rakesh
Hi Rakesh
I want to use LM5050-2 for -48V power supply. Please tell me what circuits is needed to prevent the N-channel MOSFET damage when gate turn off peak current reach 2A . I think some circuits is needed for protect the gate of MOSFET. Do you agree…
Hi Jinlong,
"2A Peak Gate Turn-off Current" is the pull-down strength of the gate circuit during turn-off under reverse current condition.
Can you let us know under which test condition the damage happened.? It is only the FET or FET + controller…
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