Part Number: LM5143DESIGN-CALC Other Parts Discussed in Thread: LM5143-Q1 Hi, Team,
Please let me confirm about "Effiency/Power Loss Analyzer shown in IM5143-Q1 Quickstart Design Tool. In the section of "Effiency/Power Loss Analyzer" in the file,…
Part Number: LM5069QUICK-CALC Other Parts Discussed in Thread: LM5069 Dear TI support team,
for a high-power design, we use 2x parallel FETs on the LM5069 to transport the load current. Output capacitance is >2mF, so a dV/dt soft start becomes necessary…
Hello Biswajit,
Thanks for your interest in TI FETs. In the conduction loss equations, the inductor RMS current is multiplied by D, duty cycle, for the high side FET and multiplied by (1 - D) for the low side FET. This is because the high side FET conducts…
Part Number: LM5170 Hi,
where i can find power loss calculator that give the optimaze componnents and high efficiency?
can i simulate the LM5170 in the webbench?
Thank you.
Ilan Mazuz.
Hi Keshav,
Thank you for reaching out. Please note that the LMR514430 is a synchronous buck namely it employs an internal low side FET as the rectifier to replace the regular freewheeling diode, while the LMR14030 is a nonsync buck which does not have…
Hello Bhuvaneshwari,
I used an excel-based load switch tool available at the link below to calculate the conduction losses in the FETs. This tool does not allow for paralleling FETs but you can simply divide the current by the number of parallel FETs…
Part Number: CSD18510Q5B Hi,
I'm trying to predict the losses in DC-DC converters using only datasheet information where possible. One of the parameters that I haven't had much luck with is the Qrr/Trr related losses.
In most datasheets, the…
Thanks for the response Stefan! I'm trying to understand this circuit a little better, so if you don't mind, I have some follow up questions. So that equation covers the body diode losses during the deadtime, but isn't there some switching losses…
Part Number: LM25069QUICK-CALC Other Parts Discussed in Thread: CSD17553Q5A , TPS25982 , LM25069 Hi team,
Could you please comment on how to determine the desired max. FET power limit if engineers choose CSD17553Q5A? 3.1W?
Considering the current accuracy…
Hi Bob,
Apologies for the delay.
Here are some comments:
You may want to use different high-side and low-side FETs (depending on Vin, Vout and where optimization should occur in the Vin range). Use the quickstart calculator in tandem with the NexFET…