Forum Post: LLC Resonant Converter
Good morning,I have a few questions for Mr Hong Huang.Can you please show us how you mathematically derived your equation for Ln? Ln = [(m+1)^2/(2m+1)] -1Your curves in the Excel Design Sheet has been...
View ArticleForum Post: Quick question about the MC34063
What kind of caps (for the timing capacitor and output cap) are recommended for use with the buck regulator circuit? I am trying to bread board this up first to grasp the concepts here so would...
View ArticleForum Post: Output capacitor for TPS54372
I would like to know the output capacitor for TPS54372.The customer will use TPS54372 with +/-(sorce/sink) 0.5A.And they want to reduce capacitance value for output capacitor (ex. 56uF*2 or 56uF*1).In...
View ArticleForum Post: RE: TPS2511 Charging
Eric, One more question. I looked at PWR_TPS2511_Overview.pptx Foils in ESP, and I found the following.Divider 1 (5W) mode; - iPhone Fast Charge - Slow Charge (1A) to iPad/iPad2 - Slow Charge...
View ArticleForum Post: TLC5916 output state retention issue.
Hi,I am using two cascaded TLC5916 chips to drive 12 LEDs, mixed green and red. this is a very straight forward task, which doesn't require brightness control or anything like, just turning on LEDs...
View ArticleForum Post: PCB Design guideline for BQ24002PWP battery charging Circuit
Hi.. all I am using BQ24002PWP for Li-Ion battery charging purpose.i need PCB layout for same circuit. Actually i don't understand how to make layout for Thermal Pad which is specified in the datasheet
View ArticleForum Post: hi
Any of you can suggest me an IC to design a battery charger for battery rating of 60 V, 120 Ah, lead acid. using CC and CV method ?
View ArticleForum Post: RE: TPS63060 – About abnormal behavior and a dischage function...
I have three questions.Is body diode the parasitism diode of the IC?Does the following condition happen with high probability?In the following condition, what kind of adverse effects are there to...
View ArticleForum Post: TPS81256 input capacitor
Hi,The spec sheet for the TPS81256 states that in most applications an external input capacitor is not needed (since there is already a built-in one). However, the TINATI transient model for this chip...
View ArticleForum Post: RE: EV2300 and Windows Xp 32bit
Hi Tom,Thank you for your advice.Now it works as charm. (Note, need to delete the Chemistry subdirectory before running the updater).The current location for the Chemistry Updater...
View ArticleForum Post: RE: DFF flag set
I thought I'd share some experience with DFF. On a 20Z45 pack, we encountered DFF because the system host issued a reset and immediately tried to access dataflash. The reset was part of a host...
View ArticleForum Post: CSD25401Q3 PCB Trace Widths
It's awesome that these guys can funnel so much current for such small packages. It seems like the traces widths (found by using calculators online) would need to be huge to be able to handle the...
View ArticleForum Post: RE: TPS61016DGS external supply at Vout
May I ask why you chose the TPS61016? It is a very old device. There are many newer options that are better. The power quick search at power.ti.com can help you find them.1. I would not recommend...
View ArticleForum Post: RE: BQ20Z75 Remaining Capacity, Remaining time to Empaty and...
Hi Tom,I coudnt find cell part number in that spreadsheet.Suppose if I buy new cell what should I consider to match ChemID with TI BqEasy Software?What should I mention to manufaturer?I am planning to...
View ArticleForum Post: RE: Is the PMP8372 reference design available for purchase?
The website is being updated. They should be available soon.In the meantime, send me an email with your contact info and your shipping address.Thanks, Jasonjarrigo@ti.com
View ArticleForum Post: RE: LP2983 as drop-in replacement for LP8358
Yes, this seems to be an appropriate choice.Critical frequency is just below the 0db loop gain frequency, otherwise I go with100kHz.
View ArticleForum Post: RE: TPS65217C [POWER SUPPLIED THROUGH BAT PIN]
The Wakeup events are:AC risingUSB risingPB_IN fallingBAT rising is not a wakeup event. In this case, the PMIC would remain in the OFF state until a wakeup event occurs (such as pressing the push...
View ArticleForum Post: RE: TPS5450DDA exhibits poor step load transient response
That is a very fast transient, 100x faster than what I usually test. You can estimate the the charge that is removed form the output during that time and how much capacitance is required to keep the...
View ArticleForum Post: RE: TLV70018 Ground Current
Hi Su,Thanks for your reply.My impression is that in general, the efficiency of a LDO is Vout/Vin, if you ignore the small ground current (or current drawn by the LDO internal circuit). Looking at the...
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