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Hi,
I am debugging one AC-DC quick charger from last week. I saw a general feedback circuit using TL431 common in all AC-DC converters.
This is what i found in my board(Please see the figure). I want to know how capacitor C1 works in this Circuit. If we dont give that capacitor C1 then we didnt...
Hi,
The circuit is like mobile charger.. same transformer methodology is used here i think (see REPEATED HIGH-VOLTAGE ISOLATION TESTING)
So there may be direct impact on the xformer out by VIN, also the ratings of components is crucial.. Datasheet is not talking about whats inside..
You know...
Hi,
Do any one know why VOH is not provided in the datasheet shown below?..
Or can i assume VIH and VIL as VOH and VOL respectively...?
https://www.ti.com/lit/ds/symlink/tca9509.pdf
Hi Guys,
Thanks for replying.. Im not trying to learn the HDL language. In software perspective, I just only want to know whats happening there. All I want to know the hardware perspective. Im able to learn the configuration thing of FPGA. since the datasheet is very huge, as beginner I cant...
Hi
Let me check on FPGA manufacturers..
I did some basic search in google i didn't find any one. all documents talking about software RTL codes etc. but i need configuration, interfacing like these
You have to select the spec "clamp voltage" which is the maximum voltage allowable on that rail. Breakdown voltage is below than that..
Please go through the link..
https://www.semtech.com/uploads/documents/tvs_diode_selection.pdf
**broken link removed**
- - - Updated - - -
Your device...
Hi,
First you have to read the pcb layout guidelines in the datasheet on page number 43. Then do the proper layout according to that.
The signal routing under the die is prohibited here. Please avoid all signal routing under the IC. You can give heat sinking pad on PCB
for exposed pad and its...
Hi,
The PL2303 can also work in 3.3V TTL level. Cut the 5V connection and connect it to 3.3V level using jumper in PL2303.
Once again verify the baud-rates.. I think the SIM800 doesn't need power from PL2303 (Need to verify that)
Hi,
Yes, I agree with that. this is not the recommended charging method. But it is not that much dangerous. We have done it several times. If careless then it will be a problem.
Only point to be noted that we tried only for 4.2V range batteries, not in 12V ones.
What we do is,
1. check with the...
Hi,
For lithium ion batteries, we usually connect the battery to a bench power supply by setting the proper voltage and current. For eg. for a li ion 3.7V battery, the full charge voltage is 4.1V. After setting the 4.1V and proper current on bench, connect the battery directly. So when the...
Hi proto,
While taking power from USB or adapter through VIN pin, it works and gives 5V. Now I Im testing with a single 2600mAh battery through VBAT pin. Let me check with powering from a bench. Thanks for the info.
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