Hi Gene,
It appears that the boost is getting out of regulation and for TPS65105, the design is such the whole device shuts down if any of the rails is out of regulation.
Likely cause of the boost getting out of regulation is boost switch hitting…
Hello Damien,
Noise coupling, if it is large enough, will cause the TPS65100 device to shutdown due to being out of regulation as detected at feeback node. Another device in the same family, TPS65101 does not have a shutdown when FB is out of regulation…
Other Parts Discussed in Thread: TPS65101 Hi,
I'm using TPS65101 to power a LCD screen. I found black edge appeared on the screen(shown as below). The black edge area would be larger with time lasts. Finally, the whole screen would be totally black…
Other Parts Discussed in Thread: TPS65101 Customer asks:
"I'm having my board assembled with the device TPS65101. I need to adjust the increase the timings of positive charge pump O/P by few milliseconds from Negative charge pump.
Please let me know…
Part Number: TPS65100 Tool/software:
Hi,
facing issue with TPS65100, after making device switch On , after couple of minutes ----boost converter voltage suddenly drop to 5V
followed all standard layout guidelines
1. i have tried with change in…
I see 2.5V in the Base pin of TPS65105, while the npn transistor is removed.
Also from TPS65101 architecture, could see the Base pin driven by internal switch "Q10"
Hello Kushal Shah,
Please check the following:
1. Disconnect the panel and check if the outputs are then ok.
2. Measure as above the moment when the outputs shut down after startup. It might be possible to check why the protection of the IC is triggered…
Hello Cemal,
Yes, the part can be used with 3.3V. Please check the protection feature of the part. If your system does not need this feature I recommend usint TPS65101. This is exactly the same part without this specific feature.
Best regards, Br…
Hello k_nov,
It is true that you can derive the VCOM signal from the source line signal and for the big portion of your VCOM signal this is done with the resistors connected from VDD and VGL to A+in. Then it is good practice and increases the functionality…
