Part Number:UCD9248
In the design tab of the fusion digital power designer, one should set each capacitor's value. For example, if the rail contains 10 capacitors, the position of feedback of voltage is between the first capacitor and second capacitor, should I ignore the other 9 capacitors and only enter the value of first capacitor?
If in my design the output of rail is filtered by pi filter, should I enter the value of inductance? If so how can I enter the value of inductance?
Part Number:BQ51013B
Hello together,
Im new comer to TI's wireless charging chips.
I use a self designed board with the BQ51013B and a custom coil.
C1 and C2 capacitors are calculated as described in datasheet but I dont get it working!
Im using an official TX-Charger but I get absolutly no Output Voltage on the Output pin.
On the RECT pin I can measure a pulsing ~6.5V with 0.5Hz (Beacon?), see attached screenshot from oscilloscope.
Do you have any advice, what I can improve in my circuit to get it working?
Thanks in advance!
Part Number:BQ40Z60
Hello TI team,
After getting a 4S1P battery, powering my custom PCB with a 24V power supply and clicking the charge enable button, the current of the PSU changes from 13mA to 22mA. I expected greater charging current, but after spending some days, I did not get anything,
I attach a screen shot of bqstudio and gg file. What can I do to increase charge current?
Kind Regards,
Carlos
Part Number:LM25118
I am starting a design based on LM25118 and have the following questions
1 > I have space limitation and want to use Ceramic caps in inputs and outputs
2 > it is a processor programmable output from 10V to 27V
3 > Input voltage is 18V to 33V
4 > hi output current up to 9 Amps
Is this the correct part to use any other suggestion would be appreciated
Part Number:LMR62014
Tool/software:TINA-TI or Spice Models
Hello,
I've managed to get the tina schematic for the LMR62014 up and running, but I"m lost as to how to simulate my gain and phase margin. Could anyone point me in the right direction? The circuit seems to be working and the transient analysis shows the supply powering up. I've attached my circuit. (Please visit the site to view this file)
Part Number:LM5155
Hello,
The datasheet and design guide provide some equation to estimate power losses of the MOSFET. Regarding Excel Quick Start Calculator, the parameters to enter are different (Qgd, Qgs, Rg, Gfs, ...). It seems that Rg has a big impact on the MOSFET Power losse in your Excel sheet. Could you provide the equation you use?
Thank you,
JMB
Part Number:UCC29950
Hello.
I'm trying to make 300W AC/DC converter with using ucc29950.
My schematic made according directions from datasheet (pages 36-37). I connected SUFS pin to VCC voltage. VBULK, AC1 and AC2 line resistances are in allowed range. I applied 110V AC Voltage to the input of the schematic, but there wasn't any voltage at PFC_GD pin. When I tried 220V AC, there still wasn't any signal.
At 110V AC there is such voltages at the pins:
1 - GND - 0
2 - GD2 - 0
3 - VCC - 13,2V
4 - SUFG - 0
5 - SUFS - 13,2V
6 - AGND - 0
7 - PS_ON/MD_SEL - 6,8V
8 - VBULK - 520mV
9 - AC2 - 1,04V peak
10 - AC1 - 1,04V peak
11 - LLC_CS - 0
12 - FB - 0
13 - PFC_CS - 0
14 - GD1 - 0
15 - AC_DET - 0
16 - PFC_GD - 0
Could you please help me to resolve that problem? Where am I wrong?
In addition, it will help me a lot if you write pins voltages at normal operation.
Part Number:TPS544B20
Hi Experts,
I would like to know the internal capacitance value of PGOOD. Would you tell it, please? My customer want to know it.
Best Regards,
Fujiwara
Part Number:BQ24640
Part Number:TPS53353
HI everybody!
I have a question about the TPS53353 datasheet.
datasheet：SLUSAK2C.pdf page4
6 Specifications
6.1 Absolute Maximum Ratings
Output voltage range: GND ： –0.3V min. +0.3V max.
What is this mean?
Is this Typo?
What is true?
Remarks:
"TPS53353" has only GND(ThermalPad) Pin.
I don't think of the difference between AGND and PGND.
Please let me know if you have any information!
Best Regards
Shing
Part Number:BQ76PL455A
On the datasheet Pin functions, VP requires a 0.1µF capacitor to AGND and a 4.7µF capacitor in series with a 0.390 ohm resistor to GND.
However I think there is no 0.1uF capacitor in datasheet schematic or EVM schematic. There is only 4.7uF capacitor in series with a 0.39 ohm.
Is it needed 0.1uF capacitor?
Best Regards
Kohei Sasaki
Part Number:BQ76940
Dear TI Experts,
My customer is designed BQ76940 in their project, they find that 0.3% of BQ76940 are broken after all the manufacture process. The phenomenon is impedance between VC0 and GND very small while normal chips are huge. They suspect ESD cause this but they can't find Could you kindly help to review the attached design and give some advices? Thanks a lot.
(Please visit the site to view this file)
Part Number:LM3450
Hi Team,
I have the LM3450AEV120V30 kit, I have a question about that controller:
The Holding current mechanism is the bleeding circuit that sink current from the Dimmer to maintain proper work with Dimmers.
The disadvantage with the bleeder, is efficiency+PF+THD reduces,
When the dimmer in not present, the Bleeding in the LM3450 is still working even though it is not needed (I checked in the EVAL board).
I have a MCU that can detect when the Dimmer in Present or not. I would appreciate to get recommendation how the MCU can disable the Bleeding circuit in the LM3450?
Thanks,
Shlomi
Part Number:TPS2378
1When RJ45 is inserted first,and then HDMI inserted, the TPS2378 is powered OK.
2When RJ45 is inserted first,and then Oscilloscope'GND inserted, the TPS2378 is powered OK.
3When HDMI is inserted first, and then HDMI inserted，the TPS2378 is not powered.
4When Oscilloscope'GND is inserted first,and then RJ45 inserted, the TPS2378 is powered OK.
We used the TPS2378+MP9928(DC-DC) to design.We believe that the external ground line (HDMI/Oscilloscope) interferes with the detection of the TPS2378, but our DC-DC is not isolated. Is there any way to solve this problem?
