Part Number: BQ76PL455A-Q1
Tool/software: Code Composer Studio
Hello,
I wonder working principle of BQ76PL455A-Q1. Questions that I have in my mind are:
1. Does it need to be configured before use ?
2. Does it automatically measures voltage current and temperature and transmit data by UART.
3. How can we configure GPIO pins of related chip ?
4. Can I use same chip with a PIC microcontroller without any configuration? If so, does BQ76PL455A-Q1 send automatically data to PIC?
Thanks.
Part Number: BQ40Z80
Tool is bqstudio1.3.86, select Bq40z80 to enter, chemical ID is not 705,.But select Bq34z100G1 to enter, and you will see chemical ID 705.
May I ask what is going on? How can I select chemical ID 705 using Bq40z80? Thank you.
Part Number: LM76002
Hello,
I want to purchase LM76002RNPR but is not available in mouser, digikey lead time is 6 weeks.
In those websites LM76002RNPT is available, Can you tell me what is difference between these two?
Can i purchase LM76002RNPT instead of LM76002RNPR this?
Part Number: TPS54560
We are facing temperature raise issue while output current is 3.2A , input & output ratings are given below.
Input voltage - 32 V ,Output voltage - 5V, Load current - 3.2A continuous load
The entire PCB temperature is raised to greater than 90 deg C when the ambient temperature is 30 Deg.C.
I am really worried about component degradation due to temperature stress.
We were using thermal pad and same was connected with ground.Refer below image.
Part Number: TPSM846C23
Hi.
Is there a way to reset TPSM846C23 to factory defaults ? I cannot see anything on this neither in datasheet nor in Fusion Digital Power Designer.
Kind regards,
Karol
Hi Team,
Customer is looking for solution for single diode load switch. The input and output assignment is shown below.
Customer required small size, high voltage (20V max.), 2A.
Would you please recommend the proper solution for this?
BR,
SHH
Part Number: TPS23758EVM-080
Hi,
It would be useful for me to get Altium project of this board.
Thanks.
Part Number: TPS62840
Hi,
We have tried usingTPS62840-1DLCEVM55 and it works fine for us. We set the same configuration in our PCB, but the convertor heats up when the input supply is connected. I can share the schematic and PCB layout for review.
Part Number: LM1117
Hi,
I have questions about the thermal information given in the LM1117 datasheet (SNOS412N) chapter 6.4.
Is it actually true that the DCY package have lower Rjc and Rjb thermal resistance than the NDP package and the other way around when it comes to Rja?
Could you please explain how this come?
Is there any case where the NDP package would be a better choice than the DCY package?
Thank you!
Regards,
/Gunnar Alm
Part Number: TPS65133
Hello,
we are looking for a dual dc/dc with Vin above 30V and split rail output.
Currently we use LM5166 as step down from 30V and then TPS65133 for the split rail (positive and negative output).
Perhaps it's better to use some dual dc/dc with internal switch and ext. diode and low ext components instead.
Any suggestions are welcome.
Thanks
Part Number: UCC27211
I am adoperating 2 UCC27211 gate driver in a DCDC current controller, the LI and HI inputs are fed by the outputs of a LT3741 controller and LO HO outputs are driving 4 IRL60B216 as it can be seen in this attachment
the inputs of the gate drivers are correctly driven but their outputs are not, the same error can be seen in both drivers
LI and LO:
HI and HO:
Light blue waveforms are the inputs of the UCC and violet waveforms are taken directly at the MOSFET's gates
Speaking about the Low side, i wondered about some voltage drop due to high driver current on the little resistances in series with the gate and i actually noticed that probing directly at the output of the driver
the square wave reaches like 10V (NOT 12V as it should be!!!); hence i tried to modify the value of the resistances but with poor results, i actually also tried to place a 0ohm instead so as to avoid the voltage drop but all I obtained was that 6V square wave clearly both at the gate and at the output of the drivers
Speaking about the High side i wondered about a bad choice of the bootstrap C value, i increased it till 800nF but nothing changed
I also tried to increase the bypass capacitor value up to 4,7uF, to remove the SMDJ15CA and to place a resistor between MOSFET's gates and ground/HS, but still no result! So up to now i have no idea what to do
There is clearly some error in my design because i already used those drivers in a similar design with the same current controller but with different mosfets
Part Number: TPS74401-EP
Hello,
I am planning to use TPS74401MRGWREP.
The design configuration as follows,
1. Vin = Vbias = 3.3V
2. Vout = 2.5V (Vin-Vout = 0.8V)
3. Iout = 2.3A
But in Typical characteristic Dropout voltage vs Iout relationship, Dropout is increasing as output current increases.
And my Question is,
1. will this regulation required high dropout at full load condition
2. Will it work for the above configuration, Because Vin-Vout=0.8V
Thanks,
Ramesh M
Part Number: TPS27S100AEVM
I would like to connect NC pins 1 and pin 11 to ground in a TPS27S100A design to support alternate parts, if needed. Will this be a problem for the TPS27S100A?
Part Number: BQ40Z80
Hi Batt,
I have any the same things after Reseting the gauge
BR
Loïc
Part Number: TLV61220
HI TI,
In my project, there is a problem in the test.
VIN=4.0V;I_IN=1.64ma;VOUT=5.33;I_OUT=1.1ma;The load is a 5K RES. Efficiency=90%. i think it's good .
when I_out @ (1~10)ma,the VOUT & Efficiency i think no problem.
when I_out @ 20+ma. the VOUT Being lowered, only 4V.and Inductance has noise.
The following PCB is the layout of the reference documentation and EVM.
the waveform of SW(What should be the frequency under normal conditions?).
CAP(X5R_1206_10uF)
RES(1%_0805)
inductance(4.7uH_30%_1A)
I want to know why this is happening.pls help me~~~
Part Number: BQ27426
Dear Team,
our customer would like to use the BQ27426 in a low-power application. The battery is rated with 120mA and the average current in active state is 1mA, and in stand-by mode <0.01mA. For higher accuracy, the customer chose a scaling factor of 60x (following slua792).
> How does the customer need to set the discharge, charge and quit current thresholds?
Specifically, the customer sees that the Quit Current would be around 2400, whereas the TRM says a max. of 1000.
> What is the impact of having the values wrongly set up?
Thanks and best regards
Martin
Part Number: TPS54561
Hi Team,
just want to check with you if adding a 5.4V bias voltage on Boot pin through a diode is OK for normal operation or not.
The 5.4V power up before Vin and shut down before Vin. Thanks.
BRs
Given
Part Number: BQ25700A
Hi Team,
I create this thread to follow up http://e2e.ti.com/support/power-management/f/196/p/831718/3103453#3103453?jktype=e2e
This is the same project w/ the same settings. In 1st and 2nd build, customers creates both 20pcs to evaluate. They can 1 pcs w/ current ripple in each build.
Already adding more 60uF cap on Vsys or VBAT to avoid PFM mode. However this current ripple is not the similar w/ what we saw.
Kindly help to explain this behavior and provide solutions to resolve
Test Procedure
Test Result
Part Number: LM34936
Tool/software: WEBENCH® Design Tools
Hi,
I am designing a system requiring 9V 6.5A from a lithium ion battery source. I used webench but having issues on the recommended results. I want it to have 2.7V minimum input but when i opened the datasheet of the controller used, the 2.5V input has a bias condition. As i understood, you will need external supply higher than 2.5V which i dont have. Can you advise solutions?
Thanks,
Emman
Part Number: BQ34Z100-G1
Hi,
I have done following to setup the fuel gauge.
1. Updated design capacity to 2600
2. Updated CC threshold to 90% of design capacity
3. Updated Q max to 2600
4. Updated design energy to 19240
5. Updated cell charge voltage range to 4200 for all temperature ranges
6. Updated number of series cells to 2
7. Updated pack configuration to 0x08a1
8. Updated charge termination
Taper current 150
Min taper capacity 5
Cell taper voltage 100
Taper window 40
TCA set 99
TCA clear 95
FC set -1
FC clear 98
9. Updated pack learning config
Load select 1
Max res factor 15
Min res factor 3
Min passed charge first qmax 90
Max qmax change 30
Cell term v delta 200
Max res cale 5000
Min res scale 200
10. Calibrated voltage divider
11. Calibrated sense resistor
12. CC offset
13. Board offset
14. IT Enable
15. Learning cycle
Everything seems to work well and the Max Error shows 1% at the end.
Issue appears in form of wrong SOC (lower sometimes 65% sometimes 90%) value after a few hours of pack sitting idle. The pack voltage show 8340 which is very close to fully charged.
Any ideas of what is going wrong?
Thanks