Part Number:TPS1H000-Q1
Hello,
What is the highest PWM frequency we could drive this switch with? This is a 12V application.
I noticed the switching delays in the datasheet and tried to do a worst case analysis.
90us turn on delay + 120us rise time + 90us turn off delay + 40us fall time = 340us = ~2.9kHz.
It seems that's a theoretical max and to prevent problems we should probably stay below that. But how far below?
I hope that makes sense, and thank you for any help.
Regards,
Ryan B.
Part Number:BQ34Z651
Hi There.
Due to some corrupted SMB transactions during flash reprogramming I seem to have bricked my bq34z651 device. As such it will now not respond when I try and write a new data flash .rom file to it so I seem to be unable to rectify the issue.
A year or so ago Thomas Cosby sent me the default .senc file for the device but the link has since expired so I was wondering if someone could send me that file again so I can try and revive this device.
Thanks,
David
Part Number:UCC28910
We need some help on 3 projects ASAP. All are relating to the UCC28910 and a similar fault condition, operating voltage range. These are all of the products that we’re currently using the UCC28910 on. All schematics and component info has been provided to 'Lough, Benjamin' ben.lough@ti.com and Jenkins, Darren d.jenkins@ti.com . Said files can be emailed as needed.
Product 1
Tested (single phase) voltage range: 214VAC minimum – untested maximum
Voltage range required: 140VAC - 630VAC
Product 2
Tested (single phase) voltage range: 80.5 – 263VAC
Voltage range required: 70VAC - 277VAC
Product 3
Tested voltage range: 85.8 - 245VAC
Voltage range required: 70VAC - 277VAC
Part Number:BQ24295
Hi -
I need to detect whether there is an open battery (none connected) or a depleted battery for my system. Depleted should be pretty easy by just sensing the battery voltage, but I haven't figured a way to detect a disconnected battery. With no battery, I sense about 4.1V on the BAT pin, about 70mV lower than VSYS. Is this a body diode conducting? Or is the BATFET on? Is there any way you can think of to sense an open battery?
Thanks
Michael
Part Number:TPS7H2201-SP
Team,
A question about the power SW. The data sheet says the following:
Is this an abs limitation on the slew rate of the input to the SW device? (some devices in the design require faster rise time)
Is there a status signal that is available from the power sw to determine that it has tripped due to over voltage?
Is there a way to determine that it shut down due to over voltage and not some other reason?
Part Number:BQ79606-Q1
Hi,
If only aux ADC is used, can it still support ASIL-D?
Customer will not use cell monitoring pin and use only aux ADC.
Is there any concern at supporting ASIL-D?
Thanks.
Part Number:EM1402EVM
Hi,
I have not been able to get the EM1402EVM board to work (respond to commands and report status etc back to the microprocess).
I believe I have the batteries hooked up properly.
I can see commands being sent to EM1402EVM, However, there is no communication (on the scope the EM1402EVM Tx line remains high with no data) back to the microprocessor.
First question, what would cause the EM1402EVM not to communicate ? I see the wake line toggle (is there a minimum time)?. Could I have received a bad board?
The fault line is always low. Since there is no communication I don't know what is causing the fault. I don't have any temperature sensors hooked up. Could this cause a fault and the communication to not work. Only one board is used and I have the toggle switch set to single (I did try differential). Do I need to "terminate" the Tx and Rx signals used to communicate with a seond biard?
I am not sure why I don't see any communication and what would cause this to occur.
Any help would be appreciated.
Malcolm
Part Number:UCC27712
Hello,
I have a customer using this part with a several hundred volt bus voltage. They are concerned about having the very high voltage components connected to the same ground as the low voltage parts. Is this actually a source of damage? I see it's part of the typical application diagram so I'm assuming it isn't a huge red flag.
Is there anything typically done to isolate or separate those grounds? Our isolated gate drivers can't support several hundred volts.
Any suggestions, or are we working too hard to solve a non-issue? Any insight it appreciated!
Regards,
Ryan B.
Part Number:LP8556TM-EVM
Tche LP8556TM-EVM Specification list the Max Current/Channel is 50 mA, does it mean each of the LED channels on the LP8556TM_LEDLOAD board is capable of carrying a forward current up to 50mA as well?
Part Number:BQ76200
Dear All:
I use the BQ76200 to drive the High side mos in the BMS application, I find the discharge MOS is often short in the SCD test that the SCD current value is 1000A . As show below is the schematic and test wave. I find the Miller platform time is too long. Can you help me to solve the issue , Thanks~
Part Number:BQ40Z80EVM-020
Hi,
I am having trouble figuring out how to config the BQ40z80 to turn on automatically when a load is connected between PACK+ and PACK-. I am simulating a battery 6s battery with a power supply protected by a diode and a string of 6 resistors. I've turned off all protections and permanent fails. I set the pin configuration to read the PRES pin and the status of the pin toggles when connect and disconnect it from PACK-. With PRES shorted to PACK- and 22V applied to BAT the chip just does not start up and I cannot communicate to it via bqStudios. The only way I can get the chip to initialize is to either short BAT to PACK+ or apply a voltage to PACK+ with a different power supply I used to simulate a charger.
Is there a PACK Threshold value somewhere I can set to 0? I couldn't find one while searching through the documentation. I want the chip to turn on as soon as a load is connected to the battery pack.
I know the PRES pin is configured correctly because when I have a charger connected between PACK+ and PACK- and PRES shorted to PACK- the chip boots up as expected, turns on both the CHG and DSG FETs, and I can read register values via bqStudios. Without the PRES pin shorted to PACK- it does not initialize.
Part Number:BQ34Z651
Hi There,
In order to control the out-rush from my battery pack when connected to a capacitive load I am hoping to add an active current limiting network to the DSG FET gate to slow it's turn on. This is because currently a large capacitive load triggers the AFE SC and OC protections which renders the battery unable to power the load, the protection just cycles the output on and off for all time.
As such I am wanting to simulate the FET driving circuitry, such a simulation is very dependent on the specifics of the gas gauge's output. The data sheet for the part more or less only specifies a rise time for the output. As such my simulated driver is a very square edge with that rise time, whereas the output I see on the PCB (the simulation captures the surrounding circuitry too) has a distinctly rounded top edge. so I was wondering if you could provide me with a reference that might allow me to construct my own spice model of the output driver?
Thanks,
David
产品编号：BQ34Z100-G1
您好，TI技术专家：如图所示：我似乎已经学会成功，完全充电容量也符合我们的预期，但我把电池组的电量切断了，然后充电来验证功率是正确的。但我发现我用2.5a充电，但仪表总是显示0％？
srec文件：
(Please visit the site to view this file)
Part Number:UCC2897A
Dear Team,
It seems our calculation tool is for Forward.
Do we have a tool for Flyback?
The customer wants to know how to calculate the transformer inductance.
BR
Kevin
Part Number:UA79M
Hi Team,
Dropout voltage under VI=-19V is the following and the condition is Iout is 5mA.
On the other hand, Dropout voltage under VI=-10V is no Iout condition.
Could you tell me the condition of Iout when VI=-19V?
Best Regards,
Yaita
