Part Number: BQ77905
hi
I want to use BQ77905 protection ic for 5 series cell I read the datasheet its rage is for OV 3 to 4.5V and for UV 1.2 to 3V Can I use it for the range (OV 3.65 AND UV 2.5V).
Please guide me
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BQ77905: bq77905
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TPS2372: Ethernet packet loss issue
Part Number: TPS2372
Hello,
When we use the TPS2372 POE to supply power, there will be packet loss when the network cable is 100 meters ping packet test.
When we switch to DC24V, it is normal.
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TPS2373: Looking for transformer spec of TIDA-050023
Part Number: TPS2373
Dear Expert,
Customer would like to design PoE for 12Vour@3.5A with flyback.
I found we have TIDA-050023 which is suitable to customer.
Could you share T1 and T2 spec of this reference design with us? If this is confidential, please share with me offline.
Thanks!
benkuo@ti.com
Regards,
Ben
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TPS2491: Inquiry about formula(3)
Part Number: TPS2491
Dear Specialists,
My customer is considering TPS2491 and has a inquiry about formula(3) of datasheet P.12.
I would grateful if you could advise.
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According to equation(3) of the datasheet,
Inquiry(1)
I cannot understand this formula
I think
Ts(max)/RθJC(max) < PLIM and Tj(max)/RθJC(max) > PLIM
transform the formula
Ts(max)/RθJC(max)<Tj(max)/RθJC(max)
PLIM : 0<(Tj(max)-Ts(max))/RθJC(max)
This is not correspond to formula(3), it seems to be typo.
Could you please let me know.
Inquiry(2)
TJ(max) is a junction temperature.
On the other hand, Ts(max) is a case temperature.
I think case temperature is not the same as junction temperature.
Could you please let me know why Ts(max) is used?
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I appreciate your great help.
Best regards,
Shinichi
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Hot Swap recommended application design
Hi Team,
I want design 12V Hot swap solution for 400W products, please suggest,
Need to recommend I2C control and no I2C control,
thanks
Kevin
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BQ76940: Current sampling period of BQ76940
Part Number: BQ76940
Hi team,
Could you tell me the sampling period of measuring current in CC?
I found the integral period of CC is 250ms, but I could not find the sampling period discription in the datasheet and FAQs.
Regards,
Makoto Teramoto
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TPS92641: Constant current regulator for TEC (Peltier)drive in parallel
Part Number: TPS92641
Hi experts,
For TEC (Peltier) driver, I plan to use LED driver as constant current source. TPS92641 is good for constant current regulator.
To drive TEC(Peltier), it is needed for much current (~5A), so I would like to operate some LED drivers in parallel.
Is it possible?
Thanks and best regards,
Ryo Akashi
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UCC28950: Request simulation dithering circuit UCC28950
Part Number: UCC28950
Dear ALL
Pls help , customer need to know simulation dithering circuit UCC28950 by LT spice .
Thank you so much & Bestregard
Prarinya
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TPS40322: How to Protect TPS40322 under test start up Over voltage protection ?
Part Number: TPS40322
Dear ALL
Pls help to me .How to protection TPS40322 under test start up over voltage protection ?
Condition test is below .
1.Start up Over voltage protection test :
Condition test :Open feed back of TPS40322 then power on the unit
Result :The TPS40322 is damage
2.Continous over voltage protection test :
Condition test :Power on the unit then open feed back of TPS40322
Result : The TPS40322 is not damage
Thank you so much & Bestregard
Prarinya
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LM5170EVM-BIDIR: TINA_TI Reference design problem
Part Number: LM5170EVM-BIDIR
Hi,
I am trying to simulate LM5170 reference design provided. I am assuming the LM5170 TINA-TI Reference Design provided under the design tab is same as the typical application found in LM5170 datasheet.
I am not able to understand why two extra MOSFETs are used as marked and an open voltage source.
I would like to simulate for one voltage source on one end and load (Resistor) at another end with an outer voltage loop control. The LM5170 TINA-TI Reference Design(.TSC) file seems incomplete or some other typical application design is provided.
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TPS2491: external gate clamp diode when Vin=12V
Part Number: TPS2491
Dear Specialists,
My customer is considering TPS2491 and has a question.
I would be grateful if you could advise.
---
According to the datasheet P.11 7.3.3 GATE, the device has an internal clamp diode which has 12V to 16V clamp.
I think of using FET, VGSmax is 20V and VDSmax is 40V.
In this case, if Vin=12V input, does external diode need?
I think the data sheet description seems to depend on VGS, not Vin.
Even if Vin = 12V, I don't think an external clamp diode is necessary, is it correct?
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I appreciate your great help in advance.
Best regards,
Shinichi
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TPS2491: external capacitance on the VREF pin
Part Number: TPS2491
Dear Specialists,
My customer is considering TPS2491 and has a question.
I would be grateful if you could advise.
---
According to the datasheet P.12 7.3.6 VREF,
The device does not require a bypass capacitor.
But special application can connect 1000pF or less.
Could you please let me know what kind of use case do you assume?
---
I appreciate your great help in advance.
Best regards,
Shinichi
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TLV733P: Need slower rise time > 0.5ms LDO
Part Number: TLV733P
Dear Sir,
We are looking LDO that similar with TLV733P, but we need slower rise time > 0.5ms.
Would you help to advice one?
Application:
Vin range : 2~ 3.8V
Iout > 300mA
Vout 1.8V or 2.5V or 3.3V
Rise time > 0.5ms
Regards,
Hugo
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SM74611: Sim-model for TINA
Part Number: SM74611
Hello E2E,
Q1;
I could not import the sim-model file for SM74611 to my PC. Does TI have the new sim-model file?
Q2;
I'd like to use this device for energy harvesting. I understood that Vf of this device is 26mV(at 8A) from datasheet. Is it correct?
Q3;
Energy harvesting source is 100mVac. Can this device be used for rectification?
Regards,
ACGUY
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BQ40Z80: Current consumption in Sleep Mode
Part Number: BQ40Z80
Hi all,
I need your help about current consumption with BQ40Z80 GG.
In BQ's Datasheet there it supply current for differents mode. Normal mode = 663 µA, Sleep mode = 96µA and Shutdown mode = 1.4µA
I have measured the supply current and I have 700µA in normal mode but in sleep mode I have 500 µA instead of 96 µA !!
You can see on screen shot here:
Did you have the same things?
BR,
Loïc
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TPS54719: Schematic review: 3-6V input, 2.5V output ,7A
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TPS2493: About input clamp TVS etc.
Part Number: TPS2493
Hi,
1. About input clamp TVS
Regarding Q1 in "TPS2493: Question of input capacitor etc.", it's difficult to place input TVS in our system because it's difficult to place a fuse.
However, our system isn't happend Hot-plug frequentry by normal users(only service engineer may do). So I think it's low risk not to use input TVS.
If you have any other solution, please tell me.
2. About current detection value
Regarding Q2 in "TPS2493: Question of input capacitor etc.", I heard it's not recommended to insert resistor between DCIN-VCC pin.
But we need that solution to pass the short test(VCC-GND) because it's difficult to place a fuse in DCIN line.
Would you please tell me the way to calculate the current detection value with that solution?
If you have any other solution, please tell me.
Best Regards,
Kasuga
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UCD90120A: MONx pin voltage while turned off
Part Number: UCD90120A
Hi,
Is it safe to monitor a standby (always on) voltage rail, that is also present while the UCD90120A power supply is turned off?
Standby rail is 3.3V and would be conneted to a MONx pin with 1k-1k resistor divider.
I haven't found any mention of this in the datasheet.
Thanks
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TLV713P: Lower Consumption device up to 5uA
Part Number: TLV713P
Hi All,
My customer is doing a sensor for agricultural equipment and is using TLV71318PDBVR as a reference and CC1310.
Customer is looking for the same device as TLV71318PDBVR but with lower consumption up to 5uA. Right now TLV71318PDBVR is consuming 50uA.
Do you have any suggestion? If roadmap device please send me a private email.
Many Thanks,
Antonio
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BQ77915EVM-014: spark was coming in PACK+
Part Number: BQ77915EVM-014
Dear Sir
I developed a 5S2P battery protection module using the reference design of BQ77915EVM. First I connected PACK - terminal to charger -ve terminal for charging purpose. But, When we connecting PACK+ terminal to charger +ve terminal, the continues spack was coming. I can't identify the reason why it is coming. Please help me with this.
Regards
Hemavathi
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