Part Number: TPS65910
Hi Team,
Is the NRESPWRON's output integrated of voltage supervising results of each bus?
I want to check if we need to put some supervisor on the voltage buses or not.
Regards,
Takashi Onawa
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TPS65910: NRESPWRON behavior
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TPS65910: Unused pins
Part Number: TPS65910
Hi Team,
Can I leave the following pins open if we don't plan to use the related functions?
SDASR_EN2
SCLSR_EN1
SLEEP
GPIO_CKSYNC
PWRON
INT1
CLK32KOUT
OSC32KIN
OSC32KOUT
TESTV
VFB3
Let me know if there is any pins which we can not leave it open.
Regards,
Takashi Onawa
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TLV767EVM-014: Output performance test
Part Number: TLV767EVM-014
Hi there:
We're testing the EVM with several condition for our customer.
Vin: 15V, Vout: 12V/1A --- OK, eff%= 79%
Vin: 15V, Vout 5V --- no output, Is that due to power supply input current limit?
Vin: 15V, Vout 3.3V --- no output, Is that due to power supply input current limit?
Vin: 15V, Vout 1.2V --- no output, Is that due to power supply input current limit?
Vin: 5V, Vout 3.3V/1A ---OK, eff%= 67%
Vinr: 5V, Vout 1.2V --- no output, Is that due to power supply input current limit?
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LM3642: How to enable torch mode correctly
Part Number: LM3642
Hi team,
My customer is trying to enable torch mode by changing register(0x0A) to 0x02 (torch).
1. They tried to send (0x0A) to 0x02 (torch), but the LED is not lighted up, then they read back register 0x0B is 0x05.
2. They tried to send (0x0A) to 0x01 (indicator), then send (0x0A) to 0x02 (torch), the LED will be normal, and LED pin is 2.6V, OUT pin is 4.14V.
Does this mean hardware circuit/components are fine?
How do we set to torch mode correctly?
Please help to advise then we can check if there is something wrong.
Regards,
Allen
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UCD9222-EP: Future availability of UCD9222-EP
Hi,
I need to power the variable core supply CVDD of TMS320C6678 multicore processor. As a smart-reflex solution, I can opt for either an analog controller LM10011 or a digital controller UCD9222-EP.
TI website is now not recommending UCD9222 for future designs, but says nothing about UCD9222-EP.
- Is UCD9222-EP also getting obsolete in the near future?
- Is it safe to use UCD9222-EP for upcoming designs?
- In addition to UCD92xx-EP series and LM10011, what else can be used to power the variable copre supply CVDD of TMS320C6678 mult-core DSP?
Thanks,
Binayak
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BQ34110: GPC cycle automated mode using EV2400
Part Number: BQ34110
Hello,
The bqstudio ver 1.3.90 Build1 (from April 16, 2019) has the option to automated the GPC Cycle.
Once Automated Mode is selected, the UI allows to test the pins VOUTx of the EV2400. There are two push buttons with two states: pressed and released.
My expectation is that while the button state is pressed, the VOUTx signal keep high until the state button is change to release. However, the signal pins are high for some variable time (around 500ms and 2000ms) independently of the button state.
I started developing a system to detect these pulses (based on a micro-controller) in order to control two relays to enable/disable the charger and load. However, after each stage is finished, there is not signals on the pins
In summary, may the GPC cycle can be performed in automated mode using the EV2400?
Additionally, may the GPC cycle be performed with a power supply and load simulator managed by other system/application (not bqstudio) neither BQ34110 to acquire the data? This approach is describe below:
- Discharging: enable the load and stop with termination voltage, while recording the Voltage, Current and Temperature coming from the simulator and external sensors
- Charging: enable a power supply and stop with tapper current, while recording the Voltage, Current and Temperature coming from the power supply and external sensors
Or is preferable to acquire the data with same sensors (i.e. BQ34110) in order to avoid any difference?
Thanks
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BQ34110: Battery and power disconnection versus remained capacity accuracy
Part Number: BQ34110
Hello,
A system is designed based on the BQ34110 gauge in order to acquire the voltage, current and remained capacity of a external LiFePO4 battery.
Per requirement, the user can connect/disconnect the battery anytime, which means the BQ34110 will be power off.
Assuming the calibration, setting and GPC profile is performed already, is this approach valid in order to get an accurate value of the remained capacity once the battery is connected?
Considering this application, which gauge type is considered more convenient: CEDV or IT?
Thanks
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BQ27742-G1: CONFIG UPDATE Mode
Part Number: BQ27742-G1
Hi,
Good evening.
Thanks for support for the last query.
Later, we have developed the I2C interface code between s124 MCU to BQ27742.
Now we can able read the Device id, firmware ID, temperature, current, voltage etc.
Now we need configure device with new design capacity, etc.
For that, we are planning refer the BQ27741 sample code and make similar changes for BQ27742 device.
In BQ27741 device, SET_CFGUPDATE subcommand, Control(0x0013) to enter CONFIG UPDATE Mode.
In BQ27742, device the above command is missing and CONFIG UPDATE Mode is also missing.
so, kindly provide the device.
Regards,
Umesh
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BQ25601: Disconnecting the battery from system and possible substitute
Part Number: BQ25601
Dear Team,
In our design we are using the BQ25601 charger with a software option to disable the BATFET, it works OK, when writing to address 0x07 bit 5 the system is disconnected from battery and switching the QON pin returns the desired voltage on SYS. However, more suitable for us would be to use this external switch to disconnect the battery from system as well, without software control. Is writing to I2C register 0x07 the only option to disable the BATFET? If so, is there maybe a replacement chip with the functionality as described?
Regards,
Krzysztof Kondratowicz
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TPS92662-Q1: LED PWM dimming frequency recommend range, dimming rise time and falling time confirmation
Part Number: TPS92662-Q1
Hi expert,
My customer wants to know do we have a recommendation for LED PWM dimming frequency? And can we share data for dimming rise time and falling time? Is that listed in datasheet as trise(LEDx) and tfall(LEDx)? Thanks for your help.
BRs,
Binbin Wang
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TPS2376: can not power on after 2KV differential mode surge test
Part Number: TPS2376
Hi, team,
My customer use PD TPS2376 and found that after 2KV differential mode surge test, device can not power up.
The pin 4 and pin 5 are not shorted, but the voltage of POE +/- is only 1.8V.
So what's the reason that cause this phenomenon?
Thanks and best regards,
Kelly
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TPS61040: Frequency analysis
Part Number: TPS61040
Is there a tool or model where I can do some frequency response analysis of the effect of adding the feedforward caps across the feedback resisters?
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PTH08T241W: STEP File for PTH08T241WAS
Part Number: PTH08T241W
Hi Team,
Our customer would like to request the STEP file of PTH08T241WAS.
Can you share us the STEP file for this device?
Thanks!
Jonathan.
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BQ25505: Component Recommendation for Small Solar Panel Charging of Li-Ion 18650
Part Number: BQ25505
I will be using a relatively small solar cell to charge a Li-Ion battery. My application is tolerant of slow charging.
Solar panel: 5V (6VOC), 30mA-34mA
Battery: 18650 3.7V 2200mAh, no thermistor
This is a simple application with no need for monitoring functions. Just basic charge management and battery protection.
I've been looking at the BQ24210 solar charger and BQ25505 boost charger. The 24210 is easier and less expensive to implement.
Does anyone have a recommendation for which part to use, or another part that would be better?
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LM5175: High side driver behaviour
Part Number: LM5175
Hi,
The LM5175 doesn't have charge pump, only boot strap to supply high side MOSFETs.
fig 12 in the datasheet, in Buck mode , SW2 is always high: how the high side MOSFET gate(HDRV2) could be supplied if SW2 doesn't go low to recharge the boot strap capacitor?(the datasheet says in 8.3.13:In buck operation, LDRV1 and HDRV1 are switched by the PWM controller while HDRV2 remains continuously on)
Same in boost mode.
Thanks,
Clement
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TPS2596: TPS259621DDAR Production Status
Part Number: TPS2596
Hello - not a technical question, but can you tell me when this part TPS259621DDAR is likely to go into production? I have asked Mouser and Digikey this question but they have no information.
Thanks in advance.
Mike
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LP5030: IC Supply
Part Number: LP5030
Dear all, I cannot find on DS whether the OUTxx pins are tied to VCC for ESD protection, allowing a maximum voltage of barely VCC+0.3 on every OUT pin.
I'm designing a system in which main supply is 2.8V. This means I have to tie to battery voltage each LED otherwise I wouldn't have enough room for some of their VF on non TYP conditions. I'd like to know if I can safely operate VDD at system's 2.8V or if this could trigger ESD diodes when turning LEDs OFF.
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UCC28780: UCC28780
Part Number: UCC28780
Hello TI!
UCC28780's datasheet has provided the design for the compensation for its burst mode operation. With that, would the controller require another compensation network for AAM different to that from ABM? I wanted to design a compensation network based on the classic stability requirements in linear control theory, but I'm not quite sure if I it would be necessary for two compensation networks for the two different modes. Would it be possible to implement a single compensation network that would satisfy both the stability requirements for AAM and ABM modes?
Thanks a lot!
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LMG1205: Soldering of components
Part Number: LMG1205
Hello Everyone,
I have been working on a PCB which has LMG1205 on it but few of our PCB didn't worked and issue we found was due to improper soldering of the component,therefore can anyone please help me to find a good company in India or Asia who can help us in proper soldering of such component.
Thanks in advance.
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LM34936: discrepancy between schematics and BOM in SLVUAP7A
Part Number: LM34936
Hello,
M. Xi of TI gave me some hints for adapting LM34936 to SLVUAP7A, i.e. designing a DC/DC converter with narrow input voltage and broad output voltage.
Except for a few parts which have to be changed in order to migrate from LM5175 (SLVUAP7A) to LM34936, everything should remain the same.
But there are discrepancies between the values noted on the schematics of FIG.2 (SLVUAP7A) and the values in the BOM.
Those are critical parts for current loop compensation: R10 and C13.
Can someone tell me if I should trust the values noted on the schematics or the ones in the BOM?
On the schematics, it reads R10=1k, C13=27nF, in the BOM it reads R10=3.3k, C13=22nF.
I don't actually have the EVM board of SLVUAP7A, so I can't check the values by reading or measuring them.
Thanks for the help.
Regards.
Matthieu
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