Part Number: TPS25924
Hi Sirs,
According to the TPS25924 datasheet page 10, over current limit accuracy is 30% with configuration at 1.0A. Does it mean that the over current protection threshold will be between 0.7A and 1.3A with 1.0A configuration? If so, the specification may not be acceptable for customers. Would you please advise tips to improve the accuracy?
Thank you and Best regards,
Wayne Chen
12/20/2019
Part Number: TPS62840
Hi there,
I am expecting samples of the TPS62842DGR and am currently laying out the board so this is badbly needed :)
Mickael
Part Number: BQ25601
Hi
BQ25601, high-current charging 2A setting, rechargeable battery capacity 19000mAH;
An abnormal phenomenon was found during charging, as shown in the figure below. At the beginning of charging, the charging current would decrease to 1A after rising to 2A for a period of time (11:50-11:55), and then resumed to 2A after a period
of time.
Part Number: BQ24650
Hi
BQ24650 application circuit as below.
Electronic load connect to output, electronic load mode is set to power mode when power greater than 0.5 W, BQ24650 output are powered down until the electronic load set up as the voltage mode (Analog Switch/Multiplexer (less than or equal to 5V) charge of a battery) is about 85% efficiency.
Bq24650 charging module is followed by the need for lithium ion battery and parallel the second DC/DC power circuit.
Thanks
Star
Part Number: UCC24612
Hi support team,
how to calculate the value of R2 while UCC24612-1 in high side application
operation frequency 25K~65KHz
Vout = 12V/5A
Part Number: UCC28061
Hi Support team
may i have UCC28061 equivalent impedance of each pin, my customer requests for it
Part Number: BQ24650
Hello Team,
Part #: BQ24650, i am using for Lead Acid Battery charger application.
input source : 15V -Adaptor
Battery : 12V@7AH Battery
Input source is Not connected to Solar, i am not using MPPT feature.
Schematic reference i have taken from - SLUU444A–August 2010–Revised October 2010.
1. kindly suggest, which are the components do i need to do DNP to disable MPPT feature.
2. Disabling the MPPT feature, will this affect the Lead Acid Battery charger section ?
is there any provision to share the schematic in privately, want to keep schematic confidential.
Regards,
Vasant Anwari
Part Number: UCC28061
Hi Support team
In order to control PHB into single phase stage, the COMP voltage is key factor,
what conditions that will affect the COMP voltage (VINAC? TEST? VSENSE? Choke parameters other) and how to well control the single / dual phase in different AC input & output loading?
Part Number: TPS7A8300
Hi sir,
I am not able to derive 4.5v from divider circuit. With ANYOUT configuration i can get 3.95V and without mounted anything (only resistor divider) o/p is 1.1V . With resistor divider and anyout (pin 9, 10 and 11) i am getting 5V.
Vin = 5v, EN = 5v but o/p = 1.1V
Attaching the circuit for reference.
Any solution please help
Part Number: BQ25619
Dear all：
Besides,I try to figure out whtether the BATFET(Q4) is on when BQ2519 working on ship mode? Beacause I need PMID output voltage (no matter the battery voltage or 5V) to wake up my MCU, so that I can know whether the earbuds inside or not. However, in the Block Diagram, i can not see the diode from battery to sys pin. If not, can i series a diode from battery to PMID
Best Regards,
Zhibin.YE
Part Number: BQ34Z100
Hello Team,
My customer is trying to obtain Golden Image file for the said IC with 2s2p combination of Samsung ICR18650 -26J batteries. Following steps are taken by them:
As per the procedure
1. discharged the battery till FD is set,
2. relaxed for 2 hrs,
3. entered the command 41 and 21 ( VOK, QEN and Gauge_EN got Set) ,
4. charged till FC is set and
5. relax for 5hrs.
Outcome: while relax VOK , FC got cleared and REST got set , but Qmax and PF status is not getting updated.
Can you let us know what can be the issue for the same ? Is their any issue with the said procedure ?
Part Number: BQ25601
Hi Team,
My customer has two questions for BQ25601 when designing it.
1. Beside inductor selection guide 9.2.2.1 in datasheet, is there any other specific selection consideration that BQ25601 requires more than a normal Buck?
2. Do we have an EMC design files for BQ25601?
Thank you for answering this question!
-Wenhao
Part Number: UCC256304
I've made power supplie using ucc246304 controller. One is functioning properly as expected while second one not. When turned on under load it generates 1/2 to 2/3 output voltage and works at 660 kHz. If turned on unloaded and then put under load then everything looks fine. Please advise what's wrong.
Part Number: BQ24172
Hello,
The system examples in the datasheet for the BQ2417x, in figure 23 the system voltage is taken prior to the sense resistor Rsr, and in all of the other figures the system voltage is taken after the sense resistor Rsr. Which is correct? Is figure 23 only applicable to BQ24170? What affect will this have on the BQ24172?
Thank you
Scott Mullin
Part Number: BQ40Z60EVM-578
Hi there,
I am using the BQ40Z60EVM-578 and want to connect LiFePO4 batteries. The reference design uses the BQ294700DSG an overvoltage protection ic (second-level protectors), which seems to fit only for li-ion batteries.
1. Is it possible to use the BQ40Z60EVM-578 with LiFePO4 batteries?
2. Is there any second-level protectors for LiFePO4 available? If not how should i connect the AFEFUSE pin of the BQ40Z60?
kind regards and thanks
Part Number: LM5104
Hi,
In case the supply voltage VDD = 0, are the HO and LO outputs of LM5104 in guaranteed states to have both MOSFETs turned off?
Thanks!
Marcus
Part Number: BQ20Z65-R1_BQEVSW-SW
The http://www.ti.com/tool/BQ20Z65-R1_BQEVSW-SW software download link is broken.
I found the download on another E2E post but we should get this fixed.
Regards,
Mark
Part Number: LM27761
Using the LM27761 with 3.3V input, -4.8V output, and 5mA - 70mA sinking load current. We observed an output of -3.5V instead of the expected -4.8V across full load current range. What are we missing?
Part Number: BQ76930
Hi,
I extend TS2 to external 10K NTC as option, but when NTC is not plug in, I still measured some value from TS2Hi 0x21 and TS2Lo 0xC7, when external NTC is inserted it can measure correct temperature value with my conversion routine.
note : parallel 4700uF capacitor is in place.
Tiger
Part Number: TPS7A19
Hi
Let me check the below
- Does TPS7A1901 have reverse current protection ?
If no, should customer install protection diode if they need ?
- Can PG pin leave open if the pin is unused ?
Thank you and best regards,
Michiaki
Part Number: TPS7A30
Hi
Let me check the below
- Does TPS7A30 have reverse current protection ?
If no, should customer install protection diode if they need ?
Thank you and best regards,
Michiaki
Part Number: TPS61026
Hi
Hi
Are there any concern about the case of using at high altitude ?
Here is the conditions
- Altitude : 4000 – 5000m
- Atmosphere : 600 – 900 hpa
Thank you and best regards,
Michikai
Part Number: BQ25606EVM-772
Hello,
I would like to download the Altium PCB files for the bq25606EVM-772. When I clicked on the link I was sent to the E2E forum.
Thanks,
Chuck
Part Number: LM5026
Hi team,
Could you please advise how to improve the thermal performance for the LM5026 design? Such as optimizing the setting, adding snubber or any other options.
The case temperature of main FET is up to 117C at room temperature and full load condition. Thanks for your support!
Please find the attached schematic and waveforms.
Spec: 12V to 54V/2.3A
Schematic:
1. changed MP1/MP2/MP3 to FDMS86200 to cover 110V Vds spike.
2. changed MP4 to Si7461DP for lower conduction loss.
(Please visit the site to view this file)
MOSFET waveforms:
Best regards,
Sam Ting
Part Number: BQ77905
I have a question regarding the BQ7790508 that we're using in our BMS. The question is regarding the gate drivers. The specs in the datasheet do not seem to be consistent. Maybe you can help to clarify.
(1) Under Absolute Maximum Ratings, the Discharge Gate (DSG) is rated at 1mA maximum input (current sink).
(2) Under Electrical Characteristics, Charge and DIscharge FET Drivers, the discharge FET turn off time, Tdsg(off) is specified for 5us with a 10nf load.
If I assume for purposes of calculation simplicity that the gate driver is a current source, then the driver sink current calculated from the discharge FET turn off time spec is:
I = C dV/dT = (10nf) (9.6V) / 5us = 19mA
C = 10nf = load specified in the datasheet for discharge off time
dV = 9.6V = 12V gate drive, measured 10% to 90% as specified in the datasheet.
Tdsg(off) = 5us = FET turn off time from the data sheet
This is much higher than the 1mA maximum rating.
What is the actual sink/source current for the discharge gate driver (DSG)?
