Part Number: LM34936
I'm working on my LM34936 Buck-Boost design. I need the 3D step files for the MOSFETs: CSD17577Q3A and CSD17575Q3. I need to accurately model my design in 3D because space is so constrained.
Where can I find these? Please let me know.
Thanks,
Carl Olen
Hi,
I have an application where I need to back-up a power path for about 500ms. I have planned to use Super caps charger and Monitor IC together.
I was asked to design to control the Discharge Period i.e. If in case of another application it should be able to run for 200ms and cut off based on the timer circuit. Is it possible to achieve the timer-based controlling the discharge of the supercapacitor?
Part Number: BQ40Z60
We are using bq40z60 as our 2S1P battery pack GG.
In the configuration, I have set DA configuration = NR + SLEEP + 2-cell = 0x15
Also I have set Bus Timeout = 5s
However, I observed the pack goes to SLEEP mode much longer than 5s after I removed the current and pull-down both SMBud line.
Sometimes 20s, sometimes 60s, sometime 5s.
Do you know what else I need to set to ensure the actual SLEEP time is around 5s ?
Thanks,
Zane
Part Number: TPS62160
Hi,
Do you have the data of Reference voltage vs Temperature?
Best Regards,
Kuramochi
Part Number: TPS7B82-Q1
In spice simulations with the TPS7B8233-Q1 part, after the part went into undervoltage shutdown at 2.7V the part started to sink current. The current going into the device spikes to 20mA then decays. Is this to be expected from the actual device or is this a problem with the spice model. From the datasheet, the shutdown current shown is a max 1uA.
Part Number: BQ25120AEVM
We have a BQ25120AEVM connected through the PC App and the EV2400 USB->I2C bridge to the EVM. We can set the Vsys output voltage to 3V3DC via the provided tools. The EVM reverts back to the default 1V8VDC when power cycled. How do I make this setting permanent or NV?
The application will epoxy pot the device and register configuration must be permanent in all cases through IEC testing. The host micro controller is 3V3DC. Unfortunately, the Vsys output setting can not reference a voltage divider like ISET, ILIM, & IPRETERM. I can have the host push the configuration during production but it will be unrecoverable if it can not retain the desired Vout (Vsys) setting. I can not bootstrap the MPC off the battery as it may be fully discharged when the BQ25120A receives external power.
My additional questions are:
1) if there is a similar device with all external hard configured settings and no I2C.
2) Can this device be ordered in a default Vsys voltage of 3V3DC?
Thank you,
Part Number: BQ24140
Hi
About bq24140, the range of weak battery voltage threshold (VLOWV) is 3.4V–3.7V, if the battery voltage lower than 2.9V, whether the chip go to precharge mode.
The customer simulate battery voltage 2.6V ~2.9V, and use USB charge, but could not precharge the battery.
Waiting for your reply.
Thanks
Star
Part Number: TPS54140
I have one question about the compensation of voltage loop.normally,we will use the compensation that one end connects the output of error amplifier and the other connects the reverse input, but for TPS54140, one end connects the output and the other connects the ground?? why connects ground? can you help me?
Part Number: UCC28742
The VS pin absolute maximum rating on the datasheet is listed for -0.75V to 7V. Is this rating valid during all operation or only at end of each switching cycle, disregarding beginning spike seen at beginning of each switching cycle.
Based on the 4.65V over voltage threshold (V ovp), it seems to give little room for inductance spikes.
Part Number: UCC21520
Hi Team,
For specified application, customers would like to set up DTt be to 0. Even if keep this pin is float, the DF will be < 15ns.
Need you advise to know how to let DF to be 0s.
Part Number: LM5642
Hi
I would like to know the ESD specification of the LM5642.
On DATASHEET, it seems that only the HBM value came out.
Can you provide HBM (Human Body Model), CDM (Charged Device Model)?
Part Number: LM1085
Hi
I would like to know the ESD specification of the LM1085ISX-ADJ.
On DATASHEET, it seems that only the HBM value came out.
Can you provide HBM (Human Body Model), CDM (Charged Device Model)?
Part Number: TLC5940
Dear Pros，
There are several questions about the driver IC of TLC5940:
1. TLC5940 is an SPI interface, can we don‘t use the GSCLK signal?
2. What is the difference between dot correction and grayscale control?Is it DC mode and GS mode respectively?
3. Difference between DC connecting to EEPROM and register
Part Number: TPS549D22
Hi Team,
Need your help to provide the TPS549D22 EEPROM rewrite times.
Best regards,
Albert Lee.
Part Number: BQ24610
Hi TI experts,
the project battery is 6S2P，need 3C peak charge current, I selected BQ24610
Is there a better alternative?
Part Number: BQ25606EVM-772
Dear Sir,
My customer use BQ25606 EVM to test.
As you see waveform: VBAT around 3.5V, BQ25606 have some glitch
I saw VBATLOWV_RISE: 3.0V~3.24V, I didn't know why happen this glitch.
Please you kindly review & provide suggestion.
Thanks!
Part Number: LMR23630
Hi,
Customer have an issue about not-match the LMR23630 enable threshold with their calculation result.
Could you please give me your advice for the reason of this issue?
Condition
Vin : 24V
RENT = 270kohm
RENB = 51kohm
VENH = 1.55V(typ), 1.7V(max) : from datasheet
Vin_rising = 9.8V(typ)
Measurement results
Vin_rising = 13V
EN_rising = 2.1V
Muk
Part Number: UCC28780
Dear sir
I have some issues about UCC28780, I'd like to need help.
SPECS: VIN=100VAC, VOUT=20VDC 2.25A , Fsw=500kHz , L=60uH,
When Start up at no load, I confirmed that UCC28780 outputs only about five pulses at 1.5ms interaval.
I can not find above problem and solve written in datasheet shows 1.4.10 System Fault Protections.
But, at 1A Load, it suddenly starts up and it seems work correctly.
And, Load becomes 2Amps and more, it makes some audible noises and I comfirmed below waveform.(Mazenta:Secondary SR gate, blue:lowside Vds, green:PWMH)
Then, I tried to measure main loop current waveform,which is HB node at several times.
However, try to above,some noises are Superimposed on Vds and PWMH waveforms,
it makes unstable operation.
At worst case, it made some semiconductor`s device destroy by EOS.
Thanks.
Best Regards.
.
Part Number: LM5088
Dear,
I have a general question on the buck controller technology related to the LM5088.
I am designing a circuit with the LM5088 buck controller, with which I noticed that I could get well over 90% efficiency for my intent.
This LM5088 is non-synchronous buck controller, while the vast majority of synchronous buck devices show off their superior efficiency.
Would you help me to resolve my questionnaire?
Q1. If the synchronous buck technology is always superior to the non-synchronous, why semiconductor manufacturers like TI still retain the non-synchronous lines?
Q2. The LM5088 provides satisfactory efficiency to me. As far as the efficiency concerned, to what application I should employ a synchronous-buck controller?
Thanks,
Joshua Kim
Part Number: LP8556
Hi Sir,
From LP8556 spec, PWM/I2C IO pins only define absolute maximum ratings.
Does it means these I/O’s input voltage level range are independent from EN/VDDIO pin?
For example, our EN/VDDIO only supply 1.8V, but PWM may supply 1.8V or 4V ; I2C may supply 1.8V or 3.3V.
Does it have any concern when I/O pin voltage level higher than EN/VDDIO(internal logic power)?
Thanks, Ian.