Part Number: SM72442
Where can I find the High voltage version of the SM3320 Charge Controller? I believe that the document which I got from the TI website is for Low voltage version since the input and output capacitance are rated at 50V.
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SM72442: High voltage version of SM3320 MPPT Charge controller reference design?
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LM66100: optimizing current consumption
Part Number: LM66100
We have a circuit with 2x LM66100. The current trough inactive IC is 22uA @R3=100k – because of R3. This is to much for our application.
- How can this current be completely cancelled?
Supply is made by 2x 2 batteries in series.
Thanks for help.
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e-Fuse & Hots Swap Controllers - Power Supply protection for 6-100Vdc Input
Hi,
Is there any e-Fuse & Hot swap controllers available in TI to support the below requirements,
1. Allowable input Voltage range : 6-110Vdc
2. Protection against voltages over 110Vdc & below 6Vdc to protect the Load
3. Protection against Over current above 3A to protect the power supply source in case of short circuit.
4. Support HOT Swapping with 6-110Vdc at 3A
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BQ34Z100-G1: The FCC change
Part Number: BQ34Z100-G1
Dear All:
T he battery was fully charged at room temperature (with a full charge of 28AH), and then placed in a low-temperature environment and stood still (-10℃) for 12h.
I did the experiment with two packs:
1) AVG I last run-4318ma, and this battery pack completed the jump from 28AH to 24AH at low temperature.
2) AVG I last run-14254ma, the battery pack of this group has completed the change from 28AH to 7AH in low temperature static setting.
This abnormal phenomenon is described as follows, and the specific data are attached.
The experimental phenomena of abnormal jump change are as follows: at normal temperature (full charge 28AH), put it in a low temperature environment and stand still (-10℃). After 2h of standing, the full charge of the battery jumps to 9.2ah (at this time, the temperature is -1.8℃). After standing still at low temperature for 10h, the full charge change to 7.3ah.The phenomenon is shown in the figure (in the attachment, there is a proportional coefficient of 4 between the log full charge and the actual full charge, and the actual full charge = log full charge *4) :
When will the two values AVG I last run and AVG P last run be updated during discharge?I did the intermittent discharge experiment and discharged 10A for 30min. Neither of the two values was updated.In addition, how much effect do these two values have on the power update in the static state?
(Please visit the site to view this file)
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UCC28702: UCC28702
Part Number: UCC28702
Hi Eric,
We redesigned our transformer and the basic functionality of circuit is working fine.
We tested entire input range from 85 to 305V AC and current from 250mA to 1A and is working perfectly. But we facing issue with lower currents below 150mA, the output voltage is continuously fluctuating between 4V to 5V in particular input voltage ranges like 170V AC to 240V AC and above 270V AC.
Can you please suggest and guide us in this regard.
Thanks in advance.
Ramgopal.
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BQ40Z80: bq40z80
Part Number: BQ40Z80
Hello!
I'vback to work with my 40z80 doard and, according to this thread,
have a new problem - phisically fail in SC situation.
Looks like the DSG gate driver dont have though power to carry DSG FET opened troug the moment then MCU detects the ASCD and to discharge gate then its needed.
So I tryed many ways to solve this problem but in sum, juast have handful of fried mosfets)))
Remind:
I have 7 cell battery, with up to 8 A discharge currents, in pulse or constant mode.
Use shceme equal to EVM but Sir870 fets in power side. Now I excluded from the scheme crossprotection fet and PCHG fet, and PDSG circuit, they only made it more worse.
So the probe pictures from gate on the situations:
1. Normal OCD1+OCD2 with 4A discharge current (no DSG FET explosion)):
2. ASCDL+ASCD detection in result of connection of the 2700uF/50V e-cap (no fet explosion):
3. Real SC on the 73C/16A thermal fuse with DSG FET explosion, and no ASCD or ASCDL detection....
I have 3M pullup resistor and 1k gate resistor now. ASCD protection registers set on 00 and 11... Mb I should make somekind of driver for the dsg gate? I make many boards on bq4080, but never had the same problem with short circuit protection(
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TPS61021EVM-723: Jittering and instability when output is plugged in MCU (SimpleLink™ Ethernet MSP432E401Y MCU)
Part Number: TPS61021EVM-723
Hi everyone,
I'm currently working on a design with this chip. The input is 3.3V and the output is typically 50mA (current driven in MCU). SuperCap is also plugged in the input so when the power is shut down it survives for an additional 20s.
I am having issue with the fact that when said output of the TPS61021 is going in the MCU there is an instability and jittering, while when I'm plugging a passive LOAD (65 ohms so the same 50mA is driven by the chip) there is absolutely no jittering and everything is working fine.
Actually wondering if there is any known solution for this issue
First picture : output on channel 2 with passive Load (65 ohms)
2nd picture : output on channel 2 with MCU as output
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TPS63060: Reducing Inrush current
Part Number: TPS63060
Dear Support team,
I could find approx 2.2A inrush current at start up in Figure 27 and 28 of datasheet. The inrush current is limited by Typ2.25A defined as average inductance current limit, isn't it?
I want to reduce the inrush current.
I can find application note "Extending Soft Start Time in the TPS6107x Family of Boost Converters". Will this method described in it be used for TPS63060 also?
Best Regards,
Hirokazu
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TPS65216: Layout review
Part Number: TPS65216
Hi Team,
I need assistance on a layout review.
I will send the file in a separate email.
Regards,
Fabio
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TPS50601A-SP: Thermal pad plating and gold removal recommendation
Part Number: TPS50601A-SP
We are using 5962R1022102VSC (TPS50601A-SP) converter and also 5962R1222403VXC (TPS7A4501-SP) LDO. We intend to solder the heat spreader to the PCBs and would like to know both the plating specification for the gold on the heat spreader and also whether TI recommends gold removal. I tried searching on the TI site and was unable to find this info. Also the SMD and 38535 don't appear to specify the plating.
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TPS544C25: Non-Monotonic Startup
Part Number: TPS544C25
I am using the TPS544C25 to regulate a 3.3V output. The chip works fine and can regulate and load step, the only issue is that during startup, there is a small peak as the voltage rises from 0V to 3.3V. Whether it starts from no load or full load the issue still persists. I have attached a picture for reference. The yellow/orange line is the output voltage and the blue line is the voltage on the comp pin of the chip. I do not understand why the comp pin is going to 0 when the peaking occurs. I looked at the datasheet and the peaking seems to occur when the reference voltage hits the bottom of the ramp signal.
The converter operates from 12V to 3.3V.
If I start the converter up with some output voltage still on the capacitors, the startup rise is monotonic and everything works well.
Any help is appreciated thanks.
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TPS2546: Mode Change from Divider1 to Divider2 (DCP_AUTO)
Part Number: TPS2546
We are using this USB Charge Port Controller to manage a USB type A receptacle. The ILIM_HI setting is 1.2A for a 1A DCP.
We wish to support portable devices that look for Apple signatures on D+/D- as well as shorted D+/D- per USB BC 1.2 DCP.
When we connect a device (iPhone or static load) we observe the chip change modes from DIVIDER1 to DIVIDER2 with a 2 second pause (VBUS is discharged).
The datasheet explains that the mode change occurs if the load device draws more than 750mA.
The port DCP is configured for 1A so changing to DIVIDER2 mode (2.1A) is not desirable and may confuse the attached portable device.
Can you help us understand why the mode change is happening and why 750mA is the threshold?
Thank you!
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UCC2800-Q1: Is there a way to limit the maximum duty cycle limit?
Part Number: UCC2800-Q1
Hi HVC team,
Question above. The max duty cycle is 100%, is it possible to limit to 80% (for example)?
Thanks,
Lauren
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TPS63036: Output accuracy
Part Number: TPS63036
HI TI Team:
I can see in the specification, that the output with PS/SYNC = GND can be +6% or -3% if IOUT < 5 mA .
If I understand ok, the accuraccy of the output would be better if IOUT > 5 mA but not worst, isn´t it? This behavior is the same with PS/SYNC = VIN?
Thanks for your time :)
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TPS60150: TPS60150
Part Number: TPS60150
Hello! I am wondering, is it okay to wire VN and EN in parallel? I am trying to boost a battery to 5V DC, and from what I can see in the datasheet, EN is supposed to gain a high signal from a controller. I am trying to power a controller with this part, and cant EN the charge pump from the controller I am trying to power from that same charge pump. Thank you all for the help!
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TPS61022: Can Vout pin tolerate 5V when VIN and EN are at 0V
Part Number: TPS61022
I am designing a circuit that has two power sources that go through regulators with outputs that will be tied together.
Regulator A: Boost (3-5 Vin to 5.2 Vout) using the TPS61022.
Regulator B: Buck (9-15 Vin to 5.2 Vout)
When using Reg B, efficiency is not important. It is critical though when using Reg A. My question involves the behavior of the TPS61022 when turned off. When Reg B is in use, the TPS61022 will have 0V at VIN and EN but 5.2V at Vout. Will the TPS61022 draw reverse current or be damaged in this state? I don't want to include load switch at output due to added losses and cost.
Thanks,
Josh
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TPS92830-Q1: Constant Current analog dimming for a 40mA-1.5A range?
Part Number: TPS92830-Q1
Hello Team,
I see the TPS92830-Q1 support the analog dimming functionality but i see that is recommended for binning correction and thermal protection in the datasheet. I was curious to know if i could instead use it to adjust the current from 40mA to 1.5A range to control brightness. Is this range supported on this IC?
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LM5170EVM-BIDIR: EvKit dead on arrival
Part Number: LM5170EVM-BIDIR
Hi,
I ordered the EvKit a few weeks back and just got to hooking it up. After setting up the jumpers for my mode (buck only, using the onboard voltage loop) and applying 48v, nothing happened. It appears the UVLO line is being held low by shorted pins on the onboard supply regulators U3, U4, and U5. After lifting the EN pin on the LDOs, I can get the UVLO net up to 3.3v using an external supply (but of course the internal 10v supply is off). It seems U5 also has a short in the UVLO pin (but not the enable pin), when the pin is soldered in place I can measure 3.3v across R53.
I'd really rather have the onboard 10v supply for my bench testing, so I'd like to confirm that those 3 parts are the issue and get replacements if possible... though I'm not sure if I'll be able to replace U5 with its thermal pad on the massive power planes and no thermal relief.
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BQ40Z50-R2: Purpose of the VIMA function
Part Number: BQ40Z50-R2
Hi,
I'm interested in the thinking behind the VIMA function. I have spent a great deal of time cycling and tweaking a LiFePO4 pack I am working on, including fine tuning a range of parameters relating to balancing, but I am beginning to suspect that much of the trouble I have been facing relates to the use of cells with poor manufacturing repeatability and/or supply chain batch mismatching.
I have found that although I now have well balanced cells (in terms of both QMax DOD0 and relaxed cell voltage), I still encounter a VIMA fault late in the charge phase (around 99%).
I am considering relaxing the Delta Threshold from the default 300mV to accommodate greater variation and also extended the check current boundary from the default 50mA, to 100mA (equivalent to my termination current), but I'd appreciate any advice you may have as it's a little unclear to me what the intent of the VIMA function is and what the impact of cell manufacturing variability may have.
Thank you,
Jeremy.
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LM3488: LM3488-output/input voltage in TINA-TI
Part Number: LM3488
Hi,
i'm trying to obtain an output voltage at the output of LM3488 of 100V by changing the feedback resistor to 368.315kOhm: from the picture i'm obtaining an output of 80V, something wrong with my schematic? could be due to the limited VDS(max) of the MOSFET or are there any other limitation? the mosfet i'm using is CSD19538Q3A.
Moreover, i would like to decrease my input voltage from 5V to 3V; in this case i know my MOS would'nt be suitable because of its 3.6V Vgs(th) , do you have any other PN to suggest? I've seen in the datasheet that you suggested IRF7807, do you think it could be used for an application of 3V to 80V?
Thanks,
Elisa
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