Can you please give me the component design calculations file of this PMP8740.
What is the low side output voltage of this design?
Thanks.
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Design calculations
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BQ34Z100-G1: Using a NTC different from the 103AT type specified in the datasheet (different beta coefficient).
Part Number:BQ34Z100-G1
Hello all,
I'm planing to incorporate the BQ34Z100-G1 gas gauge in an up coming BMS design. Because if legacy stock, and the fact that they are used in different places of the system, my external NTC resistor will be different than the one specified in the datasheet - the Semitec 103AT type. My NTC, as the 103AT type, will be 10k @ 25 degrees. The difference is in the beta exponential coefficient, the 103AT type has a nominal value of B=3435 [K] where as my NTC has a B=3988[K].
I found some references about the way that the BQ34Z100-G1 calculates back the temperature from the ADC reading [1], but I can't find any info on how to do that exactly. From what I can find, there might be a way to update the polynomial coefficients the the gauge uses, but I can't find any info on how to do that.
Is this even possible? Or am I forced to use a 103AT (or equivalent) NTC type of resistor?
[1] - e2e.ti.com/.../722764
Cheers,
Aleks
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UCC2897A: PMP5123 modification for Input voltage:6 to 36V & Output: 12V/10A
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UCC2897A: Question about reference design-PMP5123
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BQ76PL455A-Q1: OVERSMPL 32 x CMD_OVS_CYCLE = 1 won't respond?
Part Number:BQ76PL455A-Q1
I hope I'm keeping you busy with all my questions ;-D,...but here goes yet another - When OVERSMPL = 7D (32 samples each channel), my results are good. But when I reprogram to FD (32 samples, 1 per pass), the AFE stops responding. When querying its registers, they all report correct (OVERSMPL = 0xFD), but it won't reply to my read ADC command. Resetting it back to 7D gets it running again, or 0x7B as well....just on 0xFD ???
Thanks again in advance!
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TPS22990: Exposed Pad Connection
Part Number:TPS22990
Hello,
A customer of mine accidentally connected the EP the GND (vs VIN as the datasheet would suggest). We're planning on placing some soldermask over the EP as a way to isolate this connection on our prototype boards.
Other than decreased thermal performance, is there anything else we should be concerned with? We are in essence floating the EP.
How is the EP connected to the die inside the TPS22990?
Don
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TPS76801-EP: TPS76801QPWPREP latchup-2
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TINA/Spice/LM5118: Compensation circuit
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Need a 7.4 v 600 ma hour Li-ion solar battery charger
Need a 7.4 v 600 ma hour Li-ion solar battery charger chip for a 12 volt solar panel. Inexpensive. For several agriculture products that we are designing the power supply for. What do you suggest. Thank you for your help.
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WEBENCH® Tools/LM5022: Need Help with a Design for 51V/ 10A using this part
Part Number:LM5022
Tool/software: WEBENCH® Design Tools
Dear TI,
I have created a design using LM5022 for I/p 12-48VDC and O/p of 51V 3A. Now my question is if i just change the FET from 15A to some FET with 100A current can i use same design with some modification to get around 10A?
My design link is "
If not can you help me what components i need to change to get my desired outputs? Deeply awaiting your reply.
Regards,
Vijay Gohil
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BQ24650: Configuring a LiFePO4 solar charger
Part Number:BQ24650
Hi,
I need to charge a LiFePO4 battery pack.
The pack is a 16V 9Ah.
As I understand from the datasheet, it should be possible to charge this pack right?
Another thing, I saw that there is a possibility to set the charging current (via Rsr), I would like to set the charging current to 5A, are there any considerations That I need to take into account? (Like the solar panel types for example or anything else?)
One last thing, is it possible to connect the BQ24650 output to a load as well to the battery? What do I need to do to enable that if it is possible at all?
Thanks,
Tomer
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UCC28251: does it need an opto coupler in addition to current transformer?
Part Number:UCC28251
Hi Everybody,
please consider the schematics: ( form UCC28251 datasheet on the page 42 )
please notice the current feedback which is sensed by a resistor through a current transformer ( in the primary side ).
does it need really an opto coupler ( U6 ) in addition to the current transformer ( CT1 )?
is it possible to connect the secondary side of CT1 to the ground of the secondary side ( of half bridge ) to eliminate the U6?
Best Regards,
Ras
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LP5907 - very large output voltage drop and voltage rise over 5 sec
Hi! Please excuse me for my English.
A noisy voltage of 4V (they can make noise up to 3.6V) is supplied to the input of LP5907. LDO does a good job of this and we get 3V output with fluctuations of 100mV. However, sometimes, for unknown reasons, there are voltage drops at the output up to 2V with a duration of 500 μs. And sometimes after a voltage drop, it recovers 5 seconds.
An MCU with 10mA consumption is connected as a load. 0603 10μF are connected to the input and output of the LDO (I tried to reduce the output to 4.7 μF and to 1 μF, but without result).
And it is also interesting that by soldering 0603 100nF to the input pins of the LDO, the problem disappears. Tell me, please, how to explain this behavior of the LDO, what is the problem and how to solve it? Thanks!
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TLC5916: Rant: Confusing Language In Datasheet
Part Number:TLC5916
Reading a Datasheet is hard enough without having to stumble over vague or clumsy writing--case in point:
Section 9.4 of the TLC5916/5917 datasheet uses the following language to describe how to switch from the "Normal Mode", to one of the "Special Modes":
The signal on the multiple function pin OE(ED2) is monitored to determine the mode.
When a one-clock-wide pulse appears on OE(ED2), the device enters the Mode Switching phase. At this time,
the voltage level on LE(ED1) determines which mode the TLC591x switches to.
This is confusing, because "is monitored" suggests the OE(ED2) is an output. The phrase, "When a one-clock-wide pulse appears on OE(ED2), the device enters the Mode Switching phase" seems to corroborate this perception. Yet, the phrase "At this time, the voltage level on LE(ED1) determines which mode the TLC591x switches to," calls this into question. Where is this pulse coming from. Does it magically appear from some nondescript source. Is the take-away, here, that the proper transition from Normal Mode, to Special mode, requires we monitor the OE(ED2) pin in the hope this state transition will occur at some future time--and that we will know it has occurred by detecting a toggle on this pin?
An examination of Figure 12, which is preference by the phrase, "The signal sequence shown in Figure 12 makes the TLC591x enter Current Adjust and Error Detection Mode." suggests a more active role in causing this transition. Which suggests the proper language would be: "The multiple function pin, OE(ED2) is used to alter the mode." AND "When a one-clock-wide pulse is applied to OE(ED2)..."
The text in Section 9.4 continues with,"In the Normal Mode phase, the serial data can be transferred into TLC591x through the pin SDI". So, does this imply that serial data can also be transferred into the TLC591x by some other means? I mean, it sounds like it's saying, "you could transfer serial data through the SDI pin, if you wanted to, but, [whisper] there's another way."
The phrase, "LE(ED1) can latch the serial data in the shift register to the output latch.", also uses the word "can", as if there is a "cannot" lurking in the specification. The use of the word "can", is passive, and gives the impression there's one or more caveat--as if latching might not happen in all circumstances. Did the author mean, "A function of the LE(ED1) pin is to latch serial data in the shift register," or "In the Normal Mode phase, the serial data is transferred into TLC591x through the SDI pin"?
Language is very important in conveying precise information about a complex system. If the language is passive, vague, or suggestive [even if this wasn't the intent] makes an already difficult task [trying to understand an arcane system], even more difficult! Please address this by hiring people with proper writing/language/translation skills. And, please, make an effort to have existing documents reviewed.
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buck topology- average or peak current mode control
Hi Everybody,
i approached to a multi stage converter in several posts.
the last stage is buck converter which should to be controlled with a micro-controller.
the input voltage is 0-400 VDC ( from a half bridge stage ) and the output is 0-400 VDC. the maximum current is 1 A at 400 V and 10 A at short circuit.
the output current should to be controlled through a closed loop.
i have several questions:
1) how can i select between peak and average current mode control?
2) what are the considerations?
Best Regards,
Ras
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BQ294502: The reference design for UL2595
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CCS/TPS65094: TPS650942 I2C or SVID interface
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TLV702: Connecting a 5V to TLV70230's output pin
Part Number:TLV702
Hi Team,
My customer wants to know what kind of damage will cause to TLV70230 if connecting a 5V to its output pin. The condition happens when programming the MCU which has a wide supply range from 2.7V to 5V.
The nominal input voltage is 3.5V and output voltage is 3.0V
Thanks and best regards,
Victor
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TPS65310A-Q1: About Output Capacitor for Boost circuit
Part Number:TPS65310A-Q1
Dear ALL:
In the datasheet, when we want to chose Output Capacitor for Boost circuit , it said we shoud use "Equation 12 " to calculate the value of Output Capacitor, and we should meet " FLC is in the range 10kHz-15kHz". but if I use the data about L=4.7uH and Cout=57uF which are gived by datasheet, I found that the" FLC is not in the range 10kHZ-15kHz", so I want to konw why is that?
Best Regards.
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TI fuel gauge single cell data
Dear all Expert :
Do we have TI single cell Fuel Gauge marketing share ratio data ?
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