Part Number: TPS22976 Tool/software: WEBENCH® Design Tools I want to use this load switch to a single input and dual output. http://www.ti.com/lit/ds/symlink/tps22976.pdf In the datasheet, they have a single input (single power source connected to VIN1 and VIN2) and single output (single system module connected to VOUT1 and VOUT2) configuration only. can this chip be used for single input and dual output? if yes, please let know how to configure it. If no, please suggest another load switch with single input and dual output.
↧
Forum Post: WEBENCH® Tools/TPS22976: How to configure TPS22976 to have single input and dual output.
↧
Forum Post: DCP010515B: Tj junction temperature
Part Number: DCP010515B Dear, Could you say me whay is junciton temperature of ref. DCP010515BP-U? Thank you in advance
↧
↧
Forum Post: RE: BQ24780S: Reverse polarity protection
Hi, What kind of battery are you using, and how long did you leave it connected in reverse before the IC and FETs were damaged? Also, did you have an adapter connected when you inserted the battery in reverse? Best regards, Angelo
↧
Forum Post: RE: LP5030: IC Supply
Let me check this and reply you next Monday.
↧
Forum Post: RE: BQ25601D: How to connect BQ25601D and bq27z561?
Thank you Angelo! If I understand this correctly, my circuit should look something like this...? Also: should I power processor directly from PACK+ and PACk- or should I connect it to SYS_GND? Thank you, Žan
↧
↧
Forum Post: RE: LMZM33606: LMZM33606 and LMZM33603 in parallel
Jimmy, thanks. This resolves my issue. I'm going to use a split-rail architecture. Carl
↧
Forum Post: LM34936: Lowest quiescent current: LM34936 or TPS25982?
Part Number: LM34936 Which circuit has the lowest quiescent current when the main device EN/UVLO is NOT ENABLED, the LM34936 buck-boost converter or TPS25982 eFuse? Thanks, Carl Olen
↧
Forum Post: RE: TPS1H200A-Q1: Minimum current limiting capability
Sorry but you did not answer my question regarding the minimum current limit setting. Is there a minimum limit to what the current limit can be set to. Will my example of 50mA work?
↧
Forum Post: TPS56637: Crazy foortprint layout for TPS56637!
Part Number: TPS56637 I spent lots of time to figure out the dimensions of this IC ( http://www.ti.com/lit/ds/symlink/tps56637.pdf ). Nothing makes sense!! Whoever drawn this was VERY unprofessional. At the first look, you think everything is given to you (off course in a very strange way!) but no it is not true. Lot's of information is missing. For example, what are the distance of pin 1 or 4 from the bottom and top edges? Just saying this could be way simpler than what it is now. Bob
↧
↧
Forum Post: TPS62742: Recommended chip with higher output current value
Part Number: TPS62742 The basic requirements of the chip: low Iq, high efficiency at light load, maximum output current 0.4A, input voltage is 3V~5.5V, the highest possible duty cycle (100% best). The problem with TPS62742 is that when Vout ≤ Vin ≤ Vout + 0.7, Iout + Iload is 100 mA. Help recommend a similar TPS62742, the output current is 400mA when the input voltage is under any condition.
↧
Forum Post: TPS82740B: phase instability impossible due to microcontroller decoupling capacitors?
Part Number: TPS82740B Hi, I am using TPS82740B in a new design. On page 21, section 10.2.2.2, it says "Care should be taken that the total effective capacitance present at the output does not exceed 10µF in order to guarantee loop stability." The microcontroller that I'm using calls for a total of about 15uF of distributed decoupling capacitance. Does the sentence in the datasheet refer only to output capacitors placed right next to the TPS82740B, or will the loop stability be affected by my microcontroller's decouping caps? If the microcontroller is only a few centimeters away from the TPS82740B, will the parasitic power plane inductance between the regulator and the micro be enough to mitigate this issue? Thanks, John
↧
Forum Post: BQ27GDK000EVM: BQ27GDK000EVM board questions
Part Number: BQ27GDK000EVM Hi Team, I have BQ27GDK000EVM evaluation board and I work with BQ27421YZFR-G1A fuel gauge connected externally. 1. evaluation board works with manual setting. I can charge/discharge battery at set profile. 2. I cant run learning cycle procedure in automatic mode, I can't find any information how to do this, may be I need different/additional connections of hardware, I don't know. Questions: 1. How I can chose/create Chemical ID automatically? 2. How to make learning cycle in automatic mode? 3. How to generate correct golden file for fuel gauge? Thanks, Shlomi
↧
Forum Post: LP38692: selection of output capacitance in LDO regulators
Part Number: LP38692 I am using the LP38692 for regulating the voltage from 9V to 5V..... Could you please suggest me the quantitative procedure for the selection of the output and input capacitors......
↧
↧
Forum Post: BQ24040: Charge current (ISET) is not relate what I configured
Part Number: BQ24040 Dear TI staff I am using BQ24040 to charge Li-Ion Battery on my application. The below information is my configured. IN PIN is connected 5V OUT PIN is Vbatt TS PIN --> connect 10k ohm to ground ISET2 PIN --> 10k ohm to Vbatt PRETERM PIN --> 2k ohm to ground ISET PIN --> 1.1k ohm (Charge current should be between 463.6mA - 518.1mA relate to Kiset 510 Aohm - 560 Aohm; see Fast charge current factor, page 7 in datasheet) When I connected 5V input, the charge current as I measure at input side is 0.45A, that the charge current out of my expectation. Could you suggest me where I wrong? Remark: Actually charge current as I expect is 540/1100 = 490mA Best regards, Narukom S.
↧
Forum Post: LM5025A: PMP4468 - EMC Issue
Part Number: LM5025A Hi , My customer have used LM5025A for a long time, and TI design PMP4468 was exactly designed based on their requirement long time ago. their design closely followed this design and the BOM is exactly the same. but this design has a electromagnetic radiation problem which have impacted their ADC[accuracy reduction] and their VGA interface[diplay interference]. This issue have last for a long time. they even designed a metal shield, but the improvement is small. BTW, They tried to use a integrated power modules to replace LM5025A and the issue gone. so,They strongly suspect that this design has EMC problems. Is there any expert who can help with some suggestions? How to reduce the interference? Thanks. below is the schematic and part of PCB (Please visit the site to view this file) In PCB, I highlighted related symbols, You can find what is it from schematic: U140 - LM5025A U100 - ADS7229IPW U98- ADG408 [Mux] U101- INA159[Difference Amplifier]
↧
Forum Post: WEBENCH® Tools: suggestion of i2c charging chip with low Iq
Tool/software: WEBENCH® Design Tools i would like a charging chip with i2C connection to the MCU. Low Iq charging chip is preferred. DSBGA package has bad production yield so I prefer none DSBGA package. Please suggest a part. If there is a tool such as WEBENCH Design Tool to select charging chip, please let know how can i use it to select the charger chip.
↧
Forum Post: BQ24072: no current draw from the battery if the battery got disconnected and reconnected
Part Number: BQ24072 The design is the reference design in the datasheet. Connecting the battery when there is no external power source, the current will not draw from the battery unless connecting the external power to give it a jump start. Disconnecting the external power source after the jump start, the battery will start to power the rest of the system. Is this system designed for this application or not? Is there any way to avoid this problem? There is no related information in the datasheets. Thank you very much.
↧
↧
Forum Post: BQ76930: What is bq76930 current monitor accuracy?
Part Number: BQ76930 Hi Guys, Can you please tell me what is the current accuracy of bq769x0? I meet a question is report 2030mA when actual current was 2000mA, i'm not sure it within the SPEC. Thanks. Jimmy
↧
Forum Post: UCC21520: What's the modulation scheme?
Part Number: UCC21520 Hi, in our digital isolator like ISO7721, we specify the modulation scheme to be OOK. How about our isolated gate driver? And UCC21520 specify "10-ns Minimum Pulse Width" in datasheet page 1. Does this mean that any iput pulse width shorter than 10ns will not affect the output state? In datasheet page 10, section 6.10. We also said the maximum minimum pulse width to be 20ns, so 10ns is the typical value? My customer has ever used some other gate driver which also specify the parameter "Minimum Pulse Width", and if the pulse width is less than "Minimum Pulse Width", the output will be constantly on, which is not what they wanted and is caused by the modulation scheme. That's why I ask the modulation scheme of our isolated gate driver. And not all of our isolated gate driver has such parameters.
↧
Forum Post: LMG1205: lmg1205
Part Number: LMG1205 The module lmg 1205, used in a DC-DC module, malfuntions in the level of PCB. The phonomennon is that the supply voltage of both the lmg1205 and the input cannot be up to the ecpected values. In my design, the input voltage is 84V, but it turns out only 0.6~0.9V able to add to the circuit. What mistakes may I had made? The PCB or the circuit itself that has been stimulated in LT spice several times? It is improtant to note that during the stimulation, there are some points when the speed of stimulation gets really slowly, but eventually the output voltage obtain the ideal value. If these ponits account for the failure?
↧