Part Number:BQ27542-G1
Hi,Sir:
For test purpose, we want to keep the supply power of BQ27542-G1 always keep 5.3V max,
that means the cells's max voltage is 5.3V,
is that OK for long run test ?
the time maybe very long about 30*24hrs.
Thanks!
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BQ27542-G1: Could the supply power always keep at 5.3V
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WEBENCH® Tools/BQ34Z100-G1: regarding reading high current above 10 a to 30a using shunt resistor 0.75m ohm .
Part Number:BQ34Z100-G1
Tool/software: WEBENCH® Design Tools
As in the bq34z100-g1 evm board , shunt resistor is capable upto 7a current .
so we removed the shunt resistor in evm and replaced a local shunt resistor which is capable of high current with specification of 0.75 m ohm , 7w .
but values are getting undesired values of charging and discharging current .
what are the required settings to be considered for getting correct values .
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BQ78350: How to resolve the current offset?
Part Number:BQ78350
As you know, the actual resistor is bigger than the sensor resistor.
The sensor resistor value is 0.001 and the actual value is bigger than 0.001 because of the resistor of PCB.
Therefore, the charging current is 2690mA in bqStudio.
However, the actual charging current is 1000mA.
Is there any way to resolve the current offset?
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LM5069: 150V current limmitting switch
Part Number:LM5069
Hi team,
Our customer is looking for current limiting switch or e-fuse for inrush current control of a power source..
Input voltage range is DC 60V to 150V.
UCC2921 is one example product having near feature, which has floating input power source architecture.
On the other hand, LM5069 etc. are up to 80V or more but not reaching to150V.
We will be very appreciating your help.
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TPS51220A: TPS51220A use single channel
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TPIC7218-Q1: TPIC7218-- 0X12 Register will change
Part Number:TPIC7218-Q1
software will 0X12 Register wirte only once, but activate TPIC7218 ,the 0x12 Register will change in operation, pls help advise resolve the problem.
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TPS62260: The part is getting damaged.(Output gets short with GND)
Part Number:TPS62260
Hi,
We are using TPS62260DDCR part as DC DC converter in out products. It was found that the part's output gets shorted with GND.
Following are the design details with the existing:
1.) IC TPS62260DDC
2.) Inductor used is NLHF303012T-2R2. Find the link for datasheet download www.core.com.tw/search.asp
3.) Total Output Capacitance is 33uF.
4.) Total Input capacitance is 100uF.
5.) Divider used are R1=14K8(1%) and R2=3.3K(1%). For generating ~3.3V. External Feed forward Capacitor used(C1) as 22pF.
Here the layout is not a concern as i have the EVB board as well with me. The same IC with EVB board gets damaged. As the output voltage gets short with the ground.
Here we are facing the issue from the field for the IC getting shorted to Ground. On analysis it was found that during power on the IC switching waveform of goes below 0V. Can this be the reason for the IC failure. As this is observed in the 5V to 3.3V generation.
Also it was found that the if the inductor is shorted the IC gets damaged. This was the case when Vin=5V and Vout=3.3V(Iout = 300mA). This was repeated 5 times. Every time the IC was shorted.
While in case Vin =5V and Vout=1.2V(Iout=300mA), if inductor is shorted, The IC gets intoshutdown mode and recovers back properly. This was repeated 10 times no damage were observed.
Can you suggest the reason for above and the observation. Is there any issue in the part?
Also we need to know the internal N-Channel MOSFET ratings?
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LP5036: Package drawing information
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BQ24620: NIMH 8 series cell application
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BQ27426: BQ27426 reverse capacity and averaging GG
Part Number:BQ27426
HI Team
My customer
Reserve capacity.
My customer want some margin for GG.
For EX, set the system voltage 3.0V, reserve capacitance is 100mAH.
They hop SCO=0% at 100mAH.
Is it possible bq27426 ?
SOC averaging.
Is it possible that controls the SOC update speed by control of GG?
They want to know if there are some command to control update timming ?
best regards K.Kanao
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BQ27220: bqStudio GPCPackager
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BQ25504: How to set the voltage thresholds ?
Part Number:BQ25504
Hi i'm new to energy harvesting ICs. I need to switch on power to the load when the capacitor/supercap reaches 3.3V and cutoff power to the load when discharged to 2.7V.
Is this possible using the BQ25504 ? what do I need to change ? is a BQ25505 better for this purpose ?
How can I change the two voltage thresholds ?
(assume a solar power source)
thanks
Rosh
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LM3549: LED Driver with Lithium battery
Part Number:LM3549
Hi!
Datasheet says it's driver works with power 5.5 - 3.1 V.
Driver starts to work unstable and don't gives 350mA current (~120 mA extremely unstable current) when i take a battery as powersourse and voltage falls to 3.65.
Where i was wrong?
The power scheme was typical, as in the specification.
Datasheet says it's driver works with power 5.5 - 3.1 V.
Driver starts to work unstable and don't gives 350mA current (~120 mA extremely unstable current) when i take a battery as powersourse and voltage falls to 3.65.
Where i was wrong?
The power scheme was typical, as in the specification.
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TINA/Spice/LM2596: Getting problem in simulation
Part Number:LM2596
Tool/software:TINA-TI or Spice Models
Hi
I am having problem in Ltspice simulation of LM2596-12 model.
It is not working properly.
I have provided following values:
VIN=24V
VOUT=12V (Required output)
Kindly help to resolve this issue.
M i used wrong values of components.
I have tried with cin = 22uf and cout =100uf , L1= 33uh/68uh
but the result is same.
Thanks
Pallavi Joshi
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TPS61282: Current limitation of TPS61282
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TPS23753A: 24Vout by Isolated Flyback
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TPS650864: Question about the output voltage of Buck1 in TPS6508641
Part Number:TPS650864
Hi team.
My customer used TPS6508641 for Xilinx soluton.
They designed circuit as the below.
But, The circuit didn't output voltage 5V.(Output voltage is about 4.75V)
They are follow the TPS6508641 block(Figure 6-9) in datasheet as the below.
What's wrong with us?
Thank you.
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TPS7A16: ESD protection schematics inside TPS7A1633-Q1 I/O pins
Part Number:TPS7A16
Hi team,
I'd like to confirm the ESD protection schematics of TPS7A1633-Q1. It's need for how the voltage sneak to another pins inside the TPS7A1633-Q1.
Could you tell me the schematics of ESD protection?
Regards,
Nishimura
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TPS53219A: ripple voltage level
Part Number:TPS53219A
Hello,
Our customer asked about the appropriate ripple voltage when he chooses ceramic capacitor on output. Could you please let us know if 10mV ripple voltage described in page-20 is reasonable.
Best regards,
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TPS65910: AM3358BZCZ80 + TPS65910A3A1RSLR - VRTC power consumption issue
Part Number:TPS65910
Dear Sir,
We use AM3358 + TPS65910A3A+coin-cell backup BAT(220mA 3.2V) for our board.
when main power is off, We use VRTC only mode of TPS65910A3A that backup BAT current is 253uA. so the backup BAT life time is just 1 month.
how to decrease backup BAT power consumption??
(Please visit the site to view this file)
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