I am seeking a charger includes below spec:
VIN 5V
Charging current 1A
Battery 4.2V
IC package around 3x3mm
LED function (charging/full charge/low battery alarm)
control mode: Stand-alone
can you give me suggestions ?
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seeking charger solutions
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TPS40428: TPS40428 PG pin waveform,not to use PMBus to control Voltage ripple r ange 10mVpp
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TPS40170: TPS40K compensation calculator tool
Part Number:TPS40170
Hi team,
I used a compensation calculator tool for TPS40170.
(TPS40KType III Loop Stability kVenable_sluc263c-071312.xlsx)
1. I entered a data in "VIN".But R's and C's value didn't change.
(Nothing has changed about it compared to before)
Does "VIN" item has related for compensation calculator?
2. This tool can use ceramic capacitor.
when I enter a data in "output ceramic capacitor",
Should I need to consider "DC Bias" for ceramic capacitor?
Regards,
keisuke
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UCC28780: UCC28780+GaN+UCC24612 SR MOS damage
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TPS22976: How to handle of unused pins?
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TPS546C20A: tps546c20a PMbus issue
Part Number:TPS546C20A
tps546c20a PMbus issue
Does PMBUS initialize every time you power up the tps546c20a?
How to set up PMBUS?TPS546C20A to restart after Power off?
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LM3880-Q1: maximum pull up resistor for LM3880-Q1
Part Number:LM3880-Q1
Hello team,
My customer wants to decrease quiescent current at standby situation for LM3880-Q1.
LM3880-Q1 output should be 'L' at standby.
So, The current is needed not only LM3880-Q1 Iq but also though external pull up resistor current.
The datasheet mentions to use 100kohm.
However, the customer wants to decrease the current.
Could you please provide the maximum pull up resistor value for decreasing the current?
Best Regards,
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BQ34Z100-G1: BQ34Z110 vs BQ34Z100-G1
Part Number:BQ34Z100-G1
Hello,
we use component which is not recommended for new design. We use BQ34Z110 with two Pb accumulators (12V 7200 mAh in the serial connection of accumulators). In the future, when we will not able to buy BQ34Z110 we will have to migrate BQ34Z100-G1. Do you have any recomandation how we should do this migration? Does exist any technical sheet with changes beetween components BQ34Z110 and BQ34Z100-G1?
Thank for your help, best regards
Tomas Samek
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LM5021: about vertical current limit stop
Part Number:LM5021
Hi,
Does LM5021 have vertical current limit stop?
And, our customer has plan to design isolated dc/dc. That input in DC400V - DC1000V, output power is 10W.
They found the TIDA-010000, however this design has current buffer. They are conserned about switching delay and power loss at turn.
Could you let us know information for ideal TI's solution?
Regards,
ACGUY
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TPS63020: Phase margin improvement method
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SMPS-Test Plan and procedure for bring up and validation
Hi Everyone,
Greetings !!
Iam new to the power supply design. We have designed power supply with UCC28064A and UCC256301 IC (PFC+LLC IC). Almost all design part are completed and now planning to start the testing . Before that want to know how start the bring up for these kind of power supply board since it is having high voltage i dont want to burn my board.
Want to know what is general method followed in design bring up by designer across this field.
Share your suggestion and if there is any procedure/Test Plan available to this IC's please share.
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LM76202-Q1: footprint
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TPS40210: TPS40210 for 12~24V to 24V 6A design
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LMR23630: Do you have any device same pin assignment as LMR23630 and adjustable soft start implemented?
Part Number:LMR23630
Hello guys,
One of my customers is evaluating LMR23630ADDA for their new products. But the LM23630A is into hiccup mode in the evaluation because their load capacitance connected to output of LMR23630 is very big. So the customer is looking for any device can adjust soft start time with same pin assignment as LMR23630ADDA. I know the the device doesn't have NC pin. so I think it may be difficult to find such device. But we need your help. Could you please give me your reply or comment? Your reply would be much appreciated.
Best regards,
Kazuya Nakai.
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TPS23752: How to generate PWM in TPS23752 between PWM and VFO mode
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BQ21040: Need understanding
Part Number:BQ21040
Hey Hi ,
I am designing one application , in which Power Supply is always connected to system.
All I need is the emergency backup supply when their is no Power Supply using Lithium ion cell.
So I need some understanding for BQ21040.
1. Since my application will run continuously , how will the Timer of BQ21040 will be reset after first complete charge when battery will be self discharged after some time, since their is no removal of battery nor it will communicate with the host controller.
2.Since it is given that Charging will again start when "OUT terminal voltage drops 100mV below regulation" i.e. when battery voltage drops below 4.1V , if this is the case , will battery health be affected since its charge discharge cycle is not completed properly? or is there any way for setting up the "Refresh Threshold"?
3. Or if this is not the proper IC for such application then please kindly suggest me the Appropriate IC and which will be available.
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TPS61500: May TPS61500 can support 5Vin Vout 24V Iout 400mA?
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BQ25890: What is the power consumption per each ADC conversion on battery voltage?
Part Number:BQ25890
Dear E2E,
What is the power consumption per each ADC conversion on battery voltage?
BR,
Jason
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UCC28950: UCC28590 PSFB at light load can't ZVS
Part Number:UCC28950
The PSFB in the light load behind the arm how to enter the ZVS countermeasures
Please refer to the following test waveforms
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BQ77PL900: Balancing questions
Part Number:BQ77PL900
Hi Ti.
I have some questions about BQ77PL900's cell balancing operation.
Please let me know.
1. I already knew cell balancing is operated in VOV ~ (VOV – ΔVOVH), But when discharging, cell balancing is not working?
2. Is there any spec about cell voltage difference or cell imbalance voltage threshold?
3. At normal state, the one cell's voltage is drop 0.1V. Is this right?
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