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LMR14020: Could we use Simple Switcher device with inverting buck-boost...
Part Number:LMR14020Hi teamsI am seeking a device to generate 20V to negative 12V output power rails.Inverting buck-boost topology is the only topology i known can meet this requirement.I have found a...
View ArticleBQ24133: BQ24133 can't charger issue
Part Number:BQ24133 Dear all: Customer used BQ24133 for 2 CELL charger. When customer do the 12V power plug in/out test, it is found that the charging IC has a chance to stop charging. STAT...
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BQ24600: Battery Detection Issue
Part Number:BQ24600Hi,BQ24600 IC is been used in the charging circuit for one of our application. I've been facing an issue of battery charging!! The pack is not getting charged!The circuit is designed...
View ArticleLM2775: Difference between LM2775 and LM2775-Q1
Part Number:LM2775What is the difference between these two parts ? Are there issues with the LM2775 I should be aware of ? I am asking because it seems LM2775 is still available but 'until end of...
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UCD3138HSFBEVM-029: When secondary rectifier uses a soft start, there is a...
Part Number:UCD3138HSFBEVM-029The secondary rectifier adopts soft start. The no-load start-up waveform is shown in the figure below. What problem can cause this startup waveform?
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TPS65175: How to modify the sequence between EVEN and VST
Part Number:TPS65175Hi, TeamMy customer is using TPS65175. They find the rising edge of EVEN (pin 46) is 1.8s delay from VST (pin 45) signal. They need rising edge of EVEN comes earlier or same time as...
View ArticleLM5121: LM5121-PCB PLACEMENT
Part Number:LM5121Hi,In high side mosfet side iam using schotky diode for improving efficiency, In PCB placement i placed HIGH SIDE MOSFET at top side and schotky at bottom side , is there any issue...
View ArticleLM3644: LM3644 can work without Inductor?
Part Number:LM3644Dears, My customer want to use LM3644 without Inductor. Is it ok?ths
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TPS549D22: TPS549D22 supplies 14 pcs DDR VDD
Part Number:TPS549D22Hi,I'm considering design a 12Vin to 1.2Vout/21A power supply by TPS549D22. It will supply 14pcs of DDR4 VDD, as the space is very limited. The part number of DDR4 is K4A4G165WE...
View ArticleLM5170-Q1: The LM5170-Q1 Design Calculator
Part Number:LM5170-Q1Hi,Can someone please send me the download link for LM5170-Q1 Design Calculator excel file.Thanks in advance.
View ArticleBQ51013B: FOD resistors calculation
Part Number:BQ51013BIt seems there is a software tool to calculate the FOD resistors for bq51013b. However the "tools / software" tag in bq51013b webpage has been greyed out. Could anyone share the...
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LM5050-1: LM5050-1 Leakage question :
Part Number:LM5050-1LM5050-1 Leakage question :follow below pic circuit, PWR2 provide DC 24V and PWR1 is open, then U4 LM5050-1 turn on MOSFET and offer DC24V for Systme ,But we detect DC1.2V in PWR1...
View ArticleUC1846: UC1846 problem
Part Number:UC1846Hi SirI am interested in the uc1846 chip in which I found the characters which could be controlled by external PWM signal on sync feet ( pin10) ,meanwhile the CT feet (pin8) need to...
View ArticleUCC37321: UCC37321, UCC37322 max "in" pin voltage
Part Number:UCC37321Dear TI experts,I want to make 2x ucc37321 being in parallel that is connected directly to eachother pin for pin in order to enlarge the output current , Is that ok ?Thanks,John
View ArticleTPS61099: TPS610994 problem
Part Number:TPS61099Dear SirSPEC show 600 nA Ultra-Low IQ into VOUT Pin400 nA Ultra-Low IQ into VIN PinWhat is total Iq ?I design a boost circuit with TPS610994 , Vin = 3.6V ~ 2V , Vout=3.3VHow about...
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WEBENCH® Tools/LM5022: LM5022 design report not printing
Part Number:LM5022Tool/software: WEBENCH® Design ToolsHi,I designed and simulated successfully for LM5022. But if I try to download the design report, I just get Printing Report in WEBENCH beta but no...
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LM5160A: Flybuck practical Circuit not working as simulation results
Part Number:LM5160AHi I'm designing a Flybuck DC-DC converter using the LM5160A. The design has an input voltage in the range of 25 V to 45 V. I have designed for an output of 12.5 V on the primary...
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TPS562200: Feed Forward Capacitor
Part Number:TPS562200Hi,We got a question from the customer about TPS562200.Could you help us?[Question]They would like to make sure about the revision history. The sentence of Cff is delated in...
View Articledesign and analysis of a full bridge resonant tank LLC DC-DC converter
I've designed a half bridge resonant tank LLC that control IC is L6599 and specification is blow:input voltage: 380Vdc - 400Vdcoutput voltage: 60Vdcoutput power: 600Wand I'll design a full bridge...
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TPS25926: Start up waveform
Part Number:TPS25926Hi team,My customer observed startup waveform which has a step in beginning, this was captured after they insert a fan module in the output of TPS259261.If there is no fan module,...
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