LM3405: LED PWM Dimming Ratio
Part Number:LM3405Hi My customer would like to know the mean in the description of datasheet 7.3.5 of LM3405. The last sentence says "The dimming ratio reduces drastically when the applied PWM dimming...
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BQ40Z80: lost communacation when setting TSint & TS4
Part Number:BQ40Z80Dear TI Experts,My customer is evaluating with 4800_0_02-bq40z80.bqz +bqStudio 1.3.86+EV2400+BQ40Z80EVM-020 , after setting TSint & TS4 to 1, the commucation will lost and can't...
View ArticleUCC21520: Reason for UCC21520A Device failure showing Impedance between INB...
Part Number:UCC21520Hi,I am using UCC21520A as half bridge gate driver IC with 15V Vcc supply.VDDA supply =6.5V(Bootstrap supply regulated by LDO TPS7a1601).Device gets failed twice.Both the time,The...
View ArticleTPS25200: Rise time
Part Number:TPS25200Hi,My customer requires that rise time is below 1ms.If capacitive load is small, can it achieve this requirement?If yes, how much is the capacitance achieving requirement?Best...
View ArticleSolar charger circuit for 6 to 24V solar panel to get 5V output and have a...
Hi. I would like some advice on solar charger circuits. We need to be able to use 6V, 12V or even 24V solar panel and get 5V. We also need to use a lithium battery backup. Can you please recommend the...
View ArticleTPS61202: The limit of input current.
Part Number:TPS61202Hi teams,My customer wants to know ｗhat is the rated value of the peak current of TSP 61202?The datasheet describe the average current only, Please let me know as a reference...
View ArticleTPS53659: TPS53659 I2C built-in glitch filtering by default on I2C input pin?
Part Number:TPS53659Hi Sir,TPS53679 also having a comparator with hysteresis to meet the electrical specs in the SMBus or not?Hugo
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BQ24133: OPERATION LOGIC
Part Number:BQ24133Hello again,Here I have a problem. When calculating Duty Cycle, I gained (13/12) 1.083 which is greater than 1. For I Cin Calculation there is square root of a negative figure.How...
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BQ24232: Charging is suspended due to a battery pack temperature fault,
Part Number:BQ24232Hello Customer setting around 60°C on TS pin to monitor battery pack temperature. While over 60°C battery pack temperature, customer indeed find charging suspend. But they...
View ArticleBQ25505: On operation when VSTOR voltage is low
Part Number:BQ25505Hi teams,When the BQ25505 charge the capacitor (1F) from empty, the VSTOR was gradually increases.Perhaps as the timing of capacitor charged, it became a square wave of about 8...
View ArticleTPSM846C23: The variation of Vout
Part Number:TPSM846C23Hi,We got a question from the customer about TPSM846C23.Could you help us?[Question]How much is the variation of Vout at below conditions? Rset=10k Tj=-40~125CWe assume we should...
View ArticleHow can host(MCU) control device enter into shutdown mode with command?
Hi, As I known,device(bq20z75) can enter into shutdown mode when write 0x0010 in Manufacturer Access.but ,how can host(MCU) control device enter into shutdown mode with command? we can read...
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TPS23861: Power on sequence
Part Number:TPS23861Hello For TPS23861 power consideration, VVPWR rise to 18.5V before VDD 3.3V tthen rise RESET_N to 0.9V, right? if VDD 3.3V rise before VVPWR up to 18.5V, has any effect...
View ArticleUCC28083: ESD : Human body model (HBM) rating
Part Number:UCC28083Team,Do we have the HBM (Human body model) rating for the device?What information are available regarding the ESD protection/tolerance/testing of the device?Thanks in advance,Anthony
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BQ27426: What's recommend range of Rsense value?
Part Number:BQ27426Hi,What's recommend range of Rsense value? It recommend 10mohm in datasheet. I want to change 5mohm. Is it suitable for SRN-SRP? Meanwhile, would you provide recommend value for...
View ArticleBQ76PL455A: BQ76PL455A Measure voltage?
Part Number:BQ76PL455AI want to Measure 16 series Bat Voltage,BQ76PL455A can Measure Each battery voltage? if not,Please help to recommend PN? Tks!
View ArticleTINA /香料/ TPS54240： the TRACKING function
Part Number:TPS54240Tool/software:TINA-TI or Spice ModelsHelloI download a file to simulate, but the SS/TR can't be adjusted by an external voltage.The TRACKING function doesn't work.Both of...
View ArticleTPS62088: leakeage when Vin lower than Vuvlo
Part Number:TPS62088When Vin is lower than Vuvlo we see a leakage to gnd, the leakage is in the range of mA and increase with temperature. We are not using the device but it is an issue that it...
View ArticleEMB1428Q: how can i know the EVM is balancing
Part Number:EMB1428QHi，dearI‘m using 1402EVM to test battery active balance function.The 1402EVM board is powered on and starts working, LED D15 lights up.I use a other MCU connect to EVM, not...
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