BQ25890: Charge for two battery
Part Number: BQ25890Our smart phone have two battery, main battery and the secondary battery.Normally, the main battery are used for system power. If the main battery is pulled out, it can be switched...
View ArticleBQ40Z80EVM-020: bQ40Z80
Part Number: BQ40Z80EVM-020Could you please publish CAD (Altium) files for bq40z80EVM Li-Ion Battery Pack Manager Evaluation Module?Is there any refernce design available ?
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BQ24038: Battery Temperature Monitoring
Part Number: BQ24038Dear all For the datasheet, it said V(LTF) and V(HTF) thresholds (0.5 V and 2.5 V) 1. Could you share me that the relationship between temperature with voltage on the...
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PSRR of TPS717xx
My question is about this app note linked below .http://www.ti.com/lit/an/slyt280/slyt280.pdfMy question is how does this formula come from?
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LP3879: The output of the LP3879MR-1.2/NOPB has higher ripple voltage
Part Number: LP3879Hi,We are using LP3879MR-1.2/NOPB for powering a TMS320F DSP processor 1.2V core. When we started testing the LDO, the ripple voltage on the output is almost 100mV peak to peak at...
View ArticleLM2841: ESD/FTB/EMI performance and test standard ?
Part Number: LM2841Dear TI Experts,May I know below performance of LM2841? and which IEC standard during the relevent test? Thanks a lot.ESD: IEC ?FTB（Fast Transient Burst）: IEC ?EMI :
View ArticleLV2842XLVDDCR ESD/FTB/EMI performance and test standard ?
Dear TI Experts,May I know below performance of LV2842XLVDDCR ? and which IEC standard during the relevent test? Thanks a lot.ESD: IEC ?FTB（Fast Transient Burst）: IEC ?EMI :IEC ?
View ArticleTPS63020EVM-487: Inquire TPS63020 EVM can't support 3.3Vo@2A
Part Number: TPS63020EVM-487Hi Sir,Currently my customer test TPS63020EVM, Vin=2.6V, Vo=3.3V, and they would like to support output current to 2A.But TPS63020EVM can’t support 2A load, and we can’t...
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UCC24612: UCC24612 VDD power supply
Part Number: UCC24612Hi team,I have a question about the UCC24612 VDD power supply. In our datasheet picture, the VDD is powered from Vout through a Diode and resistor. But in our EVM schematic, a...
View ArticleBQ25895: Can I set VINDPM below full charge voltage?
Part Number: BQ25895Hi,if I set VINDPM=3.9V, full charge voltage=4.1V. When battery voltage is above 3.9V. Is it true that charge current will decrease to 0A before VBUS falls to the battery voltage...
View ArticleTLC5928: 24V plus with TLC5928 - can bigger LED strings be driven?
Part Number: TLC5928Hi,I want to use the 5928 for 7 segment drive in some large LED numbers - These have 10 series LEDs in and need 24V minimum as an Anode voltage. The data sheet ( indeed nearly all...
View ArticleCSD95372BQ5M: CSD95372B
Part Number: CSD95372BQ5MCSD95372B -Problem: Vin min=4,5v? U LiIon battery=3-4V .Question: Can the CSD95372B work with an input voltage in the range of 3-4v?
View ArticleBQ25895: what's the refresh threshold for BTST?
Part Number: BQ25895Hi,in the datasheet Vbtst-Vsw will be compared with Vbtst_refresh.But I can't find the value of Vbtst_refresh.My customer observe VBUS=4.3V when adaptor is removed, and the battery...
View ArticleBQ76940EVM: Maximum & minimum cell balancing current for 76940 part
Part Number: BQ76940EVMDear All,Maximum & minimum cell balancing current for 76940, 76930 & 76920 part , please share.As per datasheet, it is showing 5ma, 5ma & 70ma respectively. Please...
View ArticleUCC21540: UCC21540 DT is connected to VCCI, logic problem
Part Number: UCC21540Dears,As SPEC in the 9.3.2 Input and Output Logic Table on page 21 of the Technical Manual, the DT pin should be directly connected to the VCCI. The INA and INB should be...
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TPS65132: TPS65132EVM doesn't output negative voltage
Part Number: TPS65132Hi, teamI connect the measurement according to the datasheet as below. The positive output voltage is normal, but there is no negative voltage output. I have made sure the negative...
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BQ24196: Ibat quiscent current @ high-z mode disabled and no VBUS
Part Number: BQ24196Hi,I want to know the quiescent current through BATFET when high-z mode is disabled and no VBUS, while the BATFET is on.Is there any big difference for the quiescent current between...
View ArticleBQ27421-G1: State of charge is inaccurate after first startup.
Part Number: BQ27421-G1Hi,we are working with the BQ27421-G1 fuel gauge and we could observe a strange behavior regarding the state of charge.The fuel gauge is used with a custom hardware design that...
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TPS73201-EP: About layout guidelines
Part Number: TPS73201-EPHello,I have a question about layout guidelines.Most LDO datasheets shows the layout guideline "TI recommends designing the PCB with separate ground planes for VIN and VOUT,...
View ArticleBQ24160: bq2416xx Charging Profile
Part Number: BQ24160Hi,Figure 10. Typical bq2416xx Charging Profile in the bq2416xx data sheet turns off the battery FET after charging is complete.After this, if HZ_MODE = 0, is the SYS output...
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