BQ25700A: input voltage
Part Number:BQ25700AHi ， i want to confirm which pin is the supply for the chip ? REGN? VDDA ? VSYS or VBUS?when input Vbus power off, before the OTG mode start, there is 10ms gap, which voltage is...
View ArticleUCC28950: some questions about controller
Part Number:UCC28950I'm working on a project that contains a 5KW DC/DC converter.I’m making some design calculations based on datasheet (SLUSA16D) formulas and I have some questions.1. P. 40. eq. 30...
View ArticleTPS2543: Over-Current Protection w/o portable device
Part Number:TPS2543Hi Team,If portable device don't connect to TPS2543, Does Over-Current setting(based on CTL1-3, ILIM_SEL and ILIM_LO/HI setting) work well? or it will be 0.5A...
View ArticleClik here to view.
TPS25924: Reverse current protection, protection if Vout voltage is higher...
Part Number:TPS25924Dear Sir,Refer to page 20 of TPS25924 datasheet -> Figure 43. Inrush and Reverse Current Protection.Vin of TPS259241 will be the range of 4V~11V power rail and it will provide...
View ArticleLM74700-Q1: Spice model not function in LTSpice
Part Number:LM74700-Q1Hi,I'm looking for a spice model for the LM74700-Q1 which can be used in LTSpice. It seems that LTSpice can't handle the encrpted version which is available. Some other OR-ing...
View ArticleUCC256301: VCR voltage range
Part Number:UCC256301according to our design resonance capacitor voltage peak is 515 volt and valley voltage is -115v . but the Vcr pin can take only positive voltage and its range is (upto 6 volt) so...
View ArticleBQ24650: MPP Disable
Part Number:BQ24650Hi,Is there a way to disable the MPP function of the BQ24650? Disabling the charger is done by setting the MPPSET pin to below 75mV but I would like to disable the MPP function...
View ArticleClik here to view.
WEBENCH® Tools/TPS92515HV: Webench issue regarding PWM pin
Part Number:TPS92515HVTool/software: WEBENCH® Design ToolsHello,TPS92515 data sheet states Absolute Macimum Rating for PWM pin -0.3 to 5.5 V. Webench produces a design that conflicts with this...
View ArticleClik here to view.
LM5021: Doesn't startup properly - Unable to get more than minimum ON time...
Part Number:LM5021Hello,This is my first time designing an isolated power supply. I have the following specifications :Vin : 38 to 57VVout : 24V 30WHere is my schematic and captures of a few...
View ArticleLM74700-Q1: Spice model does not function in LTSpice
Part Number:LM74700-Q1Hi, I'm simulating ISO7637-2, ISO16750-2 pulses and reverse battery protection for a new design. All my simulations are made in LTSpice. Although I already found a lot of useable...
View ArticleClik here to view.
TPS65131: TPS65131 VNEG output -6V output ripple
Part Number:TPS65131Hi ti team, input 5V,output 6V/50ma,-6V/50mA for LCD, then test output find -6V output ripple is too high,SCH,PCB and output ripple as belowCould you pls help if there is...
View ArticleClik here to view.
CSD19538Q3A: Calculating Temperature when using pulsing
Part Number:CSD19538Q3AHi,I want to make a constant current LED driver with a MOSFET, shunt, opamp configuratie. The specs of the LED driver:Frequency: ≤100 HzForward current: 1 Apulse duration: ≤ 300...
View ArticleTPS56C215EVM-762: there is an audible noise by TPS56C215EVM at 5V to 3.3V...
Part Number:TPS56C215EVM-762Hi TI expert,I am Morris who is TI technician. I meet a technical problme on TPS56C215 EVM. I based on customer's request to modfy TPS56c215 EVM, the following is the bom...
View ArticleUCC2897A: Feedback Loop Compensation
Part Number:UCC2897ADear Gents,Looking at reference documents SLUA535 (section 6, Compensating the feedback loop) and SLUA702, I spotted notable differences in modelling of the active clamp circuit:In...
View ArticleLM5160-Q1: LM5160-Q1
Part Number:LM5160-Q1Hi. I want a 12V, 1A isolated output through the utilization of LM5160-Q1 in Fly-buck converter mode. The Vin range is 19 to 26V. I do not want to use the primary (non-isolated...
View ArticleClik here to view.
there is an audible noise by TPS56C215EVM at 5V to 3.3V application
Part Number:TPS56C215EVM-762Hi TI expert,I am Morris who is TI technician. I meet a technical problme on TPS56C215 EVM. I based on customer's request to modfy TPS56c215 EVM, the following is the bom...
View ArticleClik here to view.
TLC5943: GS Data Greater than 0300h
Part Number:TLC5943Team,After erasing the micro-controller driving the TLC5943 LED driver and having a pull-up on the BLANK input signal, some of the output channels are still ON. Looking on the data...
View ArticleLM3481: LM3481
Part Number:LM3481HelloI am a new designer and i'm working on a new design with the LM3481 to create from a 12v input a 24v output with 1A Iout.I read the datasheet so i can understand how to design...
View ArticleTPS63070: Not Starting at VIN below 4V
Part Number:TPS63070Hi,I have integrated the TPS63070 into my design, and the details are as followsVin= 3.5V(Li+ Battery)/Solar Power 3.5W/6VLoad= <200mAVout (Set):5.5V using Programmable...
View ArticleClik here to view.
TPS7A49: Absoulte maximum ratings: OUT pin to IN pin voltage
Part Number:TPS7A49The datasheet of the LDO TPS7a49 specifies a limit of -36 ... 0.3V for the OUT pin to IN pin voltage. I am using the regulator with a relatively large output capacitance of 1mF and...
View Article