RH1965 Power Supply Ripple Rejection (over varying frequency)
The datasheet only specifies the power supply ripple rejection for 120Hz.Is there data at higher frequencies (100kHz to 1MHz)? Is the performance close to chips such as LT3042?
View ArticleSpikes at output of DC-DC converter.
Hi Every one.I am attaching a image regarding my problem.When I switch ON/OFF any FAN or any other item in the same AC line, Output of DC-DC converter disturbs. What could be the problem for this? and...
View ArticleLTC2966 ltspice result under VinA =VinB=0
HiI have quetion for LTspice simulation result. Condition is reference circuit.(open this macromodel's fixture in LTC2966)VinA=VinB=GND result:OUTA=Low OUTB=Low But under VinA=VinB=0V ,this IC don't...
View ArticleLT8645s efficiency measurement
I would like to measure power consumption of LT8645S on LTSpice, but the result is not realistic. I found 11W average power on LT8645s instead of 1W on LT8646s for the same schematic.
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LTspice model for LTC7001
The DataShhet of LTC7001 defines the internal charg pupm to 12VDC.The simulation set this value to 7V if Vccuv is open and 3.5V if this pin is short to GNDIs it a problem of the simulation ?any...
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Unstable output of LTM4630
I designed a 0.9V 36A power circuit for my FPGA using LTM4630. The design refered to the circuit given in Figure 24 of the datasheet. The detail is given in the following figure.where C115 is 2.2uf...
View ArticleLM4368 - Problems with added EMI filter
Hi. We are using an LM4368-2 designed to the following specs:UV protection = 10.8VOV protection = 36V (actual value is 35.6V)OC protection = 8.9A1200ms cooldown Firstly, this is how our circuit behaves...
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LTC4011
Hi I have a question LTC4011. 1,Disconnecting the battery during charging will result in the following operation.Is there not a problem?The thermostat (70 ° C ± 5 ° C) is built in the battery, and it...
View ArticleLT1931AES5#TRMPBF ESD rating & MSL LEVEL
Could you please tell me LT1931AES5#TRMPBF ESD rating & MSL LEVEL?
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LT3501 : 6 VDC to 5 VDC step down Switching Regulator
Hi I have used LT3501 for 6VDC to 5VDC , 1 A conversion . I am getting a drop in 1.5V and maximum output voltage of 4.5VDC. Is there any possibility to improve input/ out put ratio, to reach...
View ArticleLT3518 Open LED protection
Hi,My customers are considering LT 3518.So I got a question. #1 Although there is description "open LED protection" in the feature portion of the data sheet, How do you protect Open LED? The...
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PoE Injector Port Power
Hi,We are using DC2685A Evaluation Baord for 4 port PSE Devices.Questions :-1)Could it deliver Power up to 71.3W at Each Individual Port or 71.3W in Total by adding all the Port Powers. Above is the...
View ArticleLTC2945 supply setup for negative voltages
I have several negative supply voltages I need to monitor (-2V, -5V, and -30V). Looking at the block diagram (p. 9)... if I'm connecting the negative supply to the GND pin, am I correct in assuming...
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2 cell battery charging with multiple inputs
HelloI am adding another power input and a charger to an existing product and the input circuitry is starting to get unwieldy. I am looking for suggestions to simplify. There are three power sources, a...
View ArticleΘja, Θjc and Pd of LT4295HUFD#TRPBF
Dear Sir: I am confirming the Θja, Θjc and Pd of LT4295HUFD#TRPBF.I only find Θja data(Θja=43) now. Cloud you provide other data to me?Thank you very much.
View ArticleΘja, Θjc and Pd of LT4321HUF#TRPBF
Dear Sir: I am confirming the Θja, Θjc and Pd of LT4321HUF#TRPBF.I only find Θja data(Θja=47) now. Cloud you provide other data to me?Thank you very much.
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lt3905
nice meet you, about technical issue as below :1. about LT3905 Page.18 application circuit. its APD output current "1mA" , how to design or calculation? the "1mA" current, that can be adjusted?...
View ArticleNo-load quiescent current of ADP5304
Hello, I have a question about the quiescent current of ADP5304. The output is set to 1.8 volts and the input is 3.6 volts. For the sake of meeting the spec about 180 nA with occasional switching,...
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LT8390 using parallel MOSFET
Hi Is there anything I should be careful of when using parallel MOSFET as attachment? Regards,Kazu
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