Current Sense methods in switching regulators
What current sense methods are used in switching regulators today? What are the advantages and disadvantages of each method?
View ArticleHigh-side current sensing at 120V
Hello,I am searching for a good idea to sense the current of 0 to 100 mA at a voltage level of 0V to 135V. The result should be a current to ground or a voltage respecive to ground. The first problem...
View ArticleSwitching regulator's output ripple.
Does higher output ripple of a switching regulator mean better transient performance?
View ArticleNeed recommendation for a dual supply converter solution for ada4938.
Does any ony know of a supply solution for +/-5 volt dual supply for noise sensitive ada4938 analog front end application?Application includes 18 total ADA4938's that need+/-5V. Any help is much...
View ArticleCan ADP5062 be used as a standalone charger?
Understand that ADP5062 is a programmable battery charger IC. However, I wonder if ADP5062 or ADP5061 can be used as a standalone charger IC without a MCU? By saying this, I mean without any connection...
View ArticleClik here to view.
12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit
Hello all.I would like to receive some suggestions of ICs / considerations about this design.The picture below states how this power supply should work. Details:1) IC 1 probably will be a LT3650-8.4...
View ArticleWhat are the advantages of current source vs current sink drive for Flash LED...
What are the advantages of current source vs current sink drive for Flash LED applications?
View ArticleADP2370 (LFCSP_WD) to DIP + 8 DSBGA to DIP
Hello everybody!Recently, I was interested in ADP2370 IC, but since I had never worked with it and since I am kind of an amateur newbie, I wanted to try it fist, but unfortunately could not find any...
View ArticleADP151 draws high current with output capacitor; outputs +0,2V without
Hi, I designed three ADP151 LDOs (two 2,5V and one 1,8V) into my latest circuit.Yesterday I got the PCBs and was suprised in a way. All three are drawing too high currents without loads. If I would let...
View ArticleWake up problem for your ADP3334
Dear Sir/Madam, I just designed with your ADP3334 LDO power. Why ADP3334 bring the output by step up voltage like my attahced scope picture?Our product meet the troubble by this step-up power supply.I...
View ArticleADP2120 operating in a discontinuous mode when synchronized.
I have an ADP2120 circuit that is operating it what looks like a discontinuous mode, but is synchronized to an input clock. The circuit is a 5V to 3.3 V circuit using the component values I got from...
View ArticleADIsimPower - input ranges
It seems that the tool does not state its limitations on user inputs. For example, if one enters 150V output requirement, the tool simply returns "Errors: Vout is out of range." It'd be useful if the...
View ArticleUsing ADN-8831 TEC driver with a 0.8V/1.8A TEC
Hello, I am very interested in using this IC to control an APD TEC that has maximum TEC ratings of 0.8V/1.8A. Looking at the specs of ADN-8831, I am guessing it can be used and I am thinking of...
View ArticleADP2504 Over-current
My customer will be using this part to driver an Led at 500mA Constant current, can you advise re the following two questions ? 1. The part has s/c protection built in but I cannot see a voltage clamp...
View ArticleBuck DC-DC converter ICs, with internal MOSFET and freewheeling diode ???
Hi.I am looking for a buck converter IC available in a small SMD package like SOT-23 (or other small one) to a power supply with these parameters: Vin = 16 to 30VDCVout = 4.4VDCIout = 250mA The maximum...
View ArticleTips for soldering a ADP2323 for a prototype
Apart from pre-warming this part at 125 degrees for 24 hours to remove any moisture does anyone have any recommendations to solder this chip onto a board ? I have allowed a 3 mm plated through hole to...
View ArticleRegarding Power supply isolation between RF ICs
Hello, I have in my design, a central 6 V supply from a buck converter and this is driving three 5V LDOs. 3 LDOs were selected to isolate the RFICs. LDO2 and LDO3 are powering a modulator and a...
View ArticleLT3796 vs LT3652? efficiency, max current etc?
Hi! It was with great interest I read Xin Qi's article in the July 2012 issue of Analog Innovation. We have been prototyping a MPT charger, based on the LT3652. It works well on the bench and in field...
View ArticleADP5065
I would like to use the ADP5065 stand-alone i.e NO Microcontroller interface. TheIIN_EXT = High for 500mA Vin limit My questionIf USB is present and the battery is NOT present, what voltage will...
View ArticleClik here to view.
Adjustable vs. fixed voltage option
Some parts are available as fixed output voltage options. Can I adjust the output voltage anyway?This is a question that comes up often with parts like the ADP2108, ADP2109 or ADP2138, ADP2139 that do...
View Article