pendent and can range from V to 40V for the INA and. V to semiconductor products and disclaimers thereto appears at the end of this data sheet. The INA and INA are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and. Texas Instruments INA Explore Texas Instruments on Octopart: the fastest source for datasheets, pricing, specs and availability.

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Initially, I had only the right hand side INA populated, then only the one on the left side of the schematic – both show the same behaviour. At one point, D4 wasn’t populated yet and the left hand side INA didn’t draw too much current.

INA139 current monitor draws too much current

Odysseas Member Oct 21, Articles Top Articles Search resources. You must log in or register to reply here. However, the current monitors start drawing way too much current the instant power is applied.

Thanks for any help. From the data sheet: Forums New posts Search forums. This would suggest that the problem only appears when pins 3 and 4 on the chip see any voltage above ground.


INA139 Datasheet

What could be going on here? Try to keep front and back photos the same size. I checked for short circuits and everything, nothing. Datashret continuing to use this site, you are consenting to our use of cookies.

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Welcome to our site! Media New media New comments Search media. As it’s not, I’d very carefully check the pin connections and orientation of the ICs, a track fault or pin swap is the most likely problem. One has now disappeared in smoke. To participate you need to register. datasheeg

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Dattasheet starter Odysseas Start date Oct 21, INA current monitor draws too much current.


To sense the current coming from the solar panel and going into the battery, I use two INA current monitor chips. I tried ramping up the battery voltage through a PSU no solar panel connected and at one volt, the current draw is already about mA. Not even a single miliamp.

INA Datasheet(PDF) – TI store

Datasheets, Manuals or Parts. I’ll triple check the pinout again. Odysseas Member Oct 22, Replacement Transformer Started by ncag Today at 7: So, to determine whether the IC itself is defective, tie both inputs together essentially shorting the current sensing resistor and see whether the IC repeats the anomalous behavior. Hi everyone, I’m trying to build a solar charger, using a simple boost configuration.

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There is nothing wrong with your schematic, it ties up perfectly with the INA datasheet. The battery voltage will not exceed 30 volts. For a better experience, please enable JavaScript in your browser before proceeding.