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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The battery voltage will not exceed 30 volts. I tried ramping inw139 the battery voltage through datassheet PSU no solar panel connected and at one volt, the current draw is already about mA.
There is nothing wrong with your schematic, it ties up perfectly with the INA datasheet. Post a good photo of front and back of your PCB or breadboard. Not even a single miliamp. What could be going on here?
INA139 current monitor draws too much current
Odysseas Member Oct 21, Thanks for any help. 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. To sense the current coming from the solar panel and going into the dafasheet, I use two INA current monitor chips.
Try to keep front and back photos the same size. Hi everyone, I’m trying to build a solar charger, using a simple boost configuration. From the data sheet: Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Click here to register now.
Forums New posts Search forums. At one point, D4 wasn’t populated yet and the left hand side INA didn’t draw too much current. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Pioneer Elite vsxtx water damage no power Started by Watin Today at Media New media New comments Search media. However, the current monitors start drawing way too much current the instant power is applied. Welcome to our site!
This would suggest that the problem only appears when pins 3 and 4 on the chip see any voltage above ground. Articles Top Articles Search resources.
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Thread starter Odysseas Start date Oct 21, 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. INA current monitor draws too much current.