Comments by Claire

  • New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    - 21 March 2018

    Hi.

    At 36V in, the output current limit is just under 2.5A. The temperature levels off at about 140C with the inductor being the hottest part. The inductor's ripple current is high, but not higher than the output. By the way, we have some more characterization available on this similar product:

    https://www.pololu.com/product/2866

    That board has a 1.5uH inductor on it, and with 36V in and 2.5A out the RMS ripple of the inductor is about 1.35A.

    -Claire

  • New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    - 8 March 2018

    Hi.

    There is no single optimum inductance for all operating points, and in general, we need some balance of inductance, size, resistance, etc. for boards like ours that are intended to work over a wide range of operating conditions. We did lots of testing with that regulator and Micrel's evaluation board (which uses a 1.5uH inductor) to find the best values for all of the components within the constraints we were working with.

    -Claire

  • New MOSFET-based power switches

    New MOSFET-based power switches

    - 8 March 2018

    Yes, adding a 10k pull down sounds like it would do the trick.

    -Claire

  • New 5V step-up/step-down voltage regulator S9V11F5

    New 5V step-up/step-down voltage regulator S9V11F5

    - 15 February 2018

    Hi, Tom.

    We have not characterized the ripple or line regulation for these regulators, but both will depend on the exact details of your system, so if you wanted to be sure they would hold a steady enough 5V for your sensor boards, you would probably have to test them in your setup. If you want the cleanest supply, you might consider boosting from your 5V bus to 5.5V or 6V and then regulating linearly from there. If you have more questions or would like more advice on how these regulators might behave in your setup, I recommend posting more details about it on our forum.

    -Claire

  • New D24V150Fx 15A step-down voltage regulator family — our highest-power regulators yet!

    New D24V150Fx 15A step-down voltage regulator family — our highest-power regulators yet!

    - 14 February 2018

    Hi.

    We have not characterized these regulators with heatsinks, but you could try adding one to see how much improvement you would get. It would probably be most effective on the silkscreen side of the board above the two large FETs. Additionally, we have generally found forced airflow to be more effective than a heatsink alone. For fun one of our engineers designed a fan enclosure for these regulators and in some brief tests was able to get several extra amps out. If you have access to a 3D printer and want to try it out, you can download it from Thingiverse. If you do try that enclosure or heatsinking, we would be interested to hear how it goes.

    -Claire

  • New MOSFET-based power switches

    New MOSFET-based power switches

    - 30 January 2018

    There is only a direct connection between the CTRL pin and ground when the transistor connected to the OFF pin is turned on, and we warn on the switch's product page never to have both pins high at the same time. From your description of your capacitive switch it sounds like it would probably be more straight forward to just use it to directly control a MOSFET that can handle the current draw of your load. Could you provide more information about the touch switch?

    -Claire

  • New MOSFET-based power switches

    New MOSFET-based power switches

    - 29 January 2018

    Hi.

    You can supply up to the rated maximum VIN voltage directly to the CTRL pin on our pushbutton power switches (20V for the LV and 40V for the SV, MP, and HP) as long as you do not exceed the voltage you are supplying to VIN. Is your supply at least 12V? By the way, if you have not already noticed, the internal structure of the control pins on the switch is given in the "Using the Pushbutton Power Switch" section of the product page.

    -Claire

  • New product: G2 High-Power Motor Driver 24v13

    New product: G2 High-Power Motor Driver 24v13

    - 18 September 2017

    Sorry, we do not release that.

    -Claire

  • New product: G2 High-Power Motor Driver 24v13

    New product: G2 High-Power Motor Driver 24v13

    - 15 September 2017

    Hi, Nils J.

    We do not release the schematic for that driver. Is there some other specific information about the driver you are looking for?

    -Claire

  • New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    New Product: 5V, 5A Step-Down Voltage Regulator D24V50F5

    - 11 September 2017

    Hi, Brewster.

    It is generally bad practice to directly connect two voltage sources, so you should implement something to isolate your 12-15V rail from the output of the regulator. Appropriately rated diodes could work for that. Even when the regulator is off, it is not good practice to connect another voltage to the output, and you should definitely not connect more than 5V.

    -Claire

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