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Thread: Cnx-p1900 19.5v?

  1. #1
    Variable Bitrate kelmk's Avatar
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    Cnx-p1900 19.5v?

    I need a shutdown controller and DC power supply for my Sony Vaio Laptop. It requires 19.5V 4A.
    The CNX-P1900 looks like it outputs at even voltages 19V,20V. Will 19 or 20 V work is the laptop wants 19.5?
    Any other shutdown controller that does 19.5V?

  2. #2
    Variable Bitrate
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    Yeah it should work fine.

  3. #3
    Variable Bitrate billmee's Avatar
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    Quote Originally Posted by rgarjr View Post
    Yeah it should work fine.
    Agreed

    You could drop the 20 across a diode to drop a partial volt,, a silicon diode will drop it 0.7v to 19.3vdc.

  4. #4
    Variable Bitrate kelmk's Avatar
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    Thanks. Would this be a better way to go then getting a DC-DC 12V supply and then using a 19.5V laptop car adapter?

  5. #5
    Low Bitrate
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    The P1900 install doc says it puts out +19.5V when jumpers are set for +19V.
    Mine is set for +18V, but tests at +18.5V

    Here it is verbatim:

    "JP6 allows you to select the output voltage that appears on the Primary Output (J2 Pin 4). The selections are +18V, +19V, or +20V as shown below. Note: the actual voltage is set approximately .5 Volts higher to compensate for any wiring losses you may have in your installation."

  6. #6
    Variable Bitrate kelmk's Avatar
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    Does this thing work as a startup/shutdown controller or do I need something separate for this?
    It says it handles standby/resume but doesn't say anything about hooking into my power button.

  7. #7
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    You'll have to hack it into your power button.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
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  8. #8
    Variable Bitrate
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    its a S/S controller and you can hook up to the power switch

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