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Thread: BIOSTAR IP45 Vdrop mod

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  1. 08-05-2008, 01:50 AM #4
    Johnny Bravo
    Johnny Bravo is offline
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    My board has arrived - vdroop is covered, vcore soon. Will try and get pics up later today.

    ISL6334 PWM controller

    Vdroop - between pins 14 and 15 I measured it to be around 18.8Kohm so I'd recommend starting with a 100Kohm variable resistor.

    Vcore - you could go down the usual variable resistor between FB pin and ground but this controller does have other voltage offset capabilities. I have found that the OFS pin has been tied to ground via a resistor. If this resistor was replaced with a variable resistor and the resistance increased you can increase the output voltage. Decreasing Rref did not seen to affect output voltage.

    Stay tuned

    John
    Last edited by Johnny Bravo; 08-05-2008 at 01:57 AM.
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