thanks, i found that on page 67 i have only input V+ 16V (this laptop has 16V adapter) but no output on that MAX1631 IC. I have some small voltages coming of but nothing above 1V
...the quieter you become the more you are able to hear...
thanks, i found that on page 67 i have only input V+ 16V (this laptop has 16V adapter) but no output on that MAX1631 IC. I have some small voltages coming of but nothing above 1V
What are the voltages on pins 9,21,23 of U41?
What are the voltages on pins 52, 57, 59 of U61?
"System Current Sense
An uncommitted differential amplifier is provided for additional
high side current sensing. This amplifier, AMP2, has a fixed gain
of 50 V/V from the SYS+ and SYS– pins to the analog output at
ISYS. ISYS has a 1 mA source capability to drive an external
load. The common-mode range of the input pins is from 4 V to
VCC. This amplifier is the only part of the ADP3806 that
remains active during shutdown. The power to this block is
derived from the bias current on the SYS+ and SYS– pins."
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