O2MICRO just for ref

[emaghanim]

oz 8681l
oz 8682l
pinout

[emaghanim]

Re: O2MICRO just for ref

8682 8681 oz8682 oz8681

[RichBon]

oz 8681l
oz 8682l
pinout

sir please what will be the voltage at pin 9

[mon2]

You can calculate this value using an online resistor based voltage divider.

However, from the referenced schematic, each resistor is @ 100k ohms so the pin # 9 voltage = 50% of Vin voltage. If it is not ~50% of the Vin voltage, then remove all power and measure the resistance of each of these resistors.

[RichBon]

sir please which of the resistors should carry the vin voltage. because I am not getting any voltage at PR327

[mon2]

PR173 resistor is mated with Vin. One side should be the Vin voltage. The other side mates with the next 100k ohm resistor to ground so the voltage @ pin # 9 = 50% of the Vin voltage since both the high side and low side resistors are of the same resistance.

So even if you had 10k ohm for both of these resistors, pin # 9 = 50% of the Vin. As long as both the high side and low side resistors are the same, pin # 9 will be 50% * Vin.