Technical Reference Notes

APC12 Centauri II

MODEL: APC12 SERIES

SHEET 12 OF 23

JANUARY 6, 2002 REVISION A (PRELIMINARY)

Power Good Signal Operation (Option (-9MA)):

PG pin provides an output signal indicating the Vout is

operational (TTL logic signal). It can sink current up to a max

of 5mA and can have a maximum external pull-up voltage of

6V. Please see recommended setup shown on Figure 6.

Active Current Share Operation (Option (-9MA)):

Active Current share pin is compatible with like modules only (APC08 to APC08 or APC12 to APC12). Connecting this pin

directly with the same Pin from another module guarantees current sharing to within 40% to 60% Iout. Note that this pin is not

compatible with competitive modules that employ active current sharing.

To attain efficient current sharing between like modules, the following points are recommended:

a) The modules to be shared should be located as close as possible into the host card.

b) The copper tracks that connect Vo and GND should at least be 0.60" in width with at least 2 oz. Cu.

Figure 6. PGood setup.