March 2006 REVISION 09

SH 13 of 31

Technical Reference Note

AIF - PFC Power Factor

Correction Series

Current Sharing (C SHARE)

To ensure that all modules in a parallel system accurately share current, the C SHARE pins on each module should be

connected together.

+O/P

-O/P

9

8

1

16

+O/P

-O/P

9

8

1

16

To C SHARE of

next module

From C SHARE of

previous module

To S GND of

next module

From S GND of

previous module

The voltage on the C SHARE pins represents the average load current per module. Each module compares this average with

its own current and adjusts its output voltage to correct the error. In this way the module maintains accurate current sharing

even under variable or light load conditions.

Note: 1) The S GND pins of each module must also be connected together to ensure accurate current sharing.

2) Current flow to S GND must less than 25mA