Datasheet

SLUU166A - December 2003 − Revised February 2004
15
UCC39002 Advanced Load-Share Controller User’s Guide, HPA027A
Table 1. Connection Chart for Various Operating Conditions
OPERATING CONDITIONS JUMPER POSITION COMMENTS
Power module output voltage
JP1
External minimum bias voltage of 4.575V for the Loads Share Controller re-
Power module output voltage
greater than 1V but less than 5V
JP2
EXT.
External minimum bias voltage of 4.575V for the Loads Share Controller re-
quired at the EXTERNAL BIAS terminal block
greater than 1V but less than 5V
JP3
EXT.
quired at the EXTERNAL BIAS terminal block
Power module output voltage be-
JP1
Power module output voltage be-
tween 5V and 15V
JP2
INT. Load Share Controller bias from the output bus voltage of each of the modules
tween 5V and 15V
JP3
INT.
Load Share Controller bias from the output bus voltage of each of the modules
Remote sensing
JP4
OPEN
Connect leads from the REMOTE SENSE terminal block directly to the load for
Remote sensing
JP5
OPEN
Connect leads from the REMOTE SENSE terminal block directly to the load for
voltage sensing at the point of load
Local sensing
JP4
SHORTED
Voltage sensing at the J7/J8 connectors for local sensing on the EVM board
Local sensing
JP5
SHORTED Voltage sensing at the J7/J8 connectors for local sensing on the EVM board
10 Conclusion
This user’s guide will help the user determine the appropriate components to populate the available evaluation
board in order to current share power modules using the UCC39002 advanced load-share controller. load-share
accuracies of better than 1% at full load will be realized. At light load, internal offset voltages and small signal
measurement error have a more pronounced effect, which will contribute to a larger current distribution error.
11 References
Balogh, Laszlo, The UC3902 load-Share Controller and It’s Performance in Distributed Power, TI Literature No.
SLUA128A
Dinwoodie, Lisa, 48-V
IN
, 12-V
OUT
Loadshare System Using the UCC39002 With Three DC/DC Modules, TI
Literature No. SLUA270A
Advanced 8-Pin Load-Share Controller, TI Literature No. SLUS495B