cupoftea
Advanced Member level 6
Hi,
We are evaluating a 750W offline (100-265VAC) 24Vout converter for purchase. They tell us that it can do load sharing with other paralleled converters the same. They point to a UC3902 load share controller in the schematic. However, I have looked closer and see that the way they have connected the UC3902.....the UC3902 does not adjust the Vout of the converter. The converter’s Vout is adjusted by a microcontroller. This microcontroller also reads the converter’s output current. And the converters output voltage.
The micro does not read the “Share Bus” of the UC3902. Also, the micro takes in no signals from the UC3902. The micro takes in no signals from any other paralleled PSU.
Do you agree that this converter cannot be truly load sharing (with other paralleled converters the same as it) over the entire load range?
UC3902
We are evaluating a 750W offline (100-265VAC) 24Vout converter for purchase. They tell us that it can do load sharing with other paralleled converters the same. They point to a UC3902 load share controller in the schematic. However, I have looked closer and see that the way they have connected the UC3902.....the UC3902 does not adjust the Vout of the converter. The converter’s Vout is adjusted by a microcontroller. This microcontroller also reads the converter’s output current. And the converters output voltage.
The micro does not read the “Share Bus” of the UC3902. Also, the micro takes in no signals from the UC3902. The micro takes in no signals from any other paralleled PSU.
Do you agree that this converter cannot be truly load sharing (with other paralleled converters the same as it) over the entire load range?
UC3902