Page 14 of the LTC3723-1 datasheet says that a current sense transformer can be used with the LTC3723-1 PWM controller...however, the voltage reference on the current sense input is only 300mV....surely this is too low for the output of a current sense transformer, and really we would like at least 1 volt here?
LTC3723-1 datasheet
http://cds.linear.com/docs/en/datasheet/372312f.pdf
LTC3723-1 datasheet
http://cds.linear.com/docs/en/datasheet/372312f.pdf