Datasheet LTC3827 (Analog Devices) - 9

LTC3827
PIN FUNCTIONS TRACK/SS1, TRACK/SS2 (Pins 29, 13):
External Track-
VFB1, VFB2 (Pins 31, 11):
Receives the remotely sensed ing and Soft-Start Input. The LTC3827 regulates the feedback voltage for each controller from an external VFB1,2 voltage to the smaller of 0.8V or the voltage on the resistive divider across the output. TRACK/SS1,2 pin. A internal 1μA pull-up current source
SENSE1+, SENSE2+ (Pins 32, 10):
The (+) Input to the is connected to this pin. A capacitor to ground at this Differential Current Comparators. The I pin sets the ramp time to fi nal regulated output voltage. TH pin voltage and controlled offsets between the SENSE– and SENSE+ pins in Alternatively, a resistor divider on another voltage supply conjunction with R connected to this pin allows the LTC3827 output to track SENSE set the current trip threshold. the other supply during startup.
Exposed Pad (Pin 33):
SGND. Must be soldered to the PCB.
ITH1, ITH2 (Pins 30, 12):
Error Amplifi er Outputs and Switching Regulator Compensation Points. Each associ- ated channel’s current comparator trip point increases with this control voltage. 3827ff 9