Reference Designs

PMP8877 is a full-function 1/8th brick isolated DC/DC telecom power module based on the UCD3138 digital power controller. The reference design features secondary side control and hard switching full bridge power topology to deliver 12V/180W of output power operating across a wide range 36V-72V input source. The highlights of the reference design include 94% peak efficiency: fast input voltage feedforward response to input voltage surges: constant current/constant power overload protection: pre-bias start-up: current sharing control for paralleled module applications and PMBUS support for communication with peer controllers. The bias supply block employs the UCC25230: while the gate drivers used in this design include UCC27524 for driving the SR MOSFETs and UCC27211 for driving the primary side Half-Bridge MOSFETs. Other components include the ISO7240 for sending signals across the isolation barrier.