Description

PMP21112 is a dual-phase boost reference design utilizing the LM25112-Q1 controller for automotive applications. This design can operate from 9V to 16V. The design has an adjustable output of 16V to 40V and capable of sourcing 10A continuous current. LM25112-Q1 has a bypass function where Vin is equal or greater than the set output voltage: the device will bypass Vin via the high side sync FET. Output adjustment is achieved via a 3.3V PWM signal: by adjusting the duty cycle of the PWM signal from 10% to 90%: output will go from 40V to 16V respectively. This design is also capable of tracking a sine wave up to 500Hz without distortion and achieve less than 300us delay time between sine wave and the output voltage. Switching frequency is set to 150kHz: and a 4 layer PCB is used. Three 6.8mF: 65V rated electrolytic capacitors are used to damp the input supply’s wiring inductance for all test data taken on this test report.