公开(公告)号：US10778104B2

公开(公告)日：2020-09-15

申请号：US16131650

申请日：2018-09-14

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Heping Ding ,  Ryan Griffin

IPC: H02M3/335 ,  H01L35/02

Abstract: A DC-DC converter and method are provided for converting a low voltage DC input to a higher voltage DC output. The DC-DC converter has an oscillator with a first relatively voltage sensitive and relatively low power transistor and a second relatively voltage insensitive and relatively high power transistor, the oscillator producing an AC signal from the low voltage DC input. The inclusion of the voltage sensitive transistor allows the oscillator to turn on at a relatively low voltage. The inclusion of the higher power transistor allows the oscillator to operate at a higher power once it turns on. The DC-DC converter can be used for converting energy harvested from low voltage sources.

公开(公告)号：US10476367B2

公开(公告)日：2019-11-12

申请号：US15933970

申请日：2018-03-23

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Heping Ding ,  George Xiao ,  Ryan Griffin ,  Ye Tao

IPC: H02M1/08 ,  H02M3/156

Abstract: A voltage and current triggered switch that turns on when a voltage across the switch reaches a turn-on voltage and that turns off when a current through the switch drops below a holding current. The switch features a Zener diode having a breakdown voltage. The Zener diode is connected to set the turn-on voltage of the switch to be the breakdown voltage of the Zener diode. Also provided is a step-down DC-DC converter comprising such a switch. Also provided is a system that has a tribo-electricity source or a piezo-electricity source, the provided step-down DC-DC converter and a load connected to an output of the stepdown DC-DC converter.