Remote sensing potential detection type vehicle power supply device

摘要

PROBLEM TO BE SOLVED: To suppress occurrence of a hunting phenomenon of output voltage irrespective of load size and to more stably output an output voltage than before when an output power line is disconnected under remote control.;SOLUTION: A remote sensing potential detection type vehicle power supply 10 is provided with a switching power supply circuit part 20 having output terminals 32 and 33 and switching elements Q1, Q2, Q3 and Q4, and a voltage control circuit part 50 performing remote control when a remote sensing potential V_S of the local potential V_L and remote sensing potential V_S is in a normal range or performing local control when the remote sensing potential V_S is out of the normal range to make switching between remote control and local control. The power supply is also provided with an output current detecting means (current detector 40) detecting an output current I. The voltage control circuit part 50 switches remote control and local control based on the output current I.;COPYRIGHT: (C)2011,JPO&INPIT