Title:
BATTERY POWER SUPPLY CIRCUIT
Document Type and Number:
Japanese Patent JPH02188131
Kind Code:
A
Abstract:
PURPOSE: To prevent overdischarge of a battery by detecting latch-up phenomenon through a current detecting circuit and turning a switching circuit OFF for a predetermined time.
CONSTITUTION: Upon occurrence of latch-up phenomenon in a CPU 3, current supply from a battery 5 through a power source circuit 6 increases, and an overcurrent is detected through a current detecting circuit 11. Upon reception of a detection signal A, a one-shot multivibrator 12 brings the output B to High level and turns a transistor TR2 OFF for a predetermined time. Consequently, power supply to the CPU 3 is stopped during this interval and latch-up phenomenon is eliminated.
Inventors:
MAEDA SUSUMU
Application Number:
JP678589A
Publication Date:
July 24, 1990
Filing Date:
January 13, 1989
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
H02H7/18; H02M3/155; (IPC1-7): H02H7/18; H02M3/155
Attorney, Agent or Firm:
Yoshiki Hasegawa (3 outside)