Title:
METHOD AND CIRCUIT FOR PROTECTING SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3844063
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a protection circuit from becoming inoperative when output is short-circuited.
SOLUTION: A circuit (200) controls a discharging current (I) passed through a load (400) connected between a pair of external connecting terminals (101, 102) from a secondary battery (300) by turning on and off a charge control switch (FET1), and thereby protects the secondary battery. In this circuit (200), a clamp circuit (210) clamps the control terminal (G1) of the charge control switch at a ground potential when the external connecting terminals are short- circuited to each other.
Inventors:
Kawagoe Osamu
Yukihiro Terada
Yukihiro Terada
Application Number:
JP2002025006A
Publication Date:
November 08, 2006
Filing Date:
February 01, 2002
Export Citation:
Assignee:
MITSUMI ELECTRIC CO.,LTD.
International Classes:
H02J7/00; H01M10/44; (IPC1-7): H02J7/00; H01M10/44
Domestic Patent References:
| JP2003189480A | ||||
| JP8140273A | ||||
| JP2872365B2 |
Attorney, Agent or Firm:
Kenho Ikeda