Claims
- 1. A charge/discharge control circuit comprising:an electric power source; current detection means connected in series with the electric power source for producing an output voltage in accordance with a level of a current flowing through the electric power source; first voltage detection means for detecting the output voltage of the current detection means; and second voltage detection means for detecting an output voltage of the first voltage detection means; wherein the second voltage detection means has a latch function and outputs a signal for stopping an overcurrent to the electric power source.
- 2. A chargeable electric power source apparatus having an overcurrent detection means, switch means and a secondary cell connected in series with an external electric power source terminal, and a charge/discharge control circuit connected in parallel with the secondary cell for controlling the switch means, the charge/discharge control circuit comprising:current detection means connected in series with the electric power source for producing an output voltage in accordance with a level of a current flowing through the electric power source; first voltage detection means for detecting the output voltage of the current detection means; and second voltage detection means for detecting an output voltage of the first voltage detection means; wherein the second voltage detection means has a latch function and outputs a signal for controlling the switch means.
Priority Claims (18)
Number |
Date |
Country |
Kind |
4-313515 |
Nov 1992 |
JP |
|
5-3561 |
Jan 1993 |
JP |
|
5-51110 |
Mar 1993 |
JP |
|
5-52476 |
Mar 1993 |
JP |
|
5-56208 |
Mar 1993 |
JP |
|
5-57563 |
Mar 1993 |
JP |
|
5-57564 |
Mar 1993 |
JP |
|
5-62259 |
Mar 1993 |
JP |
|
5-62260 |
Mar 1993 |
JP |
|
5-65758 |
Mar 1993 |
JP |
|
5-67132 |
Mar 1993 |
JP |
|
5-94677 |
Apr 1993 |
JP |
|
5-120198 |
May 1993 |
JP |
|
5-126238 |
May 1993 |
JP |
|
5-220279 |
Sep 1993 |
JP |
|
5-223647 |
Sep 1993 |
JP |
|
5-224186 |
Sep 1993 |
JP |
|
5-261285 |
Oct 1993 |
JP |
|
Parent Case Info
The present application is a divisional and is based on prior U.S. application Ser. No. 08/816,196, filed on Mar. 12, 1997, now U.S. Pat. No. 5,841,265, which is hereby incorporated by reference, and priority thereto for common subject matter is hereby claimed.
US Referenced Citations (4)