JPS6459514A - Method for monitoring battery voltage - Google Patents
Method for monitoring battery voltageInfo
- Publication number
- JPS6459514A JPS6459514A JP62217673A JP21767387A JPS6459514A JP S6459514 A JPS6459514 A JP S6459514A JP 62217673 A JP62217673 A JP 62217673A JP 21767387 A JP21767387 A JP 21767387A JP S6459514 A JPS6459514 A JP S6459514A
- Authority
- JP
- Japan
- Prior art keywords
- battery voltage
- power
- voltage monitoring
- monitoring circuit
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Power Sources (AREA)
Abstract
PURPOSE:To reduce power consumption in a battery voltage monitoring circuit, by monitoring a battery voltage in a power-off state periodically. CONSTITUTION:It is always required to operate the battery voltage monitoring circuit 2 since a large amount of power is consumed by each device in a power-on state and the fluctuation of the battery voltage 1 is remarkably. However, in the power-off state, the power consumption of each operating device in quite few, and the fluctuation of the voltage is gentle due to the characteristic of a battery. Then, the battery voltage monitoring circuit is operated periodically, not always operated in the power-off state. The battery voltage monitoring circuit is connected to the battery via a Tr1, and the ON/OFF operation of the Tr1 is performed by a /RON signal, and a power source control circuit 20 decides whether or not the battery voltage drops less than a preset value by energizing a voltage monitoring IC by turning ON the Tr1, and reading a /BATLO signal at a time when the operation of the voltage monitoring IC is stabilized after a prescribed time. In such a way, it is possible to reduce the power consumption in the battery voltage monitoring circuit remarkably.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217673A JPS6459514A (en) | 1987-08-31 | 1987-08-31 | Method for monitoring battery voltage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217673A JPS6459514A (en) | 1987-08-31 | 1987-08-31 | Method for monitoring battery voltage |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459514A true JPS6459514A (en) | 1989-03-07 |
Family
ID=16707929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62217673A Pending JPS6459514A (en) | 1987-08-31 | 1987-08-31 | Method for monitoring battery voltage |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459514A (en) |
-
1987
- 1987-08-31 JP JP62217673A patent/JPS6459514A/en active Pending
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