JPS6446114A - Power supply sequence circuit - Google Patents
Power supply sequence circuitInfo
- Publication number
- JPS6446114A JPS6446114A JP20180887A JP20180887A JPS6446114A JP S6446114 A JPS6446114 A JP S6446114A JP 20180887 A JP20180887 A JP 20180887A JP 20180887 A JP20180887 A JP 20180887A JP S6446114 A JPS6446114 A JP S6446114A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- terminal
- output
- delivered
- regulator
- 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
Abstract
PURPOSE:To surely control the power supply application sequence and to improve the power supply reliability with small power consumption, by using 1st and 2nd conduction path means using the optical coupling elements, a delay means, a control means for output power supply, etc. CONSTITUTION:When a negative power supply VIN2 is applied to an input power supply terminal 32, the output of a 3-terminal regulator 50 is kept at an earth level and therefore a light emitting diode 62 emits no light. Then an optically connected phototransistor Tr64 does not conduct and therefore an output power supply VEE is not delivered to an output terminal 38. When a positive power supply VIN1 is applied to an input terminal 30, the prescribed voltage VCC is delivered from an output terminal 36 via a regulator 50. The voltage VCC is also supplied to a delay circuit 12 and a voltage detecting circuit 14. Thus the diode 62 emits the light and the Tr64 conducts. Then the voltage VIN2 supplied to the terminal 32 is converted into the prescribed voltage VEE via a 3-terminal regulator 68 and delivered via the terminal 38. Thus it is possible to surely control the power supply application sequence and to improve the power supply reliability with small power consumption.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20180887A JPS6446114A (en) | 1987-08-14 | 1987-08-14 | Power supply sequence circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20180887A JPS6446114A (en) | 1987-08-14 | 1987-08-14 | Power supply sequence circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6446114A true JPS6446114A (en) | 1989-02-20 |
Family
ID=16447260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20180887A Pending JPS6446114A (en) | 1987-08-14 | 1987-08-14 | Power supply sequence circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446114A (en) |
-
1987
- 1987-08-14 JP JP20180887A patent/JPS6446114A/en active Pending
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