KR930022667A

KR930022667A - Battery charge level detection circuit using A / D converter

Info

Publication number: KR930022667A
Application number: KR1019920006780A
Authority: KR
Inventors: 현상훈
Original assignee: 강진구; 삼성전자 주식회사
Filing date: 1992-04-20
Publication date: 1993-11-24

Abstract

마이콤 내의 A/D변환부를 이용하여 방전되는 밧데리의 충전 레벨 상태를 검출할 수 있도록 한 것으로 종래에는 다수의 비교기 및 다수의 마이콤 입력단을 필요로 했었다.It is possible to detect the charge level of the discharged battery using the A / D conversion unit in the microcomputer conventionally required a number of comparators and a plurality of microcomputer input stage.

따라서 방전되는 밧데리의 충전 레벨을 분압 강하시켜 A/D변환부(20)에 인가시키는 검출부(10)와, 상기 검출부(10)의 출력과 기준 전압을 비교시켜 밧데리의 충전 레벨 상태를 검출한후 이를 화면에 표시할 수 있도록 제어되는 A/D변환부(20)을 구성시킴으로써 경제적인 이점과 오차에 의한 에러를 줄일수 있는 효과가 있다.Therefore, the charge level of the discharged battery is lowered by the partial pressure and applied to the A / D conversion unit 20. The detection unit 10 compares the output of the detection unit 10 with a reference voltage, and then detects the state of charge level of the battery. By constructing the A / D conversion unit 20 controlled to display this on the screen, there is an economical advantage and the effect of reducing errors due to errors.

Description

Battery charge level detection circuit using A / D converter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 비교기(CP1-CP3)를 이용한 종래 발명의 회로도.1 is a circuit diagram of a conventional invention using a comparator (CP1-CP3).

제2도는 밧데리의 충전 상태에 따른 비교기(CP1-CP3)의 출력상태를 나타낸 테이블.2 is a table showing the output state of the comparators (CP1-CP3) according to the state of charge of the battery.

제3도는 본 발명 검출부(10)의 상세 회로도.3 is a detailed circuit diagram of the detector 10 of the present invention.

제4도는 레지스터의 구조 상태도.4 is a structural state diagram of a register.

제5도는 본 발명 마이콤 내의 A/D변환부(20) 내부 구조 상태도.5 is a state diagram of the internal structure of the A / D conversion unit 20 in the present invention microcomputer.

제6도는 본 발명의 플루우 챠트.6 is a flow chart of the present invention.

Claims

In the battery charge level detection circuit, a detection unit for dividing the charge level of the discharged battery through the Zener diode (ZD1), the diode (D1), and the resistor (R6) (R7) and applying it to the A / D converter (20). And a comparator (CP4) for comparing the output of the detector (10) with the reference voltage of the reference voltage generator (27), and outputs a control signal in accordance with the output of the comparator (CP4). A control logic 25 for selecting a reference voltage level of the generator 27, and a reference voltage generator 27 for applying the reference voltage selected by the control of the control logic 25 to the comparator CP4. Battery charge level detection circuit using the A / D conversion unit consisting of one A / D conversion unit (20).

The control logic device 25 of claim 1, wherein the control logic 25 selects any one of three digital level voltages of the reference voltage generator 27 and sequentially applies the voltages to the comparator CP4 and applies the comparator CP4. A battery charge level detection circuit using an A / D converter for recognizing the output of the power supply and the selected reference voltage level of the reference voltage generator (27) to indicate the state of charge levels of different batteries.

※ Note: The disclosure is based on the initial application.