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Control circuit and method
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A control circuit, switch control circuit technology, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve the problems of large analog area, unfavorable integration, large size of power management chip tube, etc.
Inactive Publication Date: 2017-12-29
SANECHIPS TECH CO LTD
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[0003] Most of the existing charge and discharge chips are digital-analog hybrid chips, and the voltage detection function is completed by the analog comparator and digital control. However, most of them currently use multiple analog comparators to judge the voltage threshold interval. Several analog comparators are used for each voltage threshold range, and because the tube size of the power managementchip is relatively large, multiple comparators will make the analog area relatively large and the cost is high, which is not conducive to the current trend of high integration and cost saving
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Embodiment 1
[0057] Such as figure 1 As shown, the embodiment of the present invention provides a control circuit 1, and the control circuit 1 may include:
[0058] An alternative voltage interval decoding circuit 10, a comparison circuit 11 connected to the alternative voltage interval decoding circuit 10, and a judgment circuit 12 respectively connected to the alternative voltage interval decoding circuit 10 and the comparison circuit 11 ;in,
[0059] The candidate voltage range decoding circuit 10 is configured to control switching between a plurality of preset candidate voltage ranges according to the comparison result of the comparison circuit 11, and output the selected first candidate voltage range to The comparison circuit 11.
[0060] The comparison circuit 11 is configured to compare the charging and discharging voltage with the first candidate voltage range, and output the comparison result to the judgment circuit 12 and the candidate voltage range decoding circuit 10 .
[00...
Embodiment 2
[0102] The embodiment of the present invention provides a control method, such as Figure 10 As shown, the method may include:
[0103] S101. Determine a first candidate voltage range to be detected from among a plurality of preset candidate voltage ranges.
[0104] S102. Obtain a charging and discharging voltage.
[0105] S103. Determine whether the charging and discharging voltage belongs to the first candidate voltage range.
[0106] S104. If yes, end the current control process of the current voltage interval.
[0107] S105. If not, adjust the first candidate voltage interval according to a preset policy, and start the next control process.
[0108] It should be noted that in the embodiment of the present invention, the voltage threshold interval is divided by the alternative voltage interval decoding circuit, and the current voltage interval to be detected, that is, the first alternative voltage interval, and then the obtained charge and discharge voltage is combined w...
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Abstract
The embodiments of the present invention disclose a control circuit. The control circuit includes an alternative voltage interval decoding circuit, a comparison circuit connected with the alternative voltage interval decoding circuit, and a judgment circuit connected with the alternative voltage interval decoding circuit and the comparison circuit, wherein the alternative voltage interval decoding circuit is used for controlling switching between a plurality of preset alternative voltage intervals according to the comparison result of the comparison circuit and outputting a selected first alternative voltage interval to the comparison circuit, the comparison circuit is used for comparing charge-discharge voltage with the first alternative voltage interval and outputting a comparison result to the judgment circuit and the alternative voltage interval decoding circuit, and the judgment circuit is used for judging an affiliation relation between the charge-discharge voltage and the first alternative voltage interval according to the comparison result. The embodiments of the present invention also disclose a control method.
Description
technical field [0001] The invention relates to voltage detection technology in the field of electronic applications, in particular to a control circuit and method. Background technique [0002] In the charging and discharging chip, it is necessary to monitor the voltage value of the charging and discharging voltage Vout in real time, divide the highest charging voltage and the lowest voltage into several voltage threshold intervals, and monitor the charging and discharging voltage Vout in real time to determine which voltage threshold interval Vout is in. When Vout When in different voltage threshold intervals, the charging and discharging chip will perform different operations. [0003] Most of the existing charge and discharge chips are digital-analog hybrid chips, and the voltage detection function is completed by the analog comparator and digital control. However, most of them currently use multiple analog comparators to judge the voltage threshold range. Several analo...
Claims
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Application Information
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