A method and system for adjusting chip output parameters without changing chip pins
A technology for outputting parameters and chips, applied in control/adjustment systems, adjusting electrical variables, instruments, etc., can solve the problem of adding additional control pins, etc., to achieve the effect of expanding the scope of use, flexible setting and adjustment, and broadening the scope of application
Active Publication Date: 2017-02-15
CRM ICBG (WUXI) CO LTD
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Problems solved by technology
[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method and system for adjusting chip output parameters without changing the chip pins, which is used to solve the problem of adding additional control pins in the prior art to change the chip output parameters. question
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[0054] This embodiment provides a method for adjusting chip output parameters without changing chip pins, such as figure 2 As shown, the method for adjusting chip output parameters without changing chip pins includes:
[0055] S201: Before the power pin of the chip is powered on, that is, when the chip is not started, use a constant current source connected to the input pin of the chip to charge the decoupling capacitor of the power pin. The decoupling capacitor is usually arranged outside the chip, and one end is connected to the power pin of the chip, and the other end is connected to the ground pin of the chip. The decoupling capacitor is usually used to provide power to the chip and filter out interference. In practical applications, there is a time requirement for chip startup and power down. This requirement determines the minimum value of the decoupling capacitor. In general applications, the decoupling capacitor uses a fixed recommended value. However, the present inven...
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The invention provides a method and a system for adjusting chip output parameters without changing chip pins. The method comprises the steps of: before a power source pin of a chip is electrified, namely, when the chip is not started, charging a decoupling capacitor of the power source pin by using a constant current source connected with an input pin of the chip; when the charging reaches a first preset voltage, detecting the charging characteristics of the decoupling capacitor; setting the corresponding output parameters by using the parameter variation quantity in the charging characteristics, wherein parameters in the charging characteristics of the decoupling capacitor include the capacitance of the decoupling capacitor, the charging current, the charging time and the charging voltage; continuing to charge the decoupling capacitor with the constant current source. The parameter variation quantity is obtained by changing the capacity of the decoupling capacitor of the power source pin of the chip, so that the output parameters of the chip can be flexibly set and adjusted by using the parameter variation quantity, the application range of the chip is widened, the restrictions of the type and number of chip pins are removed and the chip functions are increased.
Description
Technical field [0001] The invention belongs to the technical field of electronic circuits, and relates to a method for adjusting chip output parameters, in particular to a method and system for adjusting chip output parameters without changing chip pins. Background technique [0002] Generally, the pins and functions of the chip are fixedly set, and they are only applicable to specific scene ranges, such as specific output voltage range, specific output current range, specific overvoltage protection range, etc. That is, the application range of the chip is limited. [0003] Take a simple three-terminal constant current device as an example. It has only 3 pins, input pin, power pin and ground pin. There are no additional pins and components that can control the change of output current and other parameters, so its actual application range is compared. limited. Such as figure 1 As shown, the three-terminal constant current device includes input pin (Drain), power pin (VCC), ground...
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IPC IPC(8): G05F1/46G05F1/571
Inventor 吴泉清刘军闾建晶田荣华李建民
Owner CRM ICBG (WUXI) CO LTD