Linear voltage regulator, soft start method and electronic equipment
A linear voltage regulator and start-up module technology, which is applied in the direction of instruments, electric variable adjustment, control/regulation systems, etc., can solve the problems of external load performance loss, damage, etc., and achieve the effect of smooth establishment, prevention of imbalance, and simple structure
Active Publication Date: 2021-09-07
SHANGHAI AWINIC TECH CO LTD
View PDF9 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In the prior art, when starting a linear regulator to drive an external load, there is a high probability that the linear regulator will produce a normal operation beyond said external load The instantaneous overvoltage impact of the voltage will cause performance loss or even damage to the external load
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] Research has found that the error amplifier in the linear voltage regulator in the prior art usually uses NMOS transistors as the input pair transistors. In the initial startup phase of the linear voltage regulator, since the output voltage of the linear voltage regulator is gradually increased, the sampling voltage of the output voltage is also gradually increased, so the lower sampling voltage in the initial startup phase The voltage cannot drive the input pair tube, which will cause the error amplifier of the linear regulator to be in the offline state during the initial start-up stage, and the output of the linear regulator cannot be adjusted, causing the linear regulator offset, the soft start of the linear regulator cannot be achieved.
[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a linear voltage regulator, a soft start method of the linear voltage regulator and electronic equipment. The linear voltage regulator comprises a soft start module which is used for carrying out boosting processing on a signal input by an input end and comprises at least two input ends, wherein the first input end is used for obtaining a standard voltage, the second input end is used for obtaining a sampling voltage, the standard voltage gradually rises to the reference voltage from the initial value; an error amplification module which comprises at least two input ends, wherein the first input end is used for being connected to the output end of the soft start module so as to obtain a corresponding first boost after the standard voltage is boosted, and the second input end is also connected to the output end of the soft start module so as to obtain a corresponding second boost after the sampling voltage is boosted, amplifying the difference value of the first boost and the second boost, and outputting an error amplification value; wherein the error amplification value is used for adjusting the output voltage of the linear voltage regulator, and the sampling voltage is sampled from the output voltage.
Description
technical field [0001] The present application relates to the field of linear voltage regulators, in particular to a linear voltage regulator, a soft start method and electronic equipment. Background technique [0002] A linear regulator is a commonly used device on a circuit, which can be used to adjust the input voltage to achieve the purpose of voltage regulation. Linear regulators use transistors or FETs operating in their linear region to subtract excess voltage from the applied input voltage to produce a regulated output voltage. Its products provide excellent performance in small packages, and provide value-added features such as thermal overload protection, safety current limit, and shutdown mode can greatly reduce power consumption. [0003] The linear voltage regulator in the prior art includes a low dropout linear voltage regulator. The low dropout linear voltage regulator can make the power tube in a saturated conduction state by using the voltage difference to ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 李念龙刘珍超余东升
Owner SHANGHAI AWINIC TECH CO LTD