Boost-buck charge pump, voltage management chip, device and method
A step-up, step-down, and voltage-boost technology, applied in the field of voltage management chips, step-up and step-down charge pumps, and can solve problems such as reducing battery usage time and standby time, low efficiency, and large loss of linear regulators. , to achieve the effect of increasing usage and standby time, improving system efficiency and reducing system power consumption
Pending Publication Date: 2019-01-01
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD
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Problems solved by technology
The existing voltage management chip uses a linear voltage regulator to realize the step-down output from DC to DC, which has two disadvantages: one is that when the battery (pack) is fully charged, the difference between the input voltage and the output voltage is relatively large , the loss of the linear regulator is large, the efficiency is very low, which reduces the use time and standby time of the battery (group); second, when the battery (group) is low, the input voltage is lower than the output voltage, and the linear regulator cannot provide enough output
Method used
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[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. Furthermore, the present disclosure repeats reference numerals and / or reference letters in different examples, such repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0019] The step-up and step-down charge pump of the present invention switches to the step-up mode by receiving the step-up mode control signal or switches to the step-down mode by receiving the step-down mode control signal; in the step-up mode, the step-up and st...
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The invention discloses a boost-buck charge pump, a voltage management chip, device and method. By only one charging and discharging circuit and five groups of switches, boost and buck functions can be realized by the boost-buck charge pump, thereby simplifying the structure of the charge pump, greatly saving the cost, reducing the system power consumption, improving the system efficiency, increasing the use and standby time of a battery (pack), and overcoming the technical problems of low efficiency in the case of high power voltage and inability to work in the case of low power voltage whena linear voltage regulator is adopted in existing power management application.
Description
technical field [0001] The invention relates to the technical field of analog integrated circuits, in particular to a step-up and step-down charge pump, a voltage management chip, a device and a method. Background technique [0002] At present, many applications in the motor drive industry use batteries (groups) for power supply. When the battery (group) has sufficient power, the output voltage is high. 50%. The existing voltage management chip uses a linear voltage regulator to realize the step-down output from DC to DC, which has two disadvantages: one is that when the battery (pack) is fully charged, the difference between the input voltage and the output voltage is relatively large , the loss of the linear regulator is large, the efficiency is very low, which reduces the use time and standby time of the battery (group); second, when the battery (group) is low, the input voltage is lower than the output voltage, and the linear regulator cannot provide sufficient output....
Claims
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IPC IPC(8): H02M3/07
CPCH02M3/07H02M3/072Y02B70/10
Inventor 郁炜嘉黄河易坤
Owner SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTD