Two-stage boost power supply based on digital full-bridge BOOST
A booster circuit, power supply technology, applied in electrical components, regulating electrical variables, instruments, etc., can solve problems such as poor safety, inability to achieve isolation effect, and heavy quality
Inactive Publication Date: 2021-07-06
安徽省金屹电源科技有限公司
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Problems solved by technology
[0003] Single-stage transformer step-up, when the voltage difference is large, the transformer is large in size and heavy in weight, which does not meet the development trend of miniaturization and light weight of the step-up power supply
The BOOST single-stage boost system cannot achieve the isolation effect of input and output; in addition, the safety between the input low voltage and the output high voltage is not good, because a large voltage difference will be generated between the input and output at the same time, which makes the internal power of the circuit Higher risk of damage to the device
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[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0037] In describing the present invention, it is to be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "surrounding" etc. Indicating orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a sp...
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The invention discloses a two-stage boost power supply based on a digital full-bridge BOOST. The two-stage boost power supply is characterized in that a digital control circuit comprises an input voltage detection module, an output voltage detection module, a current detection module, an inversion pulse output module and a boost pulse output module, a MOS tube full bridge inverts the input direct current and outputs the direct current to a transformer T1, the secondary side of the transformer T1 is connected with the input end of a rectifier bridge, the output end of the rectifier bridge is connected with a BOOST secondary boost circuit, one end of an inductor L1 is connected with the output end anode of the rectifier bridge, and the other end of the inductor L1 is sequentially connected in series with a diode D1 and a capacitor C2 to the negative electrode of the output end of the rectifier bridge. According to the invention, through first-stage full-bridge isolation boosting, the bearing voltage and current of a switching tube are reduced, a switching device is protected, and the size and design difficulty of an isolation transformer are reduced; the control precision is improved by digitally controlling full-bridge isolation; and the second-stage BOOST ensures the stability of the output voltage and the digital wide-range adjustment capability, and improves the step-up ratio of the system.
Description
technical field [0001] The invention belongs to the technical field of power supplies, in particular to a two-stage boost power supply based on digital full-bridge BOOST. Background technique [0002] With the rapid development of the power supply market, the traditional model of BOOST system or unipolar DC / DC boost power supply represented by unipolar transformer is no longer enough to meet the market demand. [0003] Single-stage transformer step-up, in the case of a large voltage difference, the transformer is large in size and heavy in weight, which does not meet the development trend of miniaturization and light weight of the step-up power supply. The BOOST single-stage boost system cannot achieve the isolation effect of input and output; in addition, the safety between the input low voltage and the output high voltage is not good, because a large voltage difference will be generated between the input and output at the same time, which makes the internal power of the ci...
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IPC IPC(8): H02M3/335H02M3/157
CPCH02M3/33569H02M3/33515H02M3/33523H02M3/157
Inventor 金国卫何野陈雨薇
Owner 安徽省金屹电源科技有限公司