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Multiple output power converter and control method thereof

A power converter, multi-output technology, applied in output power conversion devices, conversion equipment without intermediate conversion to AC, electrical components, etc., can solve problems such as large inrush currents

Active Publication Date: 2019-01-11
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a multi-channel output power converter to solve the problem of large surge current when the charge pump is started in the prior art

Method used

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  • Multiple output power converter and control method thereof
  • Multiple output power converter and control method thereof
  • Multiple output power converter and control method thereof

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Embodiment Construction

[0035] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0036] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0037] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses a multi-output power converter and a control method thereof. Before the charge pump is started, a series of short pulses are generated to precharge the pumping capacitor in thecharge pump through the DC-DC converter before the DC-DC converter and the charge pump start to operate, the output voltages of the DC-DC converter and the charge pump are still close to ground and do not start normal operation. When the DC-DC converter and charge pump start normally, the surge current is greatly reduced because the pump capacitor has been fully or partially charged, and the surge current of the system will be reduced to a safe level during the normal start-up period.

Description

technical field [0001] The invention relates to a power electronic technology, more specifically, to a multi-output power converter applied in a power supply and a control method thereof. Background technique [0002] In PMIC (Power Management IC, integrated power management circuit) products, multiple outputs are usually required, and it is a relatively simple implementation strategy to add a charge pump to a switching power supply to increase one output. [0003] Among them, a more convenient and low-cost way to realize the charge pump is to use the switch output terminal from other switch mode DC-DC converters to drive the charge pump, such as a boost circuit or a buck circuit. However, since the switch-mode DC-DC converter is designed to drive an inductor, large inrush currents can occur in the charge pump when its switch output is connected to a capacitor in the charge pump. Large current spikes often lead to equipment failure if there is no proper way to control the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M1/32
CPCH02M1/32H02M3/07
Inventor 段晓明张鲁
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD