Single-inductance double-output power converter and driving method thereof

A single-inductor dual-output, power converter technology, applied to output power conversion devices, DC power input conversion to DC power output, instruments, etc., can solve problems such as not so ideal

Active Publication Date: 2015-05-20
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this proposed architecture is only suitable for use in certain specific load conditions, and the output voltage controlled by the comparator, compared with the error amplifier in the closed loop, the overall voltage regulation (Load Regulation, Line Regulation ) are not so ideal

Method used

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  • Single-inductance double-output power converter and driving method thereof
  • Single-inductance double-output power converter and driving method thereof
  • Single-inductance double-output power converter and driving method thereof

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Embodiment Construction

[0035] figure 1 The architecture shown in FIG. 1 shows an embodiment of the single-inductor dual-output power converter 10 of the present invention. The single inductor dual output power converter 10 includes: a power stage circuit 113 including an inductor 101 , a first output terminal OA and a second output terminal OB. Wherein, the inductor 101 is used to realize a DC / DC converter with two output voltages; a first error amplifier 102 is coupled to the first output terminal OA to output a first error signal V EA ; A second error amplifier OB, coupled to the second output terminal OB, for outputting a second error signal V EB; A current detection circuit (CurrentSensing Circuit) 105, in order to detect the current of one end on the inductor 101 and output a first signal V S ; A slope compensation (Slope Compensation) device 106 for outputting a second signal V Slope , where adder 115 is the first signal V S and the second signal V Slope summed to generate the reference s...

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Abstract

The invention discloses a single-inductance double-output power converter and a driving method thereof. The single-inductance double-output power converter comprises a power level circuit, a current detection circuit, a slope compensation device, at least two error amplifiers, a comparison unit, a mode switching circuit, a logic device and a driver. Under the control of a full-current mode, the single-inductance double-output power converter has the optimal power conversion efficiency and is high in output steady state and transient response; furthermore, different energy transmission modes are disclosed and used in different load conditions, so that the problem about mutual voltage stabilization is solved; moreover, output voltage ripple and transient response are improved; and therefore, the single-inductance double-output power converter has an elastic using environment and high output performance.

Description

technical field [0001] The invention relates to a single-inductance dual-output power converter and a driving method thereof, in particular to a single-inductance dual-output power converter with low mutual voltage stabilization effect and low energy loss and a driving method thereof. Background technique [0002] At present, power management IC (Power Management IC) has been widely used in portable electronic products. From mobile phones, PDAs, and even notebook computers, power management is a big and important topic. How to maximize the battery life and use the best efficiency to achieve the best performance of the product and increase relative competitiveness is what the industry is concerned about. Using a single-inductor dual-output voltage architecture is different from previous DC / DC converters, and can reduce the use of external components (inductors), which is used to save costs and improve product competitiveness. By reducing the use of inductors, the most direct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
Inventor 陈科宏李昱辉王士荣杨耀沂林盈熙
Owner REALTEK SEMICON CORP
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