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Voltage Feedforward Compensation and Voltage Feedback Compensation for Switch Mode Power Supplies

A switch-mode power supply, voltage feed-forward technology, applied in electrical components, output power conversion devices, DC power input to DC power output, etc., to achieve the effect of improved robustness and high computational cost

Inactive Publication Date: 2017-09-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This results in improved robustness against input voltage transients

Method used

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  • Voltage Feedforward Compensation and Voltage Feedback Compensation for Switch Mode Power Supplies
  • Voltage Feedforward Compensation and Voltage Feedback Compensation for Switch Mode Power Supplies
  • Voltage Feedforward Compensation and Voltage Feedback Compensation for Switch Mode Power Supplies

Examples

Experimental program
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Embodiment Construction

[0045] image 3 An SMPS controlled by a digital control unit 300 according to a first embodiment of the invention is shown.

[0046] refer to image 3 , the digital control unit 300 is configured to receive an input voltage V indicating the SMPS 100 in and the output voltage V out signal of. The input signal may comprise an analog signal of the voltage itself or a digital signal containing information defining the value of the voltage measured by a measuring device (not shown). However, in this embodiment, an analog signal is employed and transmitted to the ADCs 202 and 203 . ADCs 202, 203, logic units 204, 205, and DPWM 208 perform the same figure 2 The operation described is the same operation, so it will not be described again here.

[0047] The digital control unit 300 includes a feedback compensator 3014 , a feedforward compensator 3013 , a transient detector 3012 and a controller 3011 .

[0048] Feedback compensator 3014 and feedforward compensator 3013 may be co...

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Abstract

The digital control unit 300 generates a control signal D to control the duty cycle of the switch mode power supply 100 in order to achieve a faster response to input voltage transients. The digital control unit includes a feedback compensator 3014 , a feedforward compensator 3013 , a transient detector 3012 and a controller 3011 . The transient detector receives a signal indicative of an input voltage of the switched mode power supply and detects transients in the received signal. The feedback compensator receives a signal indicative of the output voltage of the switch mode power supply and adjusts the control signal D. The feedforward compensator receives a signal indicative of the input voltage of the switched mode power supply, performs a relatively fast but coarse adjustment of the control signal, and then performs a more precise but relatively slow adjustment of the control signal.

Description

technical field [0001] The present invention relates generally to the field of switched mode power supplies (also sometimes referred to as switch mode power supplies or switching mode power supplies), and more particularly to a system for use in A digital control unit for a switch mode power supply that provides improved response to input voltage transients. Background technique [0002] A switched-mode power supply (SMPS) is a well-known type of power converter that has a variety of applications due to its small size and weight and high efficiency. For example, SMPSs are widely used in personal computers and portable electronic devices such as cell phones. SMPSs achieve these advantages by switching switching elements such as power MOSFETs at high frequencies (typically tens to hundreds of kHz), where the frequency or duty cycle of the switching is adjusted using a feedback signal to convert the input voltage to the desired The output voltage. [0003] SMPSs can take the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H02M1/14H02M1/00
CPCH02M1/14H02M1/0022H02M3/33573H02M1/08H02M1/0012H02M1/0016H02M3/33546
Inventor 马格纳斯·卡尔松安德斯·卡尔曼乔纳斯·马尔伯格弗雷德里克·威尔多
Owner TELEFON AB LM ERICSSON (PUBL)
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