Multiphase voltage reduction converter with phase compensation and phase compensation method thereof
A converter and digital compensation technology, applied in the field of multi-phase buck converters, which can solve the problems of reduced bandwidth, insufficient phase margin, and inconvenience of multi-phase buck converters
Inactive Publication Date: 2014-07-09
RICHTEK TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
refer to Figure 3 to Figure 6 , when the design of the digital compensation circuit 14 is based on the single-phase control pair output voltage transfer function, there will not be enough phase margin in four-phase operation, on the other hand, when the design of the digital compensation circuit 14 is based on the four-phase control pair When the output voltage transfer function is used, the bandwidth of single-phase and two-phase operation will become smaller, which will lead to the deterioration of transient response during single-phase and two-phase operation
[0005] Therefore, there are above-mentioned inconveniences and problems in the known multi-phase step-down converter.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0047] The present invention will be further described below in conjunction with embodiment and accompanying drawing.
[0048] see now Figure 7 , Figure 7 so figure 1 An embodiment of the digital four-phase buck converter based design. As shown in the figure, the digital compensation circuit 60 connected between the digital pulse width modulation circuit 12 and the analog-to-digital converter 16 can know the number of phase circuits 10 currently in operation according to the phase number signal phx_num, and according to The number of operating phases changes its compensation coefficient, thus providing an error signal e'[n] suitable for the current number of operating phases.
[0049] Figure 8 for Figure 7 In the first embodiment of the digital compensation circuit 60, the delay circuit 62 delays the error signal e[n] to generate the signal e[n-1], and the delay circuit 64 delays the signal e[n-1] to generate the signal e[n-2 ], the delay circuit 66 delays the signal...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a multiphase voltage reduction converter with phase compensation. The multiphase voltage reduction converter is characterized in that: an error amplifier is connected with the output end of the multiphase voltage reduction converter to detect the output voltage of the multiphase voltage reduction converter so as to generate a simulation error signal; an analog-digital converter is connected with the error amplifier to convert the simulation error signal into a digital error signal; a digital compensation circuit is connected with the analog-digital converter to compensate the digital error signal; a digital pulse width modulation circuit is connected with the digital compensation circuit to provide a plurality of pulse width modulation signals according to the compensated digital error signal; and a plurality of phase circuits are connected in parallel between the digital pulse width modulation circuit and the output end of the multiphase voltage reduction converter, and each phase circuit converts input voltage into the output voltage according to the respective pulse width modulation signal, wherein the digital compensation circuit changes a compensation coefficient of the digital compensation circuit on the digital error signal along with the number of the phase circuits in the operation process.
Description
technical field [0001] The present invention relates to a multi-phase step-down converter, in particular, a multi-phase step-down converter with a phase shedding mechanism. Background technique [0002] figure 1 It is a known digital four-phase step-down converter with a phase masking mechanism, which includes four phase circuits 10 for converting an input voltage Vi into an output voltage Vo, an error amplifier 18 for detecting the output voltage Vo to generate an error signal EA, The analog-to-digital converter 16 is used to convert the analog error signal EA into a digital error signal e[n], and the digital compensation circuit 14 is used to compensate the error signal e[n] to generate an error signal e'[n], and a digital pulse width The modulation circuit 12 generates pulse width modulation signals PWM1 , PWM2 , PWM3 and PWM4 to drive the four phase circuits 10 according to the error signal e′[n]. The digital pulse width modulation circuit 12 can determine the number o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/145
Inventor 张炜旭林育政伍玉光陈德玉
Owner RICHTEK TECH