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Frequency generator and phase interleaving frequency synchronization device and method

A frequency generator and frequency synchronization technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of increased cost, complex circuit, expensive PLL, etc., and achieve the effect of low cost and simple circuit

Inactive Publication Date: 2011-07-27
RICHTEK TECH
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  • Description
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Problems solved by technology

[0005] At present, there are many interleaved phase shift frequency synchronization methods, such as US Patent No. 7,493,504 using a phase-locked loop (PLL) and external settings to obtain different phases, but the PLL is more expensive, resulting in increased cost, and the circuit is more complicated

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  • Frequency generator and phase interleaving frequency synchronization device and method
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  • Frequency generator and phase interleaving frequency synchronization device and method

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Embodiment Construction

[0028] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present invention, and other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

[0029] Figure 6 is a frequency generator according to the invention. The reference voltage generator 32 is connected to the input / output terminal IO2, and generates the reference voltage Vref to the input / output terminal IO2 when the reference voltage generator 32 is enabled by the main signal MST. The sawtooth wave generator 34 is connected to the input / output terminal IO1 and the reference voltage generator 32. When the sawtooth wave generator 34 is enabled by the main signal MST, it generates a sawtooth wave signal Vramp to the input / output terminal IO1, and according to the sawtooth wa...

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Abstract

The invention discloses a frequency generator and a phase interleaving frequency synchronization device and method so as to realize simple synchronization of translation frequency of interleaved phases in which the number of PWM (pulse-width modulation) regulators can be increased or reduced at will. The phase interleaving frequency synchronization device comprises a main frequency generator and a servant frequency generator which have different reference voltage, wherein the main frequency generator sends signals to the servant frequency generator to enable sawtooth wave signals of the two generators to be synchronized. The main frequency generator and the servant frequency generator can generate synchronized and interleaved-phase frequency according to individual reference voltage and the sawtooth wave signals.

Description

technical field [0001] The present invention relates to a phase-staggered frequency synchronization device and method applied to a multi-pulse width modulation (Pulse Width Modulation; PWM) regulator power supply, in particular to a simple phase-staggered frequency synchronization device and method. Background technique [0002] Such as figure 1 As shown, the multiple PWM regulator system includes multiple PWM regulators 10 for converting the input voltage Vin to output voltages Vol˜VoN, and the decoupling capacitor Cde is connected to the voltage input terminal Vin to reduce the ripple of the input voltage Vin. Each PWM regulator 10 respectively comprises a PWM controller 12 and a power stage 14, and the PWM controller 12 responds to the frequency in each PWM regulator 10 (based on the relationship between the clock and the reciprocal of the frequency, frequency synchronization is clock synchronization, therefore Figure 1 to Figure 3 The clock is used for schematic illust...

Claims

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Application Information

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IPC IPC(8): H02M3/07
Inventor 陈曜洲陈安东
Owner RICHTEK TECH
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