Mixed digital pulse duration modulater suitable for digital power supply controller

A technology of pulse width modulator and digital power supply, applied in the direction of differential modulation, can solve the problems of low stability, low resolution and large area, and achieve the effect of ensuring stability, high resolution and high speed

Inactive Publication Date: 2007-12-19
HEBEI ZHAORI OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to propose a new type of hybrid digital pulse width modulator suitable for digital power supply controllers, so as to overcome ...

Method used

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  • Mixed digital pulse duration modulater suitable for digital power supply controller
  • Mixed digital pulse duration modulater suitable for digital power supply controller
  • Mixed digital pulse duration modulater suitable for digital power supply controller

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Embodiment Construction

[0022] Further describe the present invention below in conjunction with accompanying drawing.

[0023] Figure 3 shows the system structure block diagram of the entire hybrid digital pulse width modulator. The adaptive bias voltage generation circuit 12 generates a bias voltage V with temperature process compensation ctrl 47 (output terminal), connected to the control voltage input terminal 15 of the 8-stage voltage-controlled loop oscillator 13, generating a 16-phase clock 29-31 (output terminal) that is not affected by process deviation and external temperature, and connected to the digital control part Input terminals 60-62; the digital control part 14 generates a modulation with a resolution of n bits at the modulation pulse output port 68 according to the 16-phase clock from the 8-stage voltage-controlled loop oscillator 13 and the n-bit duty cycle 59 of the input terminal pulse. The input terminal of the entire hybrid digital pulse width modulator is an n-bit duty cycle...

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Abstract

This invention relates to a mixed digital pulse modulator used in digital supply controllers composed of an adaptive offset voltage generation circuit, a 8-stage voltage-controlled loop oscillator and a digital control part, in which, the adaptive offset voltage generation circuit generates an offset voltage compensated by temperature technology to control the loop oscillator and a 16-phase clock C0-C15 not influenced by outside temperature or technical offset, and the digital control part generates a modulated pulse with the resolution of n-bit according to the clock staggered for 1/16 period orderly and n-bit duty ratio input from outside d[n-1 :0].

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a novel hybrid digital pulse width modulator suitable for digital power controllers. Background technique [0002] With the rapid development of electronic information technology, people's life has become more and more inseparable from various consumer electronic products, and a power supply with excellent performance is a necessary prerequisite for these electronic products to perform their functions. Switching power supply technology has been widely used due to its advantages of high conversion efficiency and wide range of voltage regulation. At the same time, the switching power supply also has the advantages of small size and light weight, and is more suitable for portable electronic products such as mobile phones, digital cameras, and notebook computers. Using switching power supply for key modules can not only prolong the battery life of the device,...

Claims

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Application Information

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IPC IPC(8): H03M3/04
Inventor 李舜陈华周锋
Owner HEBEI ZHAORI OPTOELECTRONICS TECH
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