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Analog-to-digital converter for digital control switch DC-DC converter

An analog-to-digital converter, DC-DC technology, applied in the direction of analog-to-digital converters, etc., can solve problems such as large power consumption and area, large delay, and inapplicability

Inactive Publication Date: 2010-12-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The power consumption and area of ​​the voltage-controlled oscillator ADC are small, but the digital code must be counted to obtain the digital code, and the delay is large. At the same time, the power consumption and area are large, and it is not suitable for high-frequency digital control switching DC-DC converters.

Method used

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  • Analog-to-digital converter for digital control switch DC-DC converter
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  • Analog-to-digital converter for digital control switch DC-DC converter

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] see figure 1 , the device of the present invention is connected with the output end of the switching DC-DC converter, and the present invention includes a delay line ADC and a Flash ADC. Detect the output voltage of the switching DC-DC converter, and convert the magnitude of the voltage into a corresponding digital code.

[0023] figure 1 In the delay line ADC, the port vdd is connected to the power supply vdd, the vsense is connected to the voltage signal to be detected, the test port is connected to the excitation signal, the gnd port is grounded, the sample port is connected to the sampling signal, and the output ports Q0 to Q14 are encoded with 16-4 The encoder input ports vin0 to vin14 are connected, the encoder decodes the digital code output by the delay line Q0-Q14 into 8421 code output, and the encoder out0-out3 is the output port out0-out...

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Abstract

The invention discloses an analog-to-digital converter for a digital control switch DC-DC converter. The analog-to-digital converter comprises a delay-line analog-to-digital converter (Delay-line ADC) and a Flash analog-to-digital converter (Flash ADC). The output voltage of the switch DC-DC converter is detected and the voltage is converted into a corresponding numerical code. The analog-to-digital converter of the invention is applied to the analog-to-digital converter of a high-frequency digital control switch DC-DC converter. When the converter stably works, the delay-line analog-to-digital converter quickly and accurately detects the subtle change of the output voltage; even when the switching frequency is relatively high, the analog-to-digital converter still has good response; and when relatively big change of the output voltage of the converter is caused by the change of an input voltage or a load, the Flash ADC can quickly and accurately detect the change of the voltage in a wide range, so that the analog-to-digital converter can meet the requirement on quick response of the switch DC-DC converter system.

Description

technical field [0001] The invention relates to an analog-to-digital converter, in particular to an analog-to-digital converter suitable for a digitally controlled switch DC-DC converter. Background technique [0002] Switching DC-DC converters are widely used in portable electronic products due to their high efficiency, small size, high reliability and low cost. Compared with the earlier developed and relatively mature analog control technology, digital control technology has the advantages of high integration, strong programmability and short invention cycle. More complex control strategies can be realized, and it is beneficial to the system-level low power consumption design of electronic products, thereby improving the overall characteristics of the system. In digital processing chips of portable devices, the rapid development of dynamic voltage scaling (DVS) technology poses a series of challenges to the design of digitally controlled switching DC-DC converters. Among ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12
Inventor 李世杰耿莉范世全王轲王胜磊高源
Owner XI AN JIAOTONG UNIV
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