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DC/DC converter

A converter, voltage conversion circuit technology, applied in instruments, conversion equipment without intermediate conversion to AC, conversion of DC power input to DC power output, etc., can solve problems such as lengthening, waste of power consumption, and slow response speed.

Inactive Publication Date: 2004-06-09
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned conventional step-down DC / DC converter, when the output voltage drops, the transient response time when the voltage is dropped becomes longer, and the output voltage cannot be quickly dropped.
Therefore, electric power loss occurs during this transient response time, and the battery voltage decreases, so it is difficult to make the talk time longer
[0005] Moreover, the above-mentioned conventional DC / DC converter can only perform step-down operation
That is, conventional DC / DC converters cannot perform step-up operation
In addition, the conventional DC / DC converter slows down the response speed of the transient response due to the condition of the load, resulting in wasteful power consumption

Method used

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Examples

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Embodiment Construction

[0027] The present invention provides a step-up and step-down dual-purpose DC / DC converter that solves the above-mentioned problems in the prior art.

[0028] Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

[0029] figure 1 Shows the circuit structure of a mobile phone. The high-frequency signal obtained by the antenna 1 is supplied to the receiving circuit 4 through the duplexer 2. The receiving circuit 4 applies predetermined processing to the input high frequency signal, and then outputs the baseband signal to the baseband circuit 6. The baseband circuit 6 performs predetermined processing on the input baseband signal, and then outputs the audio signal to the speaker 7. As a result, sound is output from the speaker 7. On the other hand, the sound to be transmitted is converted into a sound signal by the microphone 8 and then output to the baseband circuit 6. The baseband circuit 6 applies predetermined proce...

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PUM

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Abstract

A DC / DC converter presented herein is capable of operating in both step-up and step-down process of output voltage, lowering the output voltage at high speed at the time of output voltage drop, or raising the output voltage at high speed at the time of output voltage rise, and decreasing generation of power loss at the time of transient response. This DC / DC converter can extend the call time of handy phone. The DC / DC converter comprises a voltage converting circuit connected between the input terminal and output terminal, a fast transient response circuit, a step-up and step-down operation determining circuit, a voltage comparator, and a switch control circuit.

Description

Technical field [0001] The present invention relates to a DC / DC converter that converts DC voltage used in various electronic equipment, communication devices, and the like. Background technique [0002] Picture 11 Shows a block diagram of a conventional step-down DC / DC converter used in mobile phones. Such as Picture 11 As shown, a series circuit of the first switching circuit 100, the inductor 102, and the smoothing capacitor 104 is connected between the input terminal 111 and the output terminal 112. In addition, the output voltage 120 from the smoothing capacitor 104 and the control voltage 121 from the output voltage control terminal 113 are input to the comparison circuit 105. The output signal of the comparison circuit 105 and the output signal from the oscillation circuit 106 are input to the switching condition determination circuit 107. The output voltage 120 and the switching current detection signal 122 from the first switching circuit 100 are input to the control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M3/158
CPCY02B70/16H02M2001/0032H02M3/1582H02M1/0032Y02B70/10
Inventor 东谷比吕志安保武雄
Owner PANASONIC CORP
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