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DC-DC converter with load transient response fast reaction and method thereof

A direct-current to direct-current, fast-response technology, applied to conversion equipment, instruments, and electric variable adjustments without intermediate conversion to AC, it can solve problems such as slow response time, unable to quickly increase output voltage, and sudden drop in output voltage

Inactive Publication Date: 2007-09-12
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the load current changes instantaneously, for example, the load current rises instantaneously, resulting in a sudden drop in the output voltage. Since the sawtooth signal is used as the basis for adjusting the duty cycle, under the transient response of the load, the traditional DC-DC converter adjusts The response time of this duty cycle is slow, so that the output voltage cannot be quickly raised to the desired level

Method used

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  • DC-DC converter with load transient response fast reaction and method thereof
  • DC-DC converter with load transient response fast reaction and method thereof
  • DC-DC converter with load transient response fast reaction and method thereof

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Embodiment Construction

[0041] FIG. 1 is a circuit diagram of a DC-DC converter 100 of the present invention, which includes an output stage composed of a low-voltage side NMOS transistor 102 and a high-voltage side NMOS transistor 104. The source of the low-voltage side NMOS transistor 102 is connected to a ground terminal GND. , the drain is connected to the converter output terminal 108 via the inductor 106, the source of the high-side NMOS transistor 104 is connected to the output terminal 108 via the inductor 106, and the drain is connected to an input power supply voltage V IN , the gates of the low-side NMOS transistor 102 and the high-side NMOS transistor 104 are respectively connected to the inverting output Q of an RS flip-flop 110 and the output of the inverter 112 to be switched under the control of the driving signals LG and HG to generate an output Current I OUT flows through the inductor 106 and generates an output voltage V at the converter output 108 OUT . A voltage divider compose...

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Abstract

This invention relates to a DC-DC converter with load transient quick response and its method including an output stage, a sensing circuit, a driver and a transient quick response circuit, in which, the output stage is connected between an input voltage and a low voltage to be controlled and switched to regulate a working period to generate an output voltage, the said sensing circuit senses the voltage to generate a feedback signal which is compared with a first reference voltage by the said conduction amplifier to generate a first current and is responded by the transient response to generate a second current, the first current is connected with a charge voltage, the driver compares the two reference signals with the voltage to generate a drive signal with the working period to the output stage, the transient response circuit compares the nodal point and second reference voltage to generate bypass signals to drive the output stage.

Description

technical field [0001] The present invention relates to a DC-to-DC converter and its method, in particular to a DC-to-DC converter with fast load transient response and its method. Background technique [0002] DC-to-DC converters have been widely used in various electronic products. Its function is to adjust the voltage level of the input DC voltage, such as step-up or step-down, and stabilize it between the set voltage values. . In a computer system, since the power supplies used by the CPU, memory, and hard disk are different, a DC-to-DC converter is required to adjust different voltages for use by each operating unit in the computer system. [0003] In a traditional DC-DC converter, a driving signal is used to adjust the duty cycle of an output stage to maintain the output voltage within a certain range. A traditional DC-DC converter generates a feedback signal by detecting the output voltage, and an error amplifier compares the feedback signal with a reference signal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10G05F1/46
Inventor 黄南川戴良彬王弘毅黄建荣刘国平廖于棻
Owner RICHTEK TECH