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Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method

A technology of pulse width modulation and automatic adaptation, which is applied in the direction of output power conversion device, electrical variable adjustment, control/regulation system, etc. It can solve the problems affecting the instantaneous response time of control signals, and achieve real-time response to load changes and rapid response Time, improve the effect of electromagnetic noise interference

Inactive Publication Date: 2007-03-21
NIKO SEMICON
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Problems solved by technology

[0014] In addition, the fixed on-time control method requires the use of the error amplifier 23 to achieve modulation control. This method will affect the transient response time of the control signal due to the limitation of the bandwidth of the error amplifier 23 itself. response)

Method used

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  • Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method
  • Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method
  • Automatic adapting voltage positioning high-speed pulsewidth modulation controller and method

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Embodiment Construction

[0068] Referring to FIG. 5 , it is a schematic diagram of the circuit architecture of the high-speed pulse width modulation control device for automatically adapting to voltage positioning used in a step-down DC-DC conversion circuit according to the present invention. The high-speed pulse width modulation control device 3 that integrates active load detection and automatic voltage positioning adjustment of the present invention obtains the current detection signal from the detection resistor Rs through two signal input terminals CSN and CSP, and then obtains the current detection signal from the output branch through the FB feedback terminal. The voltage feedback signal Vfb is obtained from the piezoresistor R2 (when the output voltage Vout is low, the voltage feedback signal Vfb can be directly obtained from the output voltage Vout). In the pulse width modulation control device 3, the voltage feedback signal Vfb plus a compensation voltage signal Vslope generates a feedback v...

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Abstract

This invention discloses a high velocity PWM control device automatically suiting location of voltages and its driving signal generation method, which automatically detects changes of a load to regulate location of voltage timely to stabilize and save output power of loads timely. This invention does not use frequency of periodic signal as the proof for generating drive signals nor an error amplifier as the control to modulation, therefore the invention has quick response time to express the change of loads to get the stable result. When working at a stable state and a continuous conduction mode, even if the Vin and Vout have changed, the switch frequency of the controller remains unchanged so as to improve the effect of EMI.

Description

technical field [0001] The present invention relates to a high-speed pulse width modulation control device that automatically adapts to voltage positioning and a method for generating a driving signal thereof, in particular to a switchable DC-DC power conversion device that can detect load changes in real time. Quick response, to achieve the purpose of maintaining the stability of the power system controller and its drive signal generation method Background technique [0002] There are generally two types of technologies for controlling switching DC-DC power conversion. One is to use a periodic signal (clock signal) as the frequency of control switching, and the other is to achieve control switching without using a clock signal. For techniques using periodic signals, the frequency of the switching signal for DC-DC power conversion is fixed and equal to the frequency of the periodic signal. The duty cycle (D) of the switching signal is usually leading-edge modulation (leadin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/137G05F1/46
Inventor 吴俊政黄勤段晓明
Owner NIKO SEMICON