Fast transient response DC-DC (direct-current to direct-current) switching converter with high load regulation rate
A switching converter and transient response technology, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, and adjustment of electrical variables, so as to avoid large capacitor compensation, save voltage to current circuit, and improve transient response. The effect of state response speed
Active Publication Date: 2015-04-08
SOUTHEAST UNIV
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Problems solved by technology
Although the traditional switching converter linear control network has a simple technical control method, the transient response is difficult to meet the requirements of today's sudden load changes, so it is necessary to increase the transient response speed booster
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[0019] The block diagram of a switching converter that improves the transient response speed and load regulation rate proposed by the present invention is as follows figure 1 shown. The error amplifier 104 and the voltage detector 105 sample the output voltage V of the BUCK topology circuit 106 OUT , respectively with the reference voltage V REF For comparison, the output terminals of the error amplifier 104 and the voltage detector 105 are superimposed and input to the terminal of the pulse width modulator 103 . The current detection circuit 101 detects the inductor current in the BUCK topology circuit 106 , and the slope compensation circuit 102 generates a periodic ramp signal, which is superimposed with the output signal of the current detection circuit 101 and input to the input terminal of the pulse width modulator 103 . The output terminal of the pulse width modulator 103 controls the power tube grid signal of the BUCK topology circuit 106, so as to achieve the purpos...
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A fast transient response DC-DC switching converter with a high load regulation rate, which is provided with an electric current detection circuit (101), a slope compensation circuit (102), a pulse width modulator (103), a BUCK topology circuit (106) containing a power transistor, an output inductor, a filtering capacitor and a load, an error amplifier (104) and a voltage detector (105). The error amplifier (104) and the voltage detector (105) sample the output voltages VOUT of the BUCK topology circuit (106) and compare same to a reference voltage VREF respectively, output signals of the error amplifier (104) and the voltage detector (105) are superposed and input to the pulse width modulator (103), the electric current detection circuit (101) detects the inductive current in the BUCK topology circuit (106), a periodic slope signal generated by the slope compensation circuit (102) and an output end signal of the electric current detection circuit (101) are superposed and input to an input end of the pulse width modulator (103), and an output end of the pulse width modulator (103) controls a power transistor gate signal in the BUCK topology circuit (106). The fast transient response DC-DC switching converter with a high load regulation rate can improve the transient response speed of the output voltage of the switching converter, and can reduce the steady-state error range of the output voltage to increase the load regulation rate.
Description
technical field [0001] The present invention relates to medium load transient response and load regulation rate in switching power supply converters, in particular to a fast transient response DC-DC switching converter with high load regulation rate, which can improve the transient response of the switching converter output voltage State response speed, and can reduce the steady-state difference range of the output voltage to improve the load regulation rate. Background technique [0002] Nowadays, the application of a large number of smart terminals and handheld devices has put forward higher and higher requirements on the sudden change of load current and fast output transient response of switching converters. In order to save energy and prolong battery life, the microprocessor often needs to switch quickly between different working states such as "sleep mode", "normal operation", etc., which requires the output of the power supply to have a fast transient response capabil...
Claims
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IPC IPC(8): H02M3/156
CPCH02M2003/1566H02M3/156H02M3/1566
Inventor 孙伟锋杨淼韩才霞秦昌兵张力文徐申陆生礼时龙兴
Owner SOUTHEAST UNIV