Dual-loop charge pump control circuit with discontinuous current control
A technology of charge pump control and current regulation circuit, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of reducing the efficiency of the charge pump, large output ripple of the charge pump circuit, overcharge, etc., to improve stability, improve Efficiency, the effect of reducing output ripple
Active Publication Date: 2017-10-31
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology
The charge pump circuit in the prior art generally adopts the way of controlling the intermittent oscillation of the oscillator to keep the output voltage stable. With this structure, the output ripple of the charge pump circuit is relatively large, and there is a problem of overcharging at the same time, which greatly reduces the charge pump. efficiency
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[0030] see Figure 1 to Figure 5 As shown, a discontinuous current control dual-loop charge pump circuit provided by an embodiment of the present invention includes a charge pump main circuit P, a sampling voltage generation circuit 10 , a frequency control circuit 20 , and a current regulation circuit 30 . The charge pump main circuit P is connected to the frequency control circuit 20 , the current regulation circuit 30 and the sampling voltage generation circuit 10 respectively. The sampling voltage generation circuit 10 is connected to the frequency control circuit 20 and the current regulation circuit 30 respectively. The current regulation circuit 30 is connected to the frequency control circuit 20 . Wherein, the charge pump main circuit P periodically increases or decreases the voltage through the clock signals CLKA and CLKB. The voltage output VOUT generates a voltage output VOUT higher than the power supply voltage or lower than 0 level based on the clock signals CLK...
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The present invention relates to the field of charge pump circuits, and discloses a dual-loop charge pump circuit controlled by discontinuous current, which includes a charge pump main circuit P, a sampling voltage generating circuit, a current regulating circuit, and a frequency control circuit; the charge pump main circuit P, through The clock signal CLKA, CLKB periodically increases or decreases the voltage to generate a voltage output VOUT higher than the power supply voltage or lower than 0 level; the sampling voltage generation circuit, the output of the voltage output VOUT is higher than the power supply voltage or lower The sampling voltage Vs is obtained by sampling at 0 level; the frequency control circuit, under the control of the sampling voltage Vs, generates a square wave signal for controlling the current regulation circuit; the current regulation circuit controls the main charge pump based on the square wave signal generated by the control circuit. output of circuit P. The dual-loop charge pump circuit with discontinuous current control provided by the present invention can generate two clock signals CLK1 and CLK2 to jointly adjust the charge pump, so that the output voltage of the charge pump reaches a predetermined value, which can improve the stability of the output voltage of the charge pump and reduce the The advantage of small output ripple.
Description
technical field [0001] The invention relates to the field of charge pump circuits, in particular to a double-loop charge pump circuit controlled by discontinuous current. Background technique [0002] A charge pump circuit is a circuit that generates a high voltage by accumulating charge in a capacitor, and it is widely used in nonvolatile memory circuits. The charge pump circuit in the prior art generally adopts the way of controlling the intermittent oscillation of the oscillator to keep the output voltage stable. With this structure, the output ripple of the charge pump circuit is relatively large, and there is a problem of overcharging at the same time, which greatly reduces the charge pump. efficiency. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a double-loop charge pump circuit with discontinuous current control that improves the stability of the output voltage of the charge pump and reduces the output...
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IPC IPC(8): H02M3/07
Inventor 龙爽陈岚陈巍巍杨诗洋
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI