Switching voltage-stabilized power supply based on multi-stage power amplification balanced modulation circuit
A technology of switching regulated power supply and power amplification, which is used in output power conversion devices, regulating electrical variables, converting DC power input to DC power output, etc., and can solve problems such as large ripple coefficient, low efficiency, and radio frequency interference. Achieve the effect of stable output value, improved control range of output current change, and reduced radio frequency interference
Inactive Publication Date: 2015-03-25
CHENGDU COPOO TECH
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of large ripple coefficient, serious radio frequency interference, complex circuit and low efficiency existing in the current switching regulated power supply, and provide a switching regulated power supply based on a multi-stage power amplification balanced modulation circuit
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[0020] Such as figure 1 As shown, the present invention mainly consists of a diode rectifier U, a power amplifier P1, a voltage comparator U2, a transformer T, a balance adjustment circuit, a switch filter circuit, a power supply output circuit, a variable voltage feedback circuit, a switch control circuit, an oscillator, and a current comparator I1, current comparator I2, slope compensator W, PWM controller, sliding regulator and logic protection amplifier circuit.
[0021] Wherein, the transformer T is composed of a primary coil L1 disposed on the primary side, a secondary coil L2 disposed on the secondary side, and a secondary coil L3 disposed on the secondary side. In the present invention, a sliding tap is provided on the primary side coil L1 of the transformer T, and the sliding tap is controlled by a sliding regulator to ensure that the transformer is adjusted according to the duty ratio of the PWM controller and the common result of the switching control circuit. The ...
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The invention discloses a switching voltage-stabilized power supply based on a multi-stage power amplification balanced modulation circuit. The switching voltage-stabilized power supply is mainly composed of a diode rectifier U, a power amplifier P1, a voltage comparator U2, a transformer T, a balanced adjustment circuit, a switching filter circuit and the like, wherein the balanced adjustment circuit is connected between the diode rectifier U and the voltage comparator U2 in series, the switching filter circuit is connected between the balanced adjustment circuit and the power amplifier P1 in series. The switching voltage-stabilized power supply is characterized in that a logic protection amplifying circuit is further connected between the Q end of the voltage comparator U2 and the negative electrode input end of the power amplifier P1 in series. According to the switching voltage-stabilized power supply based on the multi-stage power amplification balanced modulation circuit, the switching control circuit is composed of field-effect transistors, so that the switching voltage-stabilized power supply has a boosting mode and a voltage reducing mode, a full-voltage-range output current is controlled to be within + / - 0.1%, and compared with a traditional switching voltage-stabilized power supply, the output current change control precision is greatly improved.
Description
technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a switch stabilized voltage power supply based on a multi-stage power amplification balanced modulation circuit. Background technique [0002] With the continuous advancement of science and technology, electronic products have brought great convenience to people's life while their functions are becoming more and more powerful. The voltage stabilizing circuit is easy to operate. The traditional series linear regulating voltage stabilizing circuit has the characteristics of high stability, adjustable output voltage, small ripple coefficient, and simple circuit. However, the adjustment tubes of these series linear adjustment type voltage stabilizing circuits always work in the amplified state, and current flows all the time, so the power consumption of the tubes is relatively large, and the efficiency of the circuit is not high, generally only reaching 30% to 50% %about. ...
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IPC IPC(8): H02M7/217H02M3/335
CPCH02M3/33569H02M7/217
Inventor 罗娅车容俊
Owner CHENGDU COPOO TECH