Adjustable input error amplifier for single-stage power factor correction controller
A technology for power factor correction and input error, applied in differential amplifiers, DC-coupled DC amplifiers, and improved amplifiers to improve efficiency, etc., can solve the problems of power loss, low work efficiency, and high cost, and achieve work efficiency and cost savings. , the effect of reducing power loss
Active Publication Date: 2014-03-19
XIDIAN UNIV
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Problems solved by technology
Since this traditional error amplifier cannot adjust the input voltage according to the different working modes of the circuit, the circuit still performs error amplification and comparison when the circuit is not working normally, so it will cause power loss, low work efficiency and high cost.
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[0043] The circuit structure of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0044] refer to figure 2 , the adjustable input error amplifier of the present invention includes: a first buffer voltage module 1 , a second buffer voltage module 2 , a transmission control module 3 and an operational amplifier module 4 .
[0045] The first buffer voltage module 1 is provided with an input terminal A and two output terminals B and C; wherein the input terminal A is connected to an externally provided reference voltage V1; the output terminal B outputs a reference voltage divider V4; the output terminal C outputs Reference voltage divider V5;
[0046] The second buffer voltage module 2 is provided with an input terminal A and two output terminals B and C; wherein the input terminal A is connected to the feedback voltage V2 provided externally; the output terminal B outputs the feedback voltage divider V6; the output termina...
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The invention discloses an adjustable input error amplifier for a single-stage power factor correction controller. The adjustable input error amplifier mainly solves the problems that an existing error amplifier cannot adjust an input voltage, so that electric energy losses are generated, the working efficiency is low, and the cost is high. The error amplifier comprises a first buffer voltage module (1), a second buffer voltage module (2), a transmission control module (3) and an operational amplifier module (4); the first buffer voltage module (1) and the second buffer voltage module (2) perform voltage division on a standard voltage provided by an external and a feedback voltage provided with the external to output different standard voltages and different feedback voltages; under the control of an enable signal provided by the external, the transmission control module (3) performs switching between the different standard voltages and the different feedback voltages according to different operating modes, one of the different standard voltages and one of the different feedback voltages are selected and input into the operational amplifier module (4), and error amplification signals are output. The adjustable input error amplifier for the single-stage power factor correction controller achieves the adjustable input function, effectively reduces electric energy losses and improves the operating efficiency of circuits.
Description
technical field [0001] The invention belongs to the technical field of electronic circuits, and relates to an analog integrated circuit, in particular to an adjustable input error amplifier for a single-stage power factor correction controller. Background technique [0002] With the wide application of rectifier bridges in electronic equipment, the input mains current contains a large number of harmonic components, which reduce the power supply efficiency of the grid and enhance electromagnetic interference. Therefore, power factor correction must be adopted in electronic equipment technology. In the power factor correction circuit design, the error amplifier circuit is a very important module and the core of a successful system design. figure 1 shows the block diagram of a conventional error amplifier. [0003] like figure 1 As shown, the circuit mainly includes the operational amplifier module. The reference voltage V1 and the feedback voltage V2 pass through the opera...
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Login to View More IPC IPC(8): H03F3/45H03F1/02
Inventor 叶强邵丽丽张铎澜来新泉
Owner XIDIAN UNIV