Controller IC and its application

A controller, switching power supply technology, applied in control/regulating systems, instruments, regulating electrical variables, etc., can solve the problem of not satisfying high-density, small-volume, low-cost power supply systems, high procurement costs and production costs, and PCB layout difficulties, etc. It can reduce the PCB layout area and volume, reduce production costs and procurement costs, and meet the needs of high density, small volume and low cost.

Active Publication Date: 2019-01-15
SHENZHEN NANYUN MICROELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Visible, in figure 1 and figure 2 In the prior art shown, in order to meet the requirements of wide-range input, there are many peripheral components, PCB layout is difficult, the volume is large, the purchase cost and production cost are high, and it does not meet the needs of high-density, small-volume and low-cost power supply systems

Method used

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  • Controller IC and its application
  • Controller IC and its application
  • Controller IC and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Figure 4 This is a simplified circuit diagram of the present invention in the application scenario of the optocoupler feedback flyback power supply, and the secondary side optocoupler, TL431 and loop compensation parts are omitted. The controller IC described in the present invention is a circuit in the controller 10, and other circuits in the controller 10 have nothing to do with the present invention, and will not be described here. Figure 4 The main power topology is known technology, including the input voltage V IN , output voltage V OUT , capacitor C VIN , C VDD and C OUT , controller 10, main power transformer, auxiliary winding Ns2, main power tube M1, diode D 1 , D 2 and D OUT , inductance L 1 and sampling resistor R CS and other components. The GT pin is the drive output of the controller 10, which is used to control the turn-on and turn-off of the power tube M1; the VDD pin is the power input pin of the controller 10, which is used for the power s...

Embodiment 2

[0081] like Image 6 As shown, compared with the first embodiment, the difference is that the BOS end of the controller is externally connected to the ground, and the boost function is not implemented.

[0082] The basic working principle of this embodiment:

[0083] like Image 6 As shown, the BOS port of the controller is at the ground potential, so that the gate signal of the N-channel MOS transistor M3 is the ground potential, the MOS transistor M3 is not conducting, and its drain potential is pulled by the conduction of the P-channel MOS transistor M5 It becomes a high level, so that the output signal Boost_L is a high level, indicating that the boost function is invalid.

[0084] At this time, the Boost_L signal is input into the boost startup and shutdown point selection module, so that its output signal ENP_BT becomes low, and the enable is invalid; at the same time, the Boost_L signal is input into the IC startup point selection module, so that its output signal ENP...

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PUM

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Abstract

The invention provides a controller IC with integrated power transistor M1 and boosting function, and the controller IC internally comprises a boosting start-up and shutdown point selection module, Aboost start-up and shutdown point selection module can realize that that control IC has a boost function when the BOS terminal is connected with an external device, When the BOS terminal is grounded,the controller IC has no boosting function, and the wide-range input requirement is realized only by a controller IC and the periphery of the boosting topology only by inductors and diodes, so that the peripheral circuit is simplified, the area and volume of the PCB board are reduced, the cost is reduced, and the requirements of a high-density, small-volume and low-cost power supply system are met.

Description

technical field [0001] The invention relates to a controller IC, in particular to a controller IC of a switching power converter. Background technique [0002] With the development of new energy technologies, DC-DC converters with a wide input voltage range in switching power supplies have received extensive attention. The switching power supply DC-DC converter is mainly composed of the main circuit and the controller. The main circuit is used for power conversion, and is generally composed of switching devices and rectifier filter circuits. The circuit structures include Buck, Boost, flyback, full bridge and so on. The controller is used to detect the working state of the converter circuit, and to generate a control pulse signal to control the switching device in the converter, and to adjust the power delivered to the load to stabilize the output. [0003] like figure 1 shown, is a simplified diagram of a wide-range input application circuit, the main power topology is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523
Inventor 赵志伟
Owner SHENZHEN NANYUN MICROELECTRONICS CO LTD
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