CN202550887U

CN202550887U - LLC (Logical Link Control) dead time self-adaptive regulation structure

Info

Publication number: CN202550887U
Application number: CN2012201217394U
Authority: CN
Inventors: 许若鹏
Original assignee: WUXI ADPOWER TECHNOLOGY CO LTD
Current assignee: WUXI ADPOWER TECHNOLOGY CO LTD
Priority date: 2012-03-28
Filing date: 2012-03-28
Publication date: 2012-11-21
Anticipated expiration: 2022-03-28

Abstract

The utility model discloses an LLC (Logical Link Control) dead time self-adaptive regulation structure. The LLC dead time self-adaptive regulation structure consists of an output information sampling module, a dead time output module and an LLC module, wherein the output information sampling module is used for acquiring output signals from an LLC power supply and transmitting the output signals to the dead time output module, the dead time output module is used for conditioning the output signals into dead time signals which can be received and recognized by the LLC module, and the LLC module is used for outputting switching signals containing different dead times according to the dead time signals and controlling the on/off of a switching tube of the LLC power supply. According to the LLC dead time self-adaptive regulation structure, the dead time can be automatically regulated according to different load states, and thus, the efficiency of a switching power supply using an LLC topology is effectively increased.

Description

The Dead Time self-adaptive regulating structure of a kind of LLC

Technical field

The utility model belongs to the control structure of Switching Power Supply, relates in particular to a kind of structure of the LLC of adjusting circuit Dead Time.

Background technology

The LLC topology is widely used in high efficiency Switching Power Supply, and the Dead Time of LLC is generally fixed at present, but this mode can not satisfy Switching Power Supply needed different Dead Times under the different loads state, has limited Switching Power Supply and has further raised the efficiency.

The utility model content

The purpose of the utility model is to provide the Dead Time self-adaptive regulating structure of a kind of LLC, is implemented in the different Dead Time of generation under the different load conditions.

The technical scheme of the utility model is following:

The Dead Time self-adaptive regulating structure of a kind of LLC; Form by the output information sampling module that is linked in sequence, Dead Time output module and LLC control module; The output information sampling module is connected with the output of LLC power supply, and the LLC control module is connected with the switching tube of LLC power supply; Said output information sampling module is gathered the output signal of LLC power supply; And be transferred to the Dead Time output module; The Dead Time output module is nursed one's health out can be by the Dead Time signal of acceptance of LLC control module and identification; The LLC control module is exported the switching signal that contains different Dead Times according to this dead band time signal, the break-make of the switching tube of control LLC power supply.

Its further technical scheme is: said output information sampling module comprises that output current sampling and output voltage sample, output be the composite signal of different output voltages and output current.

Its further technical scheme is: the Dead Time signal that said Dead Time output module is nursed one's health out can be different impedance, electric current, voltage and high-low level.

Its further technical scheme is: said output information sampling module is made up of two operational amplifiers and an optocoupler; The two-way output of LLC power supply is connected respectively to the end of oppisite phase of two operational amplifiers; The output of two operational amplifiers all is connected with optocoupler, is connected with compensating network between the end of oppisite phase of two operational amplifiers and the output respectively.

The useful technique effect of the utility model is:

The utility model can automatically be regulated Dead Time according to different load conditions, thereby in very wide loading range, can both improve the power utilization rate.

Description of drawings

Fig. 1 is the structured flowchart of the utility model.

Fig. 2 is the hardware circuit diagram of the utility model.

Embodiment

Further specify below in conjunction with the embodiment of accompanying drawing the utility model.

Fig. 1 shows the composition frame chart of the utility model.As shown in Figure 1, the utility model is made up of the output information sampling module A that is linked in sequence, Dead Time output module B and LLC control module C, and the remaining part among Fig. 1 is to use the Switching Power Supply of LLC topology.Wherein, output information sampling module A is connected with the output of LLC power supply; LLC control module C is connected with the switching tube of LLC power supply.

Output information sampling module A gathers the output information of LLC power supply and exports to Dead Time output module B; Dead Time output module B nurses one's health out the Dead Time signal that LLC control module C can discern and accept, and LLC control module C is again according to other Signal-controlled switch pipe K1 of signal combination of Dead Time output module B and the Kai Heguan of switching tube K2.

Look concrete applied environment, the output information that output information sampling module A gathers can be output voltage, output current, power output.Signal after the Dead Time output module B conditioning can be different impedance, electric current, voltage and high-low level.LLC control module C is according to the switching signal that contains different Dead Times of the synthetic final control switch pipe of the signal combination oscillator of Dead Time output module B and other logical signals, thereby realizes regulating automatically Dead Time, improves the power utilization rate.

The embodiment of Fig. 2 clear the utility model with more detailed hardware circuit diagram.

As shown in Figure 2; When power work in Voltage loop following time; The output information sampling module A that is made up of operational amplifier OP1, operational amplifier OP2, optocoupler OPTO gathers output voltage, and through optocoupler OPTO this signal is transferred to LLC control module C, and this signal is also as the input signal of Dead Time output module B simultaneously; After nursing one's health, output signal to LLC control module C, thereby realize the self adaptation adjustment of Dead Time.

When power work in electric current loop following time; Output information sampling module A gathers output current through resistance R s; And this signal is transferred to LLC control module C through optocoupler OPTO; This signal also as the input signal of Dead Time output module B, outputs signal to LLC control module C after nursing one's health simultaneously, thereby realizes the self adaptation adjustment of Dead Time.

Above-described only is the preferred implementation of the utility model, and the utility model is not limited to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite of the basic design that does not break away from the utility model, all should think to be included within the protection range of the utility model.

Claims

1. the Dead Time self-adaptive regulating structure of a LLC; It is characterized in that: form by the output information sampling module that is linked in sequence, Dead Time output module and LLC control module; The output information sampling module is connected with the output of LLC power supply, and the LLC control module is connected with the switching tube of LLC power supply;

Said output information sampling module is gathered the output signal of LLC power supply; And be transferred to the Dead Time output module; The Dead Time output module is nursed one's health out can be by the Dead Time signal of acceptance of LLC control module and identification; The LLC control module is exported the switching signal that contains different Dead Times according to this dead band time signal, the break-make of the switching tube of control LLC power supply.

2. according to the Dead Time self-adaptive regulating structure of the said LLC of claim 1, it is characterized in that: said output information sampling module comprises that output current sampling and output voltage sample, output be the composite signal of different output voltages and output current.

3. according to the Dead Time self-adaptive regulating structure of the said LLC of claim 1, it is characterized in that: the Dead Time signal that said Dead Time output module is nursed one's health out can be different impedance, electric current, voltage and high-low level.

4. according to the Dead Time self-adaptive regulating structure of the said LLC of claim 1; It is characterized in that: said output information sampling module is made up of two operational amplifiers and an optocoupler; The two-way output of LLC power supply is connected respectively to the end of oppisite phase of two operational amplifiers; The output of two operational amplifiers all is connected with optocoupler, is connected with compensating network between the end of oppisite phase of two operational amplifiers and the output respectively.