CN201035499Y

CN201035499Y - Energy-saving ATX computer power supply

Info

Publication number: CN201035499Y
Application number: CNU2007200512683U
Authority: CN
Inventors: 林志填; 胡军春
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-03
Filing date: 2007-05-03
Publication date: 2008-03-12
Anticipated expiration: 2017-05-03

Abstract

The utility model relates to an energy-saving type ATX computer power, which consists of a high voltage rectification filtering circuit, a main power circuit, and a standby power circuit. The high voltage rectification filtering circuit processes an alternating commercial power into the high voltage direct current, the high voltage direct current is divided into two ways, one way is directed to the main power circuit, and the other way is directed to the standby power circuit. The standby power circuit comprises a standby power switch circuit and a standby power transformer, the standby power transformer is provided with two groups of output coils, wherein the voltage outputted by one coil outputs the + 5 VSB of a standby power after being processed though the rectification filtering circuit, and the voltage outputted by the other coil outputs an auxiliary power after being processed though the rectification filtering circuit. The standby power switch circuit can select an integrated circuit IC 4 including the NCP1014 model as an integrated switch circuit. The utility model has the advantages that the circuit is simple, the standby electromagnetic interference signal is low, and the standby energy consumption is low, etc.

Description

Energy-saving ATX computer power

Technical field:

The utility model relates to a kind of power supply, especially a kind of energy-saving computer power.

Background technology:

Computer power at first be with civil power through the high-voltage rectifying filtering circuit High Level AC Voltage (220VAC) be converted to high voltage direct current (+300VDC); divide two-way to walk through filtered high voltage direct current; one the tunnel is sent to main power switch circuit waits for boot action; the standby power circuit is sent on another road; the standby power circuit will be exported two road power supplys by transformer; wherein one the tunnel after handling, exports by the rectifying and voltage-stabilizing filtering circuit standby power+5VSB; another road is output accessory power supply+12V after current rectifying and wave filtering circuit is handled, and supplies with pwm circuit (concussion control protective circuit of voltage regulation) work.

(+5VSB electric current 100mA) is meant that power supply connect to go up the 220V civil power and connect all consumers (integrated circuit board, memory device) but do not start under the S5 pattern, and this moment, overall power dissipation was mainly from the open circuit loss of power supply self and the stand-by power consumption of mainboard.Probably about 100mA, the main flow PC power source workmanship materials general meeting of the real power consumption of power supply preferably at present is about 5W～10W in this state in power consumption, and conversion efficiency is less than 10%; Standby energy consumption is equivalent to each PC and is all using one 5 watts to 10 watts pilot burner the same every day, and standby energy consumption is being sucked the electricity charge and the energy as blood sucker, is also making huge environmental protection pressure simultaneously.

The utility model content:

The purpose of this utility model is to overcome existing computer power under the S5 pattern, and the shortcoming that standby energy consumption is big provides a kind of stand-by energy-saving ATX computer power.

The utility model, form by high-voltage rectifying filtering circuit, main power circuit and standby power circuit, the high-voltage rectifying filtering circuit comprises that (EMI is an electromagnetic interference (EMI) to first order EMI, filtering down together), surge inhibition, second level EMI filtering, full-bridge rectification, power factor correction and high-pressure filter circuit are processed into high voltage direct current 300VDC with civil power 220VAC; High voltage direct current divides two-way, and one the tunnel is sent to main power circuit, and the standby power circuit is sent on another road; Main power circuit comprises main power switch circuit; main power transformer; the rectifying and wave-filtering output circuit; driving transformer; driving switch circuit and concussion control protective circuit of voltage regulation (abbreviate " pwm circuit " as; down together); after pwm circuit is received control signal; connect the driving switch circuit; the output terminal of driving switch circuit connects the input end of driving transformer; the output terminal of driving transformer connects the input end of main power switch circuit; the output terminal of main power switch circuit connects main power transformer; the output winding of main power transformer is after the rectifying and wave-filtering output circuit is handled; the required various DC voltage of output computer; it is characterized in that: the standby power circuit comprises standby power on-off circuit and standby power transformer; the output terminal of standby power on-off circuit connects the input end of standby power transformer; the standby power transformer is provided with two groups of output windings; wherein the voltage of the output of a winding is exported standby power+5VSB after current rectifying and wave filtering circuit is handled; the output voltage of another winding is output accessory power supply+12V after current rectifying and wave filtering circuit is handled, and accessory power supply is connected with pwm circuit.

The utility model, described standby power on-off circuit comprises that model is the integrated circuit (IC) 4 of NCP1014, the 1st pin of IC4 is the Vcc incoming end, be connected by resistance R 504, diode D504 and resistance R 503 on the winding 5-1 of standby power transformer T3, at the two ends of resistance R 504, filter capacitor C502 and the C503 that is connected with common ground is set respectively; The 5th pin of IC4 is the output control terminal of standby power on-off circuit, and the input winding 4-3 by the standby power transformer is connected with high voltage direct current 300VDC; The 4th pin of IC4 is the input end of feedback signal, is connected with the output terminal of standby power+5VSB by photoelectrical coupler IC501 and integrated circuit (IC) 502, capacitor C 506 and resistance R 507, R508, R509, R510; The 2nd, 3,7,8 pin of IC4 are connected with common ground.

The utility model has characteristics such as circuit is simple, the standby electromagnetic interference signal is low, standby energy consumption is low.

Description of drawings:

Fig. 1 is a block diagram of the present utility model; Fig. 2 is the electrical schematic diagram of embodiment; Fig. 3 is the electrical schematic diagram of embodiment standby power circuit part.

Embodiment:

With reference to Fig. 1, Fig. 2, this energy-saving ATX computer power, form by high-voltage rectifying filtering circuit, main power circuit and standby power circuit, the high-voltage rectifying filtering circuit comprises first order EMI filtering, surge inhibition, second level EMI filtering, full-bridge rectification, power factor correction and high-pressure filter circuit, and civil power 220VAC is processed into high voltage direct current 300VDC; Then, high voltage direct current divides two-way, and one the tunnel is sent to main power circuit, and the standby power circuit is sent on another road.

Main power circuit comprises main power switch circuit, main power transformer T1, the rectifying and wave-filtering output circuit, driving transformer, driving switch circuit and pwm circuit, after pwm circuit is received control signal, connect the driving switch circuit, the output terminal of driving switch circuit connects the input end of driving transformer T2, the output terminal of driving transformer T2 connects the input end of main power switch circuit, the output terminal of main power switch circuit connects main power transformer T1, the output winding of main power transformer T1 is exported the required various DC voltage of computer after the rectifying and wave-filtering output circuit is handled.Present embodiment, its high-voltage rectifying filtering circuit and main power circuit are same as the prior art.Wherein, main power switch circuit is made up of core parts Q1, Q2 etc., and the driving switch circuit is made up of core parts Q3, Q4 etc., and concussion protection controlling circuit of voltage regulation is made of core parts IC1 etc.

Power circuit constitutes oscillatory circuit by IC1, driving triode Q3/Q4 and main power switch triode Q1/Q2 and produces high-frequency pulse current.Behind the power knob of pressing lower case, the 4th pin of IC1 becomes low level by high level, power supply is allowed to start, and the pulse signal of presenting 180 ° of two-way phase phasic differences to the semibridge system change-over circuit under the common controls of protection such as overload, overvoltage, under-voltage, short circuit, overcurrent is controlled main power switch triode Q1/Q2 and is taken turns conducting and come high voltage direct current become high-frequency pulse current and send the T1 step-down of main power switch transformer after behind full-wave rectification and the smothing filtering, obtain the required operating voltage of computing machine; Can send to " PowerOK " signal of mainboard after power supply is finished initialization and stablized, the expression power supply can normally use.After mainboard is received this signal, just can begin start-up system.In the main frame operational process if when meeting civil power power down or shutdown, PW-OK output signal ratio ATX Switching Power Supply+5V output voltage shifts to an earlier date the hundreds of millisecond and disappears, notice main frame triggering system is closed before power cut-off automatically, and hard disc magnetic head has little time to move to the touch-down zone and scratches hard disk when preventing unexpected power down.

Please refer to Fig. 3, the standby power circuit comprises standby power on-off circuit and standby power transformer T3, the output terminal of standby power on-off circuit connects the input end of standby power transformer T3, the standby power transformer is provided with two groups of output windings, wherein the voltage of winding output is exported standby power+5VSB after rectifying and voltage-stabilizing filtering circuit (D9, C507, C508, L501) is handled, the output voltage of another winding is output accessory power supply+12V after current rectifying and wave filtering circuit (D505, C10) is handled, and accessory power supply is connected with pwm circuit.Present embodiment, it is the standby power integrated switching circuit of core that its standby power on-off circuit adopts with IC4.All the other standby power transformers and current rectifying and wave filtering circuit are also same as the prior art or close.

The standby power integrated switching circuit comprises that model is the integrated circuit (IC) 4 of NCP1014, the 1st pin of IC4 is the Vcc incoming end, be connected by resistance R 504, diode D504 and resistance R 503 on the winding 5-1 of standby power transformer T3, among the figure, C502 and C503 are filter capacitor; The 5th pin of IC4 is the output control terminal of standby power on-off circuit, and the input winding 4-3 by standby power transformer T3 is connected with high voltage direct current 300VDC, and among the figure, capacitor C 8, resistance R 502 and D503 are biasing circuit; The 4th pin of IC4 is the input end of feedback signal, is connected with the output terminal of standby power+5VSB by photoelectrical coupler IC501 and integrated circuit (IC) 502, capacitor C 506 and resistance R 507, R508, R509, R510; The 2nd, 3,7,8 pin of IC4 are connected with common ground.

After connecting civil power, through filtered high voltage direct current (+300VDC) be sent to the standby power on-off circuit, connect IC4, the chip internal circuit is started working, inner steady oscillation device produces pulse, through the conducting of driver drives fields inside effect transistor with end, make the elementary winding 3-4 of standby power transformer T3 produce high-frequency pulse current,, export two groups of low-voltage ac voltages through the step-down of standby power transformer T3, one the tunnel through rectification, after three terminal regulator voltage stabilizing and the filtering, export a high-quality 2A electric current+5VSB power supply, be added on the mainboard as standby voltage, the one tunnel through rectifying and wave-filtering, output is assisted+the 12V power supply, supplies with chip operations such as IC1.

Because the 5th pin of original state IC4 is in low level, after connecting civil power, through filtered high voltage direct current (+300VDC) the elementary winding 3-4 by standby power transformer T3, make the winding 5-1 of standby power transformer T3 produce induced voltage, induced voltage the 1st pin for IC4 after step-down, rectification, filtering provides Vcc, guarantees the IC4 operate as normal.Because the standby power on-off circuit adopts the NCP1014 integrated circuit (IC) 4 of ONNN company exploitation, the IC4 internal circuit is made of current controller and a field effect transistor of a fixed frequency modes.Provide and comprise soft start, short-circuit protection, frequency inverted, jump circulation, a peak point current and a self-feed system.When bringing onto load moves, fixed-frequency is at 65KHz, when the stable point of electric current falls under the specific value (for example: when the demand energy consumption reduces), feedback signal is by the inside of the 4th pin input IC4, make IC4 enter so-called " circulation of jumping " pattern automatically, extraordinary efficient is provided on light load.Because this is 1/4 place that typically occurs in peak point current, and frequency jumps and helps to reduce the electromagnetic interference (EMI) signal, standby energy consumption drops to very low and does not have noise to occur as a result, and (+5VSB electric current 100mA) consumed power drops to below the 1.5W under the S5 pattern at last, reaches energy-conservation effect.

Claims

1. energy-saving ATX computer power, form by high-voltage rectifying filtering circuit, main power circuit and standby power circuit, the high-voltage rectifying filtering circuit comprises first order EMI filtering, surge inhibition, second level EMI filtering, full-bridge rectification, power factor correction and high-pressure filter circuit, and civil power 220VAC is processed into high voltage direct current 300VDC; High voltage direct current divides two-way, and one the tunnel is sent to main power circuit, and the standby power circuit is sent on another road; Main power circuit comprises main power switch circuit; main power transformer; the rectifying and wave-filtering output circuit; driving transformer; driving switch circuit and concussion control protective circuit of voltage regulation; it is pwm circuit; after pwm circuit is received control signal; connect the driving switch circuit; the output terminal of driving switch circuit connects the input end of driving transformer; the output terminal of driving transformer connects the input end of main power switch circuit; the output terminal of main power switch circuit connects main power transformer; the output winding of main power transformer is after the rectifying and wave-filtering output circuit is handled; the required various DC voltage of output computer; it is characterized in that: the standby power circuit comprises standby power on-off circuit and standby power transformer; the output terminal of standby power on-off circuit connects the input end of standby power transformer; the standby power transformer is provided with two groups of output windings; wherein the voltage of winding output is exported standby power+5VSB after the rectifying and voltage-stabilizing filtering circuit is handled; the voltage of another winding output is output accessory power supply+12V after current rectifying and wave filtering circuit is handled, and accessory power supply is connected with pwm circuit.

2. energy-saving ATX computer power according to claim 1, it is characterized in that: described standby power on-off circuit comprises that model is the integrated circuit (IC) 4 of NCP1014, the 1st pin of IC4 is the Vcc incoming end, be connected by resistance R 504, diode D504 and resistance R 503 on the winding 5-1 of standby power transformer T3, at the two ends of resistance R 504, filter capacitor C502 and the C503 that is connected with common ground is set respectively; The 5th pin of IC4 is the output control terminal of standby power on-off circuit, and the input winding 4-3 by the standby power transformer is connected with high voltage direct current 300VDC; The 4th pin of IC4 is the input end of feedback signal, is connected with the output terminal of standby power+5VSB by photoelectrical coupler IC501 and integrated circuit (IC) 502, capacitor C 506 and resistance R 507, R508, R509, R510; The 2nd, 3,7,8 pin of IC4 are connected with common ground.