CN102403893A

CN102403893A - High-power high-efficiency charge pump circuit

Info

Publication number: CN102403893A
Application number: CN2010102777365A
Authority: CN
Inventors: 王星光
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-10
Filing date: 2010-09-10
Publication date: 2012-04-04

Abstract

The invention relates to a charge pump circuit, which can convert supplied current voltage into negative voltage, positive-negative double voltage and multiple voltage. A pulse width modulation (PWM1) is adopted to supply control signals, and a multi-channel isolation direct-current output circuit (DC1) supplies power to photoelectric isolation gate pole drive chips or magnetic isolation gate pole drive chips (OP1, OP2, OP3 and OP4). The photoelectric isolation gate pole drive chips or the magnetic isolation gate pole drive chips drive an electronic switch composed of metal-oxide-semiconductor field effect transistors (MOSFETs) or insulated gate bipolar transistors (IGBTs) (N11, N12, N21, N22, N31, N32, N41 and N42) so as to transfer charge of capacitors (C1, C2 and C3). The charge pump circuit achieves different functions through series connection, parallel connection or different connection methods with an input end.

Description

The high-power high-efficiency charge pump circuit

Technical field

The present invention relates to charge pump circuit, convert the direct voltage that provides into negative voltage, positive and negative pair of voltage, many times of voltages.Can carry out hundreds of watts, kilowatt more than high power conversion, cell translation efficient can reach 95%～99%.And can apply it in the batteries that to carry out high-power dynamic power balanced for batteries.

Background technology

Problems such as traditional high power DC-direct current (DC-DC) change-over circuit adopts power inductance or transformer as energy conversion unit, exists conversion efficiency not high, and electromagnetic interference is serious.Conventional charge pump class then receives the restriction of electronic switch and type of drive, can't realize high-powerly, is mainly used in small-power, little current circuit.

Summary of the invention

This element circuit by one 4 tunnel (and more than) isolated DC output 5V～20V circuit, two-way (and more than) PWM (pulse-width modulation) circuit, 4 (and more than) light electric or magnetic isolate 4 electronic switches that gate pole chip for driving, 8 (and more than) MOSFET (metal oxide semiconductor field effect tube) or IGBT (insulated gate bipolar transistor) form, 1 (and more than) input buffering electric capacity, 1 (and more than) conversion storage capacitor, 1 (more than reaching) output capacitance is formed jointly.

Circuit adopts isolated DC output 5V～20V circuit to isolate the gate pole chip for driving with the light electric or magnetic, solves the control problem that is difficult to that current potential difference that the diverse location at electronic switch place causes caused.Employing has the control sequence of the pwm circuit solution electronic switch of Dead Time (Death-Time), and guarantees the not conducting simultaneously of electronic switch of out of phase.

Through with this element circuit series, parallel, and different connected modes, can realize the negative voltage circuit, positive and negative pair of voltage, many voltage-multiplying circuits, and the equilibrium of storage battery dynamic power with input voltage.Because power MOSFET has low-down conducting resistance, so the conversion efficiency of this circuit is very high, under the rated power, can reach 95%～99%, than traditional circuit very big advantage is arranged.

Description of drawings

Fig. 1 is that element circuit of the present invention is implemented circuit diagram;

Fig. 2 is the pulse width signal phase place and the Dead Time key diagram of element circuit of the present invention;

Fig. 3 is the reduced graph of element circuit of the present invention;

Fig. 4 is the negative pressure circuit diagram that element circuit of the present invention constitutes;

Fig. 5 is the voltage-multiplying circuit figure that element circuit of the present invention constitutes;

Fig. 6 is many voltage-multiplying circuits figure that element circuit series connection of the present invention constitutes;

Fig. 7 is many voltage-multiplying circuits figure that element circuit cascade of the present invention constitutes;

Fig. 8 is that element circuit of the present invention constitutes storage battery dynamic power equalizer figure;

Embodiment

As shown in Figure 1, PIN+, PIN-insert DC power supply B1, and capacitor C 1 is recharged; Circuit DC1 produces the output of 4 road isolated DCs (V1+, V1-... V4+ V4-) is OP1, OP2, OP3, OP4 power supply; When the CP1 of PWM1 circuit output high level, signal is control N11, N12, N21, N22 conducting after OP1, OP2 isolate, and capacitor C 1 is charged to C2; When CP2 output high level, signal is control N31, N32, N41, N42 conducting after OP3, OP4 isolate, and capacitor C 2 is charged to C3; As shown in Figure 2, because CP1 and CP2 are complementation and the pulse width signal that has Dead Time, N11, N12, N21, N22 form electronic switch and N31, N32, N41, N42 form not conducting simultaneously of electronic switch; Final POUT+, POUT-with output and PIN+, PIN-is identical and the direct voltage of isolating.

Circuit DC1 is conventional small-power isolated DC output circuit, every road output 5～20V voltage.Circuit PWM 1 is conventional pulse-width modulation circuit, produces complementary and has the pulse width signal of Dead Time.

Shown in Figure 3 is the reduced graph of this element circuit, in order to explain the subsequent applications circuit.

As shown in Figure 4, POUT+ is connected with PIN-, POUT-will export the negative voltage with respect to input voltage this moment; PIN+, POUT+, POUT-will constitute positive negative circuit; For example: the PIN+ input voltage is 12V, and then POUT-is output as-12V, and POUT+ is that public ground .PIN+ is+12V.

As shown in Figure 5, POUT-is connected with PIN+, POUT+ is with the twice of output-input voltage at this moment.For example: input voltage is 12V, and then POUT+ will export 24V.

As shown in Figure 6, with a plurality of unit U1 ... Un connects, output voltage=input voltage * unit number that this moment is final.

As shown in Figure 7, with a plurality of unit U1 ... Un carries out cascade, voltage=input voltage * (the unit number ^2) of output this moment.For example: input voltage is 12V, and unit number is 4, and then output voltage is 192V.

As shown in Figure 8; With a plurality of unit U1 ... The parallel connection of Un input, output and B1 ... The Bn batteries connects, because MOSFET has bi directional conductibility property; Electric charge will flow to lower batteries from the higher storage battery of voltage ratio, and will be balanced to realize the batteries dynamic power.

The power output of element circuit of the present invention and efficient are by the conducting resistance of the electronic switching device that is adopted and the ESR of electric capacity (series equivalent resistance) decision.In the experiment test, under rated power, cell translation efficient can reach 95%～99%.Circuit have can connect can the parallel connection advantage, can obtain the voltage of higher multiple or bigger power.

Claims

1. charge pump circuit; It is characterized in that; By a pulse-width modulation circuit (PWM1) control signal is provided; Multichannel isolated DC output 5～20V circuit (DC1) is isolated gate pole chip for driving (OP1, OP2, OP3, OP4) power supply for the light electric or magnetic, and the light electric or magnetic is isolated gate pole chip for driving (OP1, OP2, OP3, OP4) and driven the electronic switch (N11, N12, N21, N22, N31, N32, N41, N42) that is made up of MOSFET or IGBT.

2. comprise negative voltage generation circuit according to aforesaid right requirement 1.

3. comprise multiplication of voltage generative circuit according to aforesaid right requirement 1.

4. comprise a plurality of unit parallel circuits according to aforesaid right requirement 1.

5. comprise a plurality of units in series circuit according to aforesaid right requirement 1.

6. comprise a plurality of unit cascaded circuit according to aforesaid right requirement 1.

7. comprise batteries energy dynamics equalizer according to aforesaid right requirement 1.

8. comprise IC design according to aforesaid right requirement 1.