TW201216785A - Full-bridge electronic ballast having simplified continuous-current-mode charge pump PFC circuit - Google Patents

Abstract

The configurations of an electronic ballast are provided in the present invention. The proposed ballast includes a filter circuit having a first and a second output terminals, a rectifier circuit having a first input terminal, a second input terminal coupled to the second output terminal of the filter circuit, and a first output terminal, and a continuous-current-mode charge pump PFC circuit including a first inductor having a first terminal coupled to the first input terminal and a second terminal coupled to the first output terminal of the filter circuit, a second inductor having a first terminal and a first capacitor having a first terminal coupled to the first terminal of the first inductor and a second terminal coupled to the first terminal of the second inductor.

Description

201216785 VI. Description of the Invention: [Technical Field] The present invention relates to a full-bridge electronic ballast with a simplified continuous current mode charging pump and a power factor correction (PFC) circuit. Especially a full-bridge electronic ballast with a simplified continuous current mode voltage source (or current source) charging pump PFC circuit. [Prior Art] φ With the advancement of lighting technology, electronic ballasts have gradually replaced electromagnetic ballasts (Electromagnetic ballast) in the lighting market. Compared with electromagnetic ballasts, electronic ballasts have the advantages of small size, light weight and long life. They are very competitive in the lighting market, so electronic stabilizers have great potential for development. However, in order to make the input current comply with the IEC 61000-3.-2 Class C specification, electronic ballasts with power factor correction are commonly used in lighting equipment. At present, the electronic ballast with power factor correction function is mainly in two stages (such as the first figure). The two-stage electric power ballast includes an AC input power supply (providing an AC input voltage Vin) and a filter circuit ( Including inductor 1 surface and capacitor cEMI), a rectifier circuit (including diode Dbrl-Dbr4), a PFC stage (including inductor Lpfc, diode Dy and switch Spfc) and a full bridge inverter (including inductor Ls) The capacitors CB and Cp, switch Si-S4 and lamps) have the following disadvantages: (1) More components are required, and the circuit cost is higher. (2) Both the power factor correction circuit and the power stage need to control ic, and the circuit is more complicated.

S 3 201216785 In order to solve the above disadvantages 1, a half-bridge electronic ballast with a discontinuous current mode charging pump power correction circuit (such as the second figure) was developed. The half bridge electronic ballast with a discontinuous current mode charging pumping power correction circuit includes a PFC stage (including a PFC stage including the AC input power source, the filter circuit and the rectifying circuit in the first figure) A capacitor Cin and diode Dy), a half bridge inverter (including inductor Ls, capacitors CB and Cp, switches S1-S2 and the lamp) and an output capacitor Cdc. However, the half-bridge electronic ballast with the discontinuous current mode charging pump due to the correction circuit still has the following disadvantages: (1) The circuit operates in the discontinuous conduction mode, and the input current has a large di/dt, electromagnetic miscellaneous The interference is more serious. (2) The circuit has a large peak current and must use circuit components with high current resistance. Since the half-bridge architecture is not suitable in many medium and high power lighting applications, the present invention combines continuous current mode charging pump power factor correction techniques (such as the third and fourth figures) with a full bridge electronic ballast. The equivalent circuit of the continuous current mode voltage source charging pump power factor correction circuit as shown in the third figure has a rectified DC voltage source (providing a rectified voltage |Vin| and a current Iin), a diode Dx And Dy, the inductor Lpfc, the capacitor Cin, the voltage source (to provide a voltage Va), the load, and the output capacitor Cdc, and one of the output capacitors Cdc is across an output voltage Vbus. The equivalent circuit of the current source charging pump power factor correction circuit of the continuous current mode as shown in FIG. 4 is different from the third figure in that one diode Dx is missing, and the rectified DC voltage source is provided. a current lpfc, the current 201216785 capacitor Cin has a voltage across the Vein and is electrically connected in parallel with the diode Dy, the voltage source Va is replaced by a current source (supply current Is), and the output capacitor Cdc is output voltage The source (to provide a DC output voltage Vbus) is replaced. In this way, not only can the components of the circuit architecture and the driver circuit be simplified, but also the power factor correction inductance and the input filter volume can be reduced by the charging pump power correction circuit, thereby reducing the circuit cost and reducing the circuit volume. And because the circuit operates in continuous current mode, it has less input current harmonic distortion, higher input current power factor, lower switching, and diode conduction and switching losses, which in turn improves overall circuit efficiency. As a result of the job, the inventor, in view of the lack of the prior art, thought of and improved the idea of invention, and finally invented the "full-bridge electronic ballast with a simplified continuous current mode charging pump power correction circuit". SUMMARY OF THE INVENTION The main purpose of the present invention is to provide a full-bridge electronic ballast 1 with a simplified continuous current mode charging pump PFC circuit. Because of its use of the charging pump PFC technology, it has the following advantages: Requires component count, ® which reduces circuit cost, low input current harmonic distortion and high power factor, and reduces the size of components such as PFC inductors and EMI filters, as well as reducing switching and diode conduction loss. Another main object of the present invention is to provide an electronic ballast including a filter circuit having a first output terminal and a second output terminal, and receiving an AC input voltage, a rectifier circuit having a first input terminal and a second input terminal And a first output terminal, wherein the second input terminal is coupled to the second output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first power 5 201216785 sense, having a first end a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit, a first diode, having an anode a cathode, wherein the cathode is coupled to the first output end of the rectifier circuit, and a second inductor has a first end, a first capacitor, and a first end and a second end, wherein the cathode One end is coupled to the first end of the first inductor, and the second end is coupled to the anode of the first diode and the first end of the second inductor, and a second diode a cathode coupled to the first end of the second inductor, and a A full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. A main purpose of the present invention is to provide an electronic ballast including a filter circuit having a first output terminal and a second output terminal, and receiving an AC input voltage, a rectifier circuit having a first input terminal and a second input terminal And a first output terminal, wherein the second input terminal is coupled to the second output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first inductor having a first end and a second end The first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit, a second inductor, a first end, and a first end a capacitor having a first end and a second end, wherein the first end is coupled to the first end of the first inductor, and the second end is coupled to the first end of the second inductor, and a A full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. A further object of the present invention is to provide an electronic ballast comprising a filter circuit having a first output and a second output terminal, and receiving an AC input 201216785 input voltage, a rectifier circuit having a first and a second An input end and a first output end, wherein the second input end is coupled to the second input-output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first inductor, having a first And a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit, a first capacitor has a first end a second capacitor having a first end and a second end, wherein the first end is coupled to the first end of the first capacitor, and a second end is coupled to the first end The second terminal of the capacitor and a full bridge inverter are coupled to the continuous current mode charging pump PFC circuit and generate an AC output voltage. The above described objects, features, and advantages of the present invention will become more apparent from the description of the preferred embodiments of the invention. The charging pump PFC circuit includes a power factor correction inductor Lpfc, a charging pump capacitor Cin, an equivalent diode® Dy, etc., and can be divided into a voltage source and a current source according to different circuit connections, as described above. The third and fourth figures show that the voltage source type is mainly a series high frequency voltage source as a reference signal source, and the current source type is a parallel high frequency current source as a reference signal source, both of which can Achieve the effect of the correction. Figure 5 is a circuit diagram of a full bridge electronic ballast of a voltage source charging pump PFC circuit with a reduced continuous current mode in accordance with a first preferred embodiment of the present invention. In the fifth diagram, in addition to the first input current 201216785 flow input power source, the filter circuit, the rectifier circuit, the full bridge inverter, and the output capacitor Cdc shown in the second figure. In addition, the difference from the first figure is that the PFC stage in the figure is replaced by a compact AC continuous current mode charging pump PFC circuit' and the reduced AC terminal continuous current mode voltage The source charging pump PFC circuit includes a set of charging pump PFC circuits: inductor LPfc / rectifier diode Dbrl / capacitor Cin / diode Drl and Dr2 / inductor Lx. In the above-mentioned charging pump punching circuit, the diode Dy (not shown) which should be used in the charging pump PFC circuit is replaced by the rectifying diode Dbrl of the rectifier circuit because less than one diode is used. , making the circuit more streamlined. In the electronic ballast shown in the fifth figure, the first capacitor Cin is directly connected to one end of the first inductor Lpfc. Preferred embodiments of the present invention, such as the full bridge electronic ballast shown in FIG. 5, utilize the previously mentioned charging pump pFc technology, combined with a full bridge electronic ballast to improve its power. Factor and get good chopping distortion. Figure 6 is a circuit diagram of a full bridge electronic ballast with a reduced voltage continuous current mode voltage source charging pump power factor correction in accordance with a second preferred embodiment of the present invention. The main difference between the electronic stabilizer shown in the sixth and fifth figures is that the electronic ballast shown in the sixth figure further has a reading tank composed of a reading capacitor Cr: Cr/Lx. (4) A circuit diagram of a full bridge electronic ballast with a precision, continuous current mode voltage source charging pump power factor correction in accordance with a third preferred embodiment of the present invention. The main difference between the electronic ballast shown in the seventh figure and the fifth figure is that the voltage source charging pump pFc circuit of the streamlined continuous current mode of the streamlined 201216785 type of the electronic ballast shown in FIG. 7 includes Two sets of charging pump PFC circuit]•Inductor Lpfe/rectifier diode Dbrl/capacitor Cinl/electrode body Drl/inductor Lxl and 2 inductor

Lpfc / rectifier diode Dbr. 3 / capacitor Cin2 / clamp diode Dr2 / inductor Lx2. In the above two sets of charging pump PFC circuit towel 'Qian route flow diode diode nD (10) to replace the two sets of charging pump PFC circuit should be used in the diode % and % (both not shown) 'because less two two The polar body makes the circuit more compact. Figure 8 is a circuit diagram of a full bridge type electronic ballast of a voltage source charging pump pFC circuit having a precision & continuous current mode in accordance with a fourth preferred embodiment of the present invention. The electronic ballast shown in Fig. 8 is different from the electronic ballast shown in Fig. 7 in that the two clamp diodes Dr1_Dr2 are connected in a different manner from that shown in the seventh figure. Figure 9 is a circuit diagram of a full-bridge electric φ substabilizer of a voltage source charging pump PFC circuit with a simplified continuous current mode in accordance with a fifth preferred embodiment of the present invention. The main difference between the ninth and seventh and eighth electronic stabilizers is that the ninth diagram has four clamped diodes Drl-Dr4. Figure 11 is a circuit diagram of a full bridge type electronic ballast of a voltage source charging pump PFC circuit having a simplified continuous current mode in accordance with a sixth preferred embodiment of the present invention. The main difference between the tenth and ninth electronic ballasts is that there are four sets of charging pump PfC circuits in the tenth figure: 1. Lpfc/Dbrl/Cinl/Drl/Lxl, 2. Lpfc/Dyl /Cin2/Dr2/Lxl, 3. Lpfc/Dbr3/Cin3/Dr3/Lx2, and 4. Lpfc/Dy2/Cin4/Dr4/Lx2. 201216785 In the above four groups of charging pump PFC circuits, the m body of the #流电路^ and the Dbl3 replace the two sets of charging pump PFC circuits, the original Erlang body and iv are not shown), because less two two The polar body makes the circuit more compact. The tenth-figure is a circuit diagram of a full bridge electronic ballast of a simplified continuous electric dragon type m charging pump PFC circuit in accordance with a seventh preferred embodiment of the present invention. The main difference between the electronic ballast shown in the eleventh and tenth figures is that the equivalent diode Dyl-D.y4 (both not shown) in the four groups of charging pump PFC circuits are rectified. Figure 11 (a) is a circuit diagram of a full bridge electronic ballast of a voltage source charging pump PFC circuit with a reduced continuous current mode in accordance with an eighth preferred embodiment of the present invention. The electronic ballast as shown in FIG. 12(a) includes a filter circuit having a first output terminal and a second output terminal, and receiving an AC input voltage Vin, a rectifier circuit having a first and a first a second input end and a first output end, wherein the second wheel end is coupled to the second output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first inductor Lpfc, having a first One end and a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit 'a first diode Drl, Having an anode and a cathode, wherein the cathode is coupled to the first output end of the rectifier circuit, a second inductor Lx having a first end ′ a first capacitor cin having a first end and a second end Wherein the first end face is coupled to the first end of the first inductor Lpfc, and the second end is coupled to the anode of the first diode 220r and the first end of the second inductor Lx, and One second diode 201216785

Dr2 has a cathode coupled to the first end of the second inductor Lx, and a full bridge inverter coupled to the continuous current mode charging pump pfC: circuit' and generating an AC output voltage. In the twelfth diagram (a), the electronic ballast further includes a second capacitor Cdc, wherein the rectifier circuit further has a second output end, the first bridge and the second input end of the full bridge inverter device a midpoint, a first and a second output, and a bridge arm. The bridge arm includes a first switch phantom coupled to the first input and the midpoint of the full bridge inverter, and has a first a first switch bypassing the second φ pole body ′ and a second switch S2 shank at the midpoint and the second input end of the full bridge inverter, and having a second switch bypass diode The continuous current mode charging pump PFC circuit further includes a third diode Dbrl 1 having an anode and a cathode. The cathode of the third diode DbT1 is coupled to the cathode of the first diode Drl. The anode of the triode Dbrl is coupled to the first end of the first capacitor Cin, and the third diode Dbr1 is used to replace the Dy (not shown) of the charging pump PFC circuit to simplify the circuit. The second inductor Lx has a second end coupled to the midpoint of the full bridge inverter, the cathode coupling of the first diode Drl The second input end of the full-bridge inverter is coupled to the second output end of the rectifier circuit, and the rectifier circuit includes the second diode The body Dbr1, the bypass diode of the first switch S1, the bypass diode of the second switch S2, and a fourth diode Dbr2, the second diode Dr2 further includes an anode coupled to the body The second input end of the full bridge inverter, and the second capacitor Cdc is electrically connected in parallel to the first and the first output ends of the full bridge inverter. As shown in the twelfth figure (a), the electronic ballast' wherein the second capacitor Cdc is an output capacitor, and the continuous current mode charging pump PFC circuit is a continuous current mode voltage source charging pump PFC circuit. Figure 12 (b) is an input voltage Vin and an input current Iin of a full-bridge electronic ballast of a voltage source charging pump PFC circuit with a reduced continuous current mode according to an eighth preferred embodiment of the present invention. Analog waveform diagram. Referring to FIG. 12(a), the electronic ballast includes a filter circuit having a first output terminal and a second output terminal, and receiving an AC input voltage, a rectifier circuit having a first input terminal and a second input terminal And a first output end, wherein the φ second input end is coupled to the second output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first inductor, having a first end and a first a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit, a second inductor, a first end, and a first end The first capacitor has a first end and a second end, wherein the first end is coupled to the first end of the first inductor, and the second end is coupled to the first end of the second inductor, and A full bridge inverter is coupled to the continuous current mode charging pump PFC circuit and generates an AC output voltage. Figure 13 is a circuit diagram of a full bridge electronic ballast of a voltage source charging pump PFC circuit having a reduced continuous current mode in accordance with a ninth preferred embodiment of the present invention. The main difference between the thirteenth image and the electronic ballast shown in FIG. 12(a) is that, in the thirteenth figure, the continuous current mode charging pump PFC circuit further includes a first end and a first a third capacitor Cr of the second end, the first end of the third capacitor Cr is coupled to the second inductor Lx 12 201216785 =:= the second capacitor & the second end of the second capacitor The anode of Dr2, and the third two inductors - harmonic _. For bribe capacitors, it is more up-to-date with the instrument, :=! (The eleventh figure shows that the electronic stability of the temple is more up-to-date, including a data circuit, with a first-and-second output End, and receiving an AC power transmission device - the first - and - the second input end and a first output

The charging pump includes a first-second first end, wherein the first-hybrid is coupled to the end of the rectifier circuit and the second is integrated with the second circuit of the Chengbo circuit, and the second inductor Lx' has a first And a first: the first of the first, the first and the second: the second: the first end and the second end coupled to the second inductor Lx - the full bridge inverter | |, _ in this continuous current mode ^

The circuit generates an AC output voltage. The device shown in FIG. 12 (8) to FIG. 13 further includes a first diode of one of an anode and a cathode plus a second diode Dr2, wherein the rectifier circuit Further, the cathode of the second diode IM is coupled to the first output end of the rectifier circuit. The anode of the first diode Dri is coupled to the first capacitor cin. The cathode of the second diode Dr2 is coupled to the first end of the second inductor Lx, and the anode of the second diode Dr2 is coupled to the second output of the rectifier circuit.

S 13 201216785 Figure 14 is a circuit diagram of a full bridge electronic ballast of a current source charging pump pFC circuit with a reduced continuous current mode in accordance with a tenth preferred embodiment of the present invention. The electronic ballast as shown in Fig. 14 includes a set of charging pump PFC circuits, Lpfc/Dbrl/Cin/capacitor Cs/Lx. Wherein, a diode Dbrl of a rectifier circuit (including a rectifying diode Dbrl-Dbr4) is used to replace the equivalent diode Dy (not shown) of the charging pump pFC circuit, and the electronic stability can be simplified. Circuit of the device. Figure 15 is a circuit diagram of a full-bridge galvanic electronic ballast of a current source charging pump pFC circuit having a reduced continuous current mode in accordance with an eleventh preferred embodiment of the present invention. The main difference between the fifteenth and fourteenth electronic ballasts is that the capacitance cin is connected differently than that shown in the fourteenth figure. Figure 16 is a circuit diagram of a full-bridge electronic ballast of a current source charging pump PFC circuit with a reduced continuous current mode according to a twelfth preferred embodiment of the present invention, having two sets of charging pumps PFC circuit

Lpfc/Dbrl/Cinl/Lxl/Csl and Lpfc/Dbr2/Cin2/Lx2/Cs2. The diodes Dbr1 and Dbr3 including one of the rectifier diodes Dbrl-Dbr4 are used to replace the equivalent diodes Dyl/Dy2 of the two sets of charging pump PFC circuits (all not shown), Streamline the circuit of the electronic ballast. Figure 17 is a circuit diagram of a full bridge electronic ballast of a current source charging pump PFC circuit having a reduced continuous current mode in accordance with a thirteenth preferred embodiment of the present invention. The main difference between the seventeenth and sixteenth electronic ballasts is that the two capacitors Cin1/Cin2 are connected differently. 14 201216785 FIG. 18 is a circuit diagram of a full bridge electronic ballast with a current source charging pump power factor correction in a reduced continuous current mode in accordance with a fourteenth preferred embodiment of the present invention. Referring to the electronic ballast shown in FIG. 18, comprising a filter, wave circuit, having a first and a second output terminal and receiving an AC input voltage, a rectifier circuit having a first and a first a second input end coupled to the first output end, wherein the second input end is coupled to the second output end of the filter circuit, a continuous current mode charging pump PFC circuit, including a first inductor Lpfc, having a first And a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit, a first capacitor Cin, having a first One end, a second capacitor Cs having a first end and a second end, wherein the first end is coupled to the first end of the first capacitor Cin, and the second inductor Lx has a first end And coupled to the second end of the second capacitor Cs, and a full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. _ See the electronic ballast shown in FIG. 18, wherein the rectifier circuit includes a diode DbT1, a bypass diode of the first switch S1, a bypass diode of the second switch S2, and a diode Dbr2, the diode Dbrl is used to replace the Dy (not shown) of the charge pump PFC circuit to simplify the circuit. The first capacitor Cin further includes a second end coupled to the first output of the rectifier circuit, and the continuous current mode charging pump PFC circuit is a continuous current mode current source charging pump PFC circuit. Figure 19 is a full bridge of a current source charging pump PFC circuit with a reduced continuous current mode in accordance with a fifteenth preferred embodiment of the present invention.

Circuit diagram of the S 15 201216785 electronic ballast. The main difference between the electronic ballast shown in FIG. 19 and FIG. 18 is that the first capacitor Cin is connected differently. In the nineteenth figure, the second end of the first capacitor Cin It is lightly coupled to the second output of the rectifier circuit. In the preferred embodiments shown in the fifth to the nineteenth embodiments, the series inductor Lx/Lxl/Lx2 is used to reduce the on-time of the switch. The charging pump capacitor Cin/Cin 1 /Cin2 Inrush current caused by drastic changes in cross-pressure. In addition, the series inductor lx/Lx1/Lx2 also has the function of storing energy and converting to the load terminal. An additional set of LC series resonant tanks (Cr/Lx) added in Figure 13 is used to provide a high frequency voltage source for reference to the charging pump capacitor Cin. The diodes of the Dr series (including Drl-Dr2 or Dr-Dr4) are clamped diodes, which are mainly used to clamp the current on the inductor for continuous flow when the switch is turned off, and can be clamped by = The diode provides a way to release energy, and can reduce the mutual resonance between the charging pump capacitor (5) (five) / (five), and therefore, has the function of reducing the switching voltage stress. Embodiment 1. An electronic ballast comprising: a filter circuit having a first and a width-to-output terminal and receiving an AC input voltage: a rectifier circuit having a first and a second wheel And a first output: wherein the second input is coupled to the second output of the filter circuit, a continuous current mode charging pump power factor correction (pFc) circuit, package 201216785 includes: a first inductor, a first end and a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit; a first diode An anode and a cathode, wherein the cathode is coupled to the first output end of the rectifier circuit; a second inductor having a first end; a first capacitor having a first end and a first a second end, wherein the first end is coupled to the first end of the first inductor, and the second end is coupled to the anode of the first diode and the first end of the second inductor; a second diode having a cathode coupled to the first end of the second inductor; A full-bridge inverter is coupled to the charge pump continuous current mode PFC circuit, and generates an AC output voltage. 2. The ballast as described in the first embodiment further includes a second capacitor, wherein the whole stream circuit has a second output end, the first bridge and the second input end, the first bridge a midpoint, a first and a second output, and a bridge arm, the bridge arm including a first switch coupled to the first input end and the midpoint of the full bridge inverter, and having a first switch a bypass diode, and a second switch coupled to the midpoint and the second input end of the full bridge inverter and a second switch - and having a second switch bypass diode The continuous current mode charging pump PFC circuit further includes a third diode having an anode and a cathode, the cathode of the third diode being coupled to the cathode of the first diode, and the third diode The anode is coupled to the first 17 201216785 end of the first capacitor, and the second inductor has a second end coupled to the midpoint of the full bridge inverter, the first diode a cathode is coupled to the first input end 1 of the full bridge inverter and the second input end of the full bridge inverter is coupled to the rectification The second output end of the circuit, the rectifier circuit includes the third diode, the first switch bypass diode, the second switch bypass diode, and a fourth diode, the second The pole body further includes an anode coupled to the second input end of the full bridge inverter, and the second capacitor is electrically connected in parallel to the first and second output ends of the full bridge inverter . 3. The ballast of any of the preceding embodiments, wherein the second capacitor is an output capacitor 1 and the continuous current mode charge pump PFC circuit is a continuous current mode voltage source charging pump PFC circuit. 4. The ballast of any one of the preceding embodiments, wherein the continuous current mode charging pump PFC circuit further comprises a third capacitor having a first end and a second end, the first end of the third capacitor The second end of the third capacitor is coupled to the anode of the second diode. 5. An electronic ballast comprising: a filter circuit having a first and a second output terminal and receiving an AC input voltage; a rectifier circuit having a first and a second input and a first An output terminal, wherein the second input terminal is coupled to the second output end of the filter circuit; a continuous current mode charge pump power factor correction (PFC) circuit, comprising: a first inductor having a first end a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the 201216785 filter circuit; a second inductor having a first end And a first capacitor having a first end and a second end, wherein the first end is coupled to the first end of the first inductor, and the second end is coupled to the first end of the second inductor And a full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. 6. The ballast as in any one of the above embodiments further includes a first diode and a second diode each having an anode and a cathode, wherein the rectifier circuit further has a second output. The cathode of the first diode is coupled to the first output end of the rectifier circuit, the anode of the first diode is coupled to the first end of the first capacitor, the second diode The cathode is coupled to the first end of the second inductor, and the anode of the second diode is coupled to the second output of the rectifier circuit. 7. The ballast of any one of the preceding embodiments, wherein the full bridge inverter has a first and a second input end and a midpoint, the second inductor has a second end, the first The second end of the second inductor is coupled to the midpoint, the cathode of the first diode is coupled to the first input of the full bridge inverter, and the second of the full bridge inverter The input is coupled to the second output of the rectifier circuit. 8. An electronic ballast comprising: a filter circuit having a first and a second output and receiving an AC input voltage; a rectifier circuit having a first and a second input and a first Output 201216785 terminal 'where the second input is summed to the second round of the data circuit; a continuous current mode charging pump power factor correction (PFC) circuit, comprising: a first inductor, 'has one a first end and a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit; a first capacitor, Have a first end;

a second capacitor having a first end and a second end, wherein the first end is coupled to the first end of the first capacitor; and a second inductor having a first end coupled to the second end The second end of the capacitor; and a full bridge inverter coupled to the continuous current mode charging pump PFC circuit' and generating an AC output voltage. The ballast of any one of the preceding embodiments, wherein the first capacitor further comprises a second end coupled to the first output end of the rectifier circuit, and the connection

The continuous current mode charging pump PFC circuit is a continuous current mode current source charging pump PFC circuit. H). The ballast of any of the preceding embodiments, wherein the first capacitor further comprises a second end coupled to the second output of the rectifier circuit. As described above, the present invention provides a pure electronic current of a compact continuous current mode electrocardiogram=PFC circuit. Since it uses a charging pump, it has the following advantages: it can reduce the number of components required for the circuit. Low circuit cost, low input current read wave distortion and high power factor 20 201216785 and can reduce the size of components such as PFC inductors and EMI filters, as well as reduce switching losses and conduction losses of diodes, so it does have Progressive and novel. Even though the present invention has been described in detail by the above-described embodiments, it can be modified by those skilled in the art, and is not intended to be protected by the scope of the appended claims. [Simple diagram of the diagram] Figure 4 is a circuit diagram of a two-stage electronic ballast that is not known to the conventional technology; ^4 ', which is a half-bridge type electronic device that does not have a continuous current mode charging pump PFC circuit. Stability circuit diagram; ^ shows the circuit diagram of the equivalent circuit of the voltage source charging shoulder PFC circuit of the continuous current mode; the fourth picture shows the circuit diagram of a conventional continuous electromyography _ 祉 circuit / minus u charging Figure 5 to the twelfth (4) diagram: the first to the eleventh chapters of the stipulations of the present invention, the twelfth _ _ • • the system shows a basis: the circuit diagram of the device; The eleventh figure of the first person who has the idea of perfecting the full-bridge type electronic security and the charging of the PFC circuit of the charging pump is shown in the figure--the analog waveform diagram of the current according to the present invention. The circuit diagram of the bridge type electronic ballast of the ninth preferred embodiment with the simplified continuous current mode "x and the electric pump PFC circuit are all fourteenth to nineteenth: the system is divided into

S shows a circuit diagram of a full bridge electronic ballast of a current source charging pump PFC circuit with a reduced continuous current mode in accordance with the tenth to fifteenth preferred embodiment of the present invention. [Main component symbol description]

twenty two

Claims (1)

201216785 VII. Patent application scope: 1. An electronic ballast comprising: a filter circuit having a first and a second output terminal and receiving an AC input voltage; a rectifier circuit having a first and a first a second input end and a first output end, wherein the second input end is coupled to the second output end of the filter circuit, a continuous current mode charging pump power factor correction (PFC) circuit, and the package φ includes: a first An inductor having a first end and a second end ′, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit; a diode having an anode and a cathode, wherein the cathode is coupled to the first output of the rectifier circuit; a second inductor having a first end; a first capacitor having a first end and a first a second end, wherein the first end is coupled to the first end of the first inductor, and the second end is coupled to the anode of the first diode and the first end of the second inductor; a second diode having a cathode coupled to the first The first end of the second inductor; and a full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. 2. The ballast as described in claim 1 further includes a second capacitor, wherein the rectifier circuit further has a second output, the full bridge inverter 23 201216785 has a first and a second An input end, a midpoint, a first and a second output end, and a bridge arm, the bridge arm including a first switch coupled to the first input end and the midpoint of the full bridge inverter, and having a first switch bypass diode, and a second switch coupled to the midpoint and the second input of the full bridge inverter and a second switch, and having a second switch bypass diode The continuous current mode charging pump PFC circuit further includes a third diode having an anode and a cathode, the cathode of the third diode being coupled to the cathode of the first diode, and the The anode of the triode is coupled to the first end of the first capacitor, and the second inductor has a second end coupled to the midpoint of the full bridge φ inverter, the first diode The cathode is coupled to the first input of the full bridge inverter, and the second input of the full bridge inverter The end is coupled to the second output end of the rectifier circuit, the rectifier circuit includes the third diode, the first switch bypass diode, the second switch bypass diode, and a fourth diode The second diode further includes an anode coupled to the second input end of the full bridge inverter, and the second capacitor is electrically connected in parallel to the first and the second bridge inverter Second output. 3. The ballast of claim 2, wherein the second capacitor * is an output capacitor, and the continuous current mode charging pump PFC circuit is a continuous current mode voltage source charging pump PFC circuit. 4. The ballast of claim 2, wherein the continuous current mode charging pump PFC circuit further comprises a third capacitor having a first end and a second end, the first of the third capacitor The end is coupled to the first end of the second inductor, and the second end of the third capacitor is coupled to the anode of the second diode. 201216785. 5. An electronic ballast comprising: a filter circuit Having a first output and a second output terminal, and receiving an AC input voltage; a rectifier circuit having a first and a second input end and a first output end, wherein the second input end is coupled to the filter a second output of the circuit; a continuous current mode charging pump power factor correction (PFC) circuit comprising: a first inductor having a first end and a second end, wherein the first end 10 is coupled to the a first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit; a second inductor having a first end; and a first capacitor having a first end and a first end a second end, wherein the first end is coupled to the first inductor The first end, and the second end is coupled to the first end of the second inductor; and a full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage . 6. The ballast of claim 5, further comprising a first diode and a second diode each having an anode and a cathode, wherein the rectifier circuit further has a second output. The cathode of the first diode is coupled to the first output end of the rectifier circuit, the anode of the first diode is coupled to the first end of the first capacitor, and the second diode A cathode is coupled to the first end of the second inductor, and the anode of the second diode is coupled to the second output of the rectifier circuit. 7. The ballast of claim 6, wherein the full bridge inverse s 25 201216785 transformer has a first and a second input end and a midpoint, the second inductor has a second end, The second end of the second inductor is coupled to the midpoint, the cathode of the first diode is coupled to the first input of the full bridge inverter, and the full bridge inverter The second input is coupled to the second output of the rectifier circuit. 8. An electronic ballast comprising: a filter circuit having a first and a second output and receiving an AC input voltage; a rectifier circuit having a first and a second input and a first An output _ terminal, wherein the second input is coupled to the second output of the filter circuit: a continuous current mode charge pump power factor correction (PFC) circuit, comprising: a first inductor having a first end And a second end, wherein the first end is coupled to the first input end of the rectifier circuit, and the second end is coupled to the first output end of the filter circuit; a first capacitor having a first end a second capacitor having a first end and a second end, wherein the first end is coupled to the first end of the first capacitor; and a second inductor having a first end coupled to the first end The second end of the second capacitor; and a full bridge inverter coupled to the continuous current mode charging pump PFC circuit and generating an AC output voltage. 9. The ballast of claim 8, wherein the first capacitor 26 201216785 further includes a second end coupled to the first output of the rectifier circuit, the ugly continuous current mode charging pump PFC The circuit is a continuous current mode current source charging pump PFC circuit. 10. The ballast of claim 8, wherein the first capacitor further comprises a second end coupled to the second output of the rectifier circuit. 27