WO2006057107A1 - スイッチング電源 - Google Patents
スイッチング電源 Download PDFInfo
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- WO2006057107A1 WO2006057107A1 PCT/JP2005/018569 JP2005018569W WO2006057107A1 WO 2006057107 A1 WO2006057107 A1 WO 2006057107A1 JP 2005018569 W JP2005018569 W JP 2005018569W WO 2006057107 A1 WO2006057107 A1 WO 2006057107A1
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- circuit
- output
- power supply
- soft start
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
Definitions
- the present invention relates to a switching power supply.
- the present invention relates to a switching power supply that includes a soft start circuit and outputs a predetermined negative voltage at an output side by switching a current flowing to a coil.
- a soft start circuit is employed to prevent destruction or malfunction of a switching transistor due to a rush power charging the output capacitor during startup or an IC that becomes a load on the switching power supply.
- FIG. 14 shows a circuit example of a switching power supply 10 00 of a positive voltage output of a step-down mode (a mode in which the relation of power supply voltage (Vcc)> output voltage (Vo), “: Buck Mode”) is output.
- the conventional switching power supply 1000 shown in FIG. 14 includes a soft start circuit 1001, a triangular wave generation circuit 1002, an error amplifier 1003, a comparator 1004, a drive unit 1005, a switching transistor Tr, a diode D, a coil L, a capacitor C, and a resistor R1 and It has R2.
- the output voltage from the soft start circuit 1001 is input as the reference voltage Vref of the error amplifier 1003.
- a voltage obtained by dividing the output voltage Vo by the resistors R1 and R2 is input to the error amplifier 1003 as the output voltage Vreftfe from the soft start circuit 1001. Also, Vcc is input to the source or drain of the switching transistor Tr. Note that the soft start circuit 1001 has a clamp circuit (not shown) that controls such that its output voltage does not exceed Vrel ⁇ !
- the reference voltage Vref can be increased by gradually increasing Vref ⁇ until a certain voltage is reached at the time of power on.
- the proportional output voltage Vo also gradually increases.
- FIG. 15 shows an operation waveform diagram of the conventional switching power supply 1000.
- FIG. 16 shows another circuit example of the switching power supply 1100 of a conventionally used step-down mode positive voltage output.
- the conventional switching power supply 1100 shown in FIG. 16 includes a soft start circuit 1101, a triangular wave generation circuit 1102, an error amplifier 1103, a comparator 1104, a drive unit 1105, a switching transistor Tr, a diode D, a coil L, a capacitor C, and a resistor. It has R1 and R2.
- the error amplifier 1103 is a 3-input error amplifier, to which the output voltage from the soft start circuit 1101, the reference voltage Vref, and the voltage obtained by dividing the output voltage Vo by the resistors R1 and R2 are input.
- Vcc is input to the source or drain of the switching transistor Tr.
- switching power supply 1100 is similar to that of switching power supply 1000 described above.
- the soft start circuit 1001 of the switching power supply 1000 described above requires a clamp circuit
- the soft start circuit 1101 of the switching power supply 1100 is different in that it is not necessary.
- FIG. 17 shows an operation waveform of the soft start circuit 1101.
- the voltage of the soft start circuit 1101 internal capacitor is 0 V, so the output voltage of the soft start circuit 1101 changes in proportion to time.
- the time (t2 ⁇ tl) until the output of the soft start circuit 1101 reaches the reference voltage Vref corresponds to the soft start period.
- FIG. 18 shows an operation waveform diagram of the conventional switching power supply 1100.
- the output voltage Vo proportional to the reference voltage Vref also gradually increases. This period corresponds to the soft start period (t2 ⁇ tl).
- the output voltage Vo satisfies the above equation (1).
- FIG. Fig. 19 shows an example of the circuit of the switching power supply 1200 of the positive voltage output of the conventional step-down mode adopting the soft start of the DTC method!
- the conventional switching power supply 1200 shown in FIG. 19 includes a soft start circuit 1201, a triangular wave generation circuit 1202, an error amplifier 1203, a comparator 1204, a driver 1205, a switching transistor Tr, a diode 0, a coil L, a capacitor C, and It has resistances R1 and R2.
- the error amplifier 1203 is a 2-input error amplifier and has an output voltage of V. The voltage is divided by the resistors R1 and R2 and the reference voltage Vrei3 ⁇ 4S is input.
- the comparator 1204 is a three-input comparator, to which the output of the error amplifier 1203, the output of the soft start circuit 1201, and the output of the triangular wave generation circuit 1202 are input. Also, Vcc is input to the source of the switching transistor Tr.
- FIG. 20 shows an operation waveform of switching power supply 1200. As shown in FIG. 20, it is shown that the switching power supply output voltage Vo gradually increases as the voltage at the output terminal of the comparator 1204 is gradually increased for a fixed time. The output voltage Vo satisfies the above equation (1).
- the threshold level shown in FIG. 20 is determined by the input voltage Vcc and the output voltage Vo.
- Patent Document 1 Japanese Patent Application Laid-Open No. 10-164825
- Each of the switching power supplies 1000, 1100, and 1200 described above is a switching power supply in a step-down mode that outputs a positive voltage although it has a soft start function.
- these switching power supplies are in boost mode (power supply voltage (Vcc) ⁇ output voltage (Vo)),
- the present invention has been made to solve the above problems, and provides a switching power supply having a soft start function.
- the switching power supply of the present invention is provided with a circuit having a soft start function, thereby preventing destruction or the like of the switching transistor due to a rush current for charging the output capacitor at startup, and a stable negative voltage. It can provide an output.
- a switching power supply controller including a soft start circuit; a coil; a switching element driven by an output of the switching power supply controller to control a current flowing to the coil; And an output stage comprising a diode connecting a force sort side to a connection point between the switching element and the coil; a voltage dividing circuit for dividing an output voltage of the soft start circuit and a voltage of the output end;
- a switching power supply is provided, comprising: a soft start period adjustment circuit for adjusting a start period.
- the switch power supply controller further includes an error amplifier, a comparator, a triangular wave generation circuit, and a drive circuit. Further, according to the present invention, an error amplifier, a comparator, a triangular wave generation circuit, and a drive circuit are provided, the comparator connects a soft start circuit, and the comparator has an input unit.
- a switching power supply controller having a P-channel transistor or a PNP transistor; a coil, a switching element driven by an output of the switch power supply controller to control a current flowing to the coil, an anode side as an output end, and a force saw
- An output stage comprising a diode connected to the switching element and a junction of the coil, and a voltage dividing circuit for dividing the output voltage of the soft start circuit and the voltage of the output end.
- a switching power supply comprising: a path; and a soft start period adjustment circuit for adjusting the soft start period.
- a switching power supply controller including a soft start circuit; a coil; a switching element driven by an output of the switching power supply controller to control a current flowing through the coil; A plurality of output stages comprising an output stage for negative voltage output comprising an output end and a diode connecting a force sort side to the connection point between the switching element and the coil; an output voltage of the soft start circuit and the output stage
- a switching power supply comprising: a voltage dividing circuit for dividing the voltage at an output end; a soft start period adjusting circuit for adjusting the soft start period; and a switching circuit for switching a rising sequence of the plurality of output stages.
- the soft start circuit may include a clamp circuit. Also, the error amplifier may be provided with a clamp function of the soft start circuit.
- the switching power supply of the present invention it is possible to provide a stable negative voltage output with a soft start function.
- the feedback function in the circuit can be operated immediately after the power is turned on, and the negative overshoot of the negative voltage output at the time of power on can be prevented, and the circuit element on the load side where the negative voltage is outputted You can eliminate damage to Therefore, it is possible to cope with the decrease in withstand voltage due to the miniaturization of the circuit element.
- a plurality of stable voltages can be output, and their rising sequence can be easily changed.
- -It is a circuit diagram of the switching power supply of this invention which concerns on embodiment.
- FIG. 2 is a circuit diagram of a soft start circuit 101 according to the embodiment.
- FIG. 3 is a circuit diagram of a clamp circuit 111 according to the embodiment.
- FIG. 4 is a waveform diagram of the soft start circuit 101 according to the embodiment.
- FIG. 5 is a waveform diagram of the switching power supply 100 according to the embodiment of the present invention.
- FIG. 6 is a diagram showing experimental results of the switching power supply 100 according to the embodiment of the present invention.
- FIG. 7 is a circuit diagram of a switching power supply 200 of the present invention according to an embodiment.
- FIG. 8 is a circuit diagram of a soft start circuit 201 according to the present embodiment.
- FIG. 9 is a waveform diagram of the soft start circuit 201 according to the present embodiment.
- FIG. 10 is a waveform diagram of the switching circuit 200 according to one embodiment.
- FIG. 11 A circuit diagram of an example of a switching power supply controller according to the present invention according to an embodiment.
- FIG. 12 is a diagram showing experimental results of voltage output of the switching power supply of the present invention according to the present embodiment.
- FIG. 13 is a view showing experimental results of voltage output of the switching power supply of the present invention according to the present embodiment.
- FIG. 14 is a diagram showing a circuit example of a conventional switching power supply 1000.
- FIG. 15 is an operation waveform diagram of a conventional switching power supply 1000.
- FIG. 16 is a diagram showing a circuit example of a conventional switching power supply 1100.
- FIG. 17 is a diagram showing an operation waveform of the soft start circuit 1101.
- FIG. 18 is an operation waveform diagram of a conventional switching power supply 1100.
- FIG. 19 is a diagram showing a circuit example of a conventional switching power supply 1200.
- FIG. 20 is an operation waveform diagram of a conventional switching power supply 1200.
- the switching power supply shown in Figure 1 adopts the Inverting Mode, which outputs a negative voltage, and outputs the reference voltage input to the error amplifier from the soft start circuit. By doing this, it is possible to operate the feedback function in the circuit immediately after power supply startup, and to prevent negative overshoot of the negative voltage output at power supply startup, and it is possible to perform load cycles at which negative voltage is output. Damage to the circuit elements on the side can be eliminated.
- Switching power supply (switching circuit) 100 includes soft start circuit 101, triangular wave generation circuit 102, error amplifier (error amplification circuit) 103, comparator (comparison circuit) 104, drive unit (drive circuit) 105, switching transistor (switching circuit) Element)
- the voltage divider circuit 106 includes a Trl, a diode D, a resonant line L, capacitors C1 and C2, and resistors R1 and R2.
- the switching power supply controller 107 includes a soft start circuit 101, a triangular wave generation circuit 102, an error amplifier 103, a comparator 104, and a drive unit 105.
- the output stage 108 includes a switching transistor Trl, a diode D, a coil L and a capacitor C1.
- the voltage dividing circuit 106 is configured by two resistors R1 and R2 so that the output voltage of the soft start circuit 101 and the output voltage (Vo) of the output end Vo are limited. Any circuit may be used as long as it has a pressing function. Also, variable resistance may be adopted for R1 and R2.
- capacitor C2 is a soft start period adjustment circuit
- FIG. 2 A circuit diagram of the soft start circuit 101 in the switching power supply 100 is shown in FIG.
- the soft start circuit 101 in the switching power supply 100 includes a constant current source 110, a switching transistor (switching element) Tr2, and a clamp circuit 111.
- capacitor C2 is soft-started.
- the capacitor C 2 may be built in the soft start circuit 101, which is not built in the path 101. This capacitor C2 is for adjusting the soft start period and functions as a soft start period adjustment circuit.
- the clamp circuit 111 includes an operational amplifier (operational amplification circuit) 120 and a switching transistor (switching element) Tr3.
- the upper potential VCI of the capacitor C2 is input to the inverting input (one) of the operational amplifier.
- the output of the operational amplifier 120 drives the switching element Tr3.
- the switching element Tr3 receives the output of the operational amplifier 120, controls the voltage output of the voltage source power of the predetermined voltage Vref, and outputs it as the output voltage VCO. Also, the output voltage VCO is fed back to the non-inverting input (+) of the operational amplifier 120.
- the clamp circuit 111 controls so that the output voltage of the soft start circuit 1001 does not exceed Vre.
- the output voltage Vo is divided using the output voltage of the soft start circuit 101. That is, the potential difference between the output voltage of the soft start circuit 101 and the output voltage (Vo) of the output terminal Vo is divided by the resistors R1 and R2.
- the output of this resistive voltage divider (output of voltage divider circuit 106) is an error amplifier 1 It is input to 03.
- the output of the error amplifier 103 is input to the non-inverting input (+) of the comparator 104.
- the triangular wave (or sawtooth wave) generated by the triangular wave generation circuit 102 is input to the inverting input (one) of the comparator 104.
- the comparator 104 compares the output of the error amplification circuit 103 with the triangular wave, and outputs the result as a pulse to the drive unit 105.
- the drive unit 105 receives the output of the comparator 104 as an input, and drives the switching element Trl.
- the switching element Trl turns ON / OFF the current flowing through the coil L based on the output from the drive unit 105.
- the switching element Trl When the switching element Trl is ON, electric energy is stored in the coil L, and when the switching element Trl is OFF, the electric energy stored in the coil L is output from the output terminal Vo as an electric power through the diode D. At this time, the electric energy force G ND stored in the coil, the external load circuit (not shown), the output end Vo, the anode of the diode D, and the force seed of the diode D return to the coil as current. So the circuit is configured. Further, when the switching element is ON, the diode side of the diode D1 becomes the Vcc voltage, so the diode D1 becomes nonconductive.
- a stable output can be obtained because a circuit is configured to flow from the lower terminal of capacitor C1 to the external load circuit, the output terminal Vo, and the upper terminal of capacitor C1 via GND. It can generate voltage. In any case, a negative voltage is generated at the output end Vo because the current that has flowed out also flows to the output end Vo. The output voltage Vo is fed back to the voltage dividing circuit 106 to form a feedback circuit.
- this feedback circuit starts to function immediately after power supply startup. At this time, due to the function of the feedback circuit, the potentials of the two inputs of the error amplification circuit 103 become almost equal (virtual short), and the output voltage Vo follows the following equation (3).
- Vo --3 ⁇ 4- Vref ⁇ (3) Therefore, by changing the output voltage of the soft start circuit as shown in FIG. 4, it is possible to soft start the negative voltage output as shown in FIG.
- FIG. 5 shows a waveform diagram of the switching power supply 100.
- the output voltage of the soft start circuit changes as shown in FIG. 4 immediately after the power is turned on, and the output voltage Vo changes accordingly, and after the soft start period (t2 ⁇ t1) ends.
- a stable negative voltage Vo can be obtained.
- FIG. 6 shows an experimental result of the switching power supply 100.
- the power supply voltage Vcc is 5 V
- Vrel3 ⁇ 4 1.2 V the output voltage Vo is 5 V.
- the switching power supply of the present invention it is possible to provide a stable negative voltage output having a soft start function.
- the feedback function in the circuit can be operated immediately after the power is turned on, and the negative overshoot of the negative voltage output at the time of power on can be prevented, and the circuit element on the load side where the negative voltage is outputted You can eliminate damage to Therefore, it is possible to cope with the decrease in withstand voltage due to the miniaturization of the circuit element.
- a switching power supply (switching circuit) 200 includes a soft start circuit 201, a triangular wave generation circuit 202, an error amplifier (error amplification circuit) 203, a comparator (comparison circuit) 204, a drive unit (drive circuit) 205, a switching transistor (switching element) It has a voltage dividing circuit 206 consisting of Trl, diode 0, coil L, capacitors C1 and C2, and resistors R1 and R2.
- the comparator 204 comprises a P-channel transistor or a PNP transistor at its input.
- the switching power supply controller 207 includes a soft start circuit 201, a triangular wave generation circuit 202, an error amplifier 203, a comparator 204, and a drive unit 205.
- the output stage 208 includes a switching transistor Trl, a diode D, a coil L, and a capacitor C1.
- the voltage dividing circuit 206 is configured by two resistors R1 and R2. The power is not limited to this. Any circuit may be used as long as it has a function of dividing the output voltage of (1) and the output voltage (Vo) of the output terminal Vo. Also, variable resistors may be adopted for R1 and R2. Also, a capacitor C2 is used as a soft start period adjustment circuit.
- FIG. A circuit diagram of the soft start circuit 201 in the switching power supply 200 is shown in FIG.
- the soft start circuit 201 has a constant current source 210 and a switching transistor (switching element) Tr2.
- the capacitor C2 may not be built in the soft start circuit 201.
- the capacitor C2 may be built in the soft start circuit 201. This capacitor C2 is used to adjust the soft start period and functions as a soft start period adjustment circuit.
- FIG. 7 will be referred to again.
- Vref3 ⁇ 4 pressure rises.
- the output voltage Vo is still 0V. Therefore, the output voltage of the voltage dividing circuit 206 is a positive voltage sufficiently larger than 0V.
- the comparator 204 compares the output voltage of the error amplification circuit 203, the output of the soft start circuit 201, and the output voltage of the triangular wave generation circuit 202.
- the comparator 204 functions so that the smaller of the two non-inverting inputs (+) is valid. . That is, the comparator 204 functions as a clamp circuit of the soft start circuit 201.
- a waveform chart of the soft start circuit 201 is shown in FIG. At power-on, as shown in FIG. 9, since the output of the soft start circuit 201 is 0 V, the output of the soft start circuit 201 is valid and output during the soft start period (t2 ⁇ tl). During this soft start period, feedback of switching power supply 200 is working!
- FIG. 10 shows an operation waveform of the switching power supply 200.
- the pulse width of the output of the comparator 204 gradually increases.
- the voltage dividing circuit 206 becomes almost 0V.
- the output voltage of the error amplification circuit 203 falls from the saturation voltage and becomes smaller than the output voltage of the soft start circuit 201, at timing t2.
- the soft start period ends. Also, at the same time as the soft start period ends at timing t2, the feedback of the switching power supply 200 starts to function.
- the switching power supply 200 it is possible to provide a stable negative voltage output with a soft start function.
- FIG. 1 An example circuit diagram of the switching power supply 600 is shown in FIG. First output stage 100-1, voltage dividing circuit 100-2 (resistors R1 and R2), soft start period adjusting circuit 100-3 (capacitor C2) and switching power supply controller 500 constitute switching power supply 100 for negative voltage output . Also, the second output stage 300-1, the voltage divider circuit 300-2 (resistors R1 and R2), the soft start period adjustment circuit 300-3 (capacitor C2), and the switching power supply controller 500 are used for positive voltage output in the step-down mode. Configure the power supply.
- the third output stage 400-1, the voltage dividing circuit 400-2 (resistors R1 and R2), the soft start period adjustment circuit 400-3 (capacitor C2), and the switching power supply controller 500 are power supplies for positive voltage output in the boost mode.
- the switching power supply controller 500 includes a soft start circuit, an error amplifier, a comparator and a driver.
- the soft-start period adjustment circuit (capacitor C2) for adjusting the soft-start time of each output power supply is externally connected.
- the capacitor C2 may be incorporated in the switching power supply controller 500 or may be externally attached.
- the switching power supply controller 500 has three voltage outputs: a negative voltage output Vo_Invert, a buck mode positive voltage output Vo_Buck, and a boost mode positive voltage output Vo_Boost. Note that the rise order of the outputs of these three voltages can be freely changed by changing the connection of the X section shown in FIG.
- P-GOOD3 of switching power supply controller 500 is connected to line L3 by T2, and P-GOOD2 is connected to line L1 by T1.
- the three voltage outputs are output in the order of step-down mode positive voltage output Vo_Buck, negative voltage output Vo_Invert, and step-up mode positive voltage output Vo_Boost.
- the rising sequence (rising order) of the three voltage outputs can be changed by changing the wiring connection of this X section (switching circuit) as follows.
- Vo—Buck ⁇ VoJnvert ⁇ Vo—Boost P— Connect GOOD2 to LI, P— Connect GOOD3 to L3 (2) Vo_Buck ⁇ Vo_Boost ⁇ Vo_Invert: P—Connect GOOD2 to L3 Connect, P-Connect GOOD1 to L1 (3) VoJnvert ⁇ Vo-Buck ⁇ Vo-Boost: P-Connect GOO D3 to L2, connect P-GOOD2 to L3 (4) Vo_Invert ⁇ Vo_Boost ⁇ Vo _ Buck : P— Connect GOOD3 to wiring L3; P— Connect GOOD1 to wiring L2 (5) Vo_Boost ⁇ Vo— Invert ⁇ Vo— Buck: P— Connect GOOD1 to wiring L1, P— Connect GOOD3 to wiring L2 (6 ) Vo_Boost ⁇ Vo_Buck ⁇ Vo_Invert: Connect P— GOOD1 to L2, P— GO OD2 to L1
- any of the circuits Vo_Boost and Vo_Buck may be changed, and both may be Vo_Boost or both may be Vo_Buck. However, it is necessary to change the external circuit between Vo_Boo st and Vo_Buck.
- FIG. 12 and 13 show experimental results of voltage output of the switching power supply controller 500.
- the power supply voltage Vcc is 5V
- the output voltage Vojnvert is -5V
- Vo_Buck 3.3V the output voltage Vojnvert is -5V
- Vo_Boost 16V the output voltage of the switching power supply controller 500.
- the three voltage outputs were launched in the following order: Vo_Buck3.3V, Vojnvert-5V, Vo_Boost. After the soft start period of about 10 msec, it can be seen that stable output is obtained.
- the power supply voltage Vcc is 9 V
- the output voltage Vojnvert is 5 V
- Vo_Buckl is 5 V
- Vo_Buck2 is 3.3 V.
- the three voltage outputs were launched in the following order: Vo_Buck2, Vojnvert, Vo_Buckl. After the soft start period of about 100 msec, stable outputs are obtained respectively.
- the switching power supply of the present invention can stably supply three power supply voltages including a negative voltage output, and can easily change their rise sequence.
- the switching power supply of the present invention it is possible to provide a stable negative voltage output with a soft start function.
- the feedback function in the circuit can be operated immediately after the power is turned on, and the negative overshoot of the negative voltage output at the time of power on can be prevented, and the circuit element on the load side where the negative voltage is outputted To damage It can be eliminated. Therefore, it is possible to cope with the decrease in withstand voltage due to the miniaturization of the circuit element.
- the switching power supply of the present invention can stably supply three power supply voltages including a negative voltage output, and can easily change their rise sequence.
- the switching power supply of the present invention can be used for various products such as liquid crystal displays, organic EL displays, etc. that require negative voltage output, including display.
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CN2005800324866A CN101027828B (zh) | 2004-11-26 | 2005-10-06 | 开关电源 |
US11/719,608 US8183844B2 (en) | 2004-11-26 | 2005-10-06 | Switching power source |
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JP2004-343212 | 2004-11-26 | ||
JP2004343212A JP4673046B2 (ja) | 2004-11-26 | 2004-11-26 | スイッチング電源 |
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US (1) | US8183844B2 (ja) |
JP (1) | JP4673046B2 (ja) |
CN (1) | CN101027828B (ja) |
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CN106357107B (zh) * | 2016-09-07 | 2019-04-30 | 昆山龙腾光电有限公司 | 电压调整电路及程控电源 |
JP6975538B2 (ja) * | 2017-02-15 | 2021-12-01 | ローム株式会社 | ソフトスタート回路 |
CN108418410A (zh) * | 2018-03-16 | 2018-08-17 | 上海艾为电子技术股份有限公司 | 带输出电压反馈的软启动电路 |
CN109274261A (zh) * | 2018-11-30 | 2019-01-25 | 中国电子科技集团公司第四十三研究所 | 一种非隔离负压输出控制电路及控制方法 |
CN110932531A (zh) * | 2019-11-26 | 2020-03-27 | 上海军陶电源设备有限公司 | 驱动电路及供电控制电路 |
CN114460994A (zh) * | 2020-11-09 | 2022-05-10 | 扬智科技股份有限公司 | 电压调整器 |
CN113949257A (zh) * | 2021-10-19 | 2022-01-18 | 珠海智融科技股份有限公司 | 一种基于平均电流模控制系统的软启动电路 |
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- 2004-11-26 JP JP2004343212A patent/JP4673046B2/ja active Active
-
2005
- 2005-10-06 US US11/719,608 patent/US8183844B2/en not_active Expired - Fee Related
- 2005-10-06 WO PCT/JP2005/018569 patent/WO2006057107A1/ja active Application Filing
- 2005-10-06 CN CN2005800324866A patent/CN101027828B/zh not_active Expired - Fee Related
- 2005-10-06 TW TW094134937A patent/TWI311847B/zh not_active IP Right Cessation
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JPS56164312U (ja) * | 1980-04-30 | 1981-12-05 | ||
JP2003061341A (ja) * | 2001-08-13 | 2003-02-28 | Sony Corp | 電源装置 |
JP2003299348A (ja) * | 2002-04-02 | 2003-10-17 | Rohm Co Ltd | 電源装置及びそれを備えた携帯機器 |
JP2004180385A (ja) * | 2002-11-26 | 2004-06-24 | Fujitsu Ltd | スイッチング電源 |
Also Published As
Publication number | Publication date |
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TWI311847B (en) | 2009-07-01 |
JP4673046B2 (ja) | 2011-04-20 |
US8183844B2 (en) | 2012-05-22 |
JP2006158055A (ja) | 2006-06-15 |
CN101027828A (zh) | 2007-08-29 |
US20090237047A1 (en) | 2009-09-24 |
CN101027828B (zh) | 2010-09-08 |
TW200627767A (en) | 2006-08-01 |
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