-
公开(公告)号：DE69921883T2
公开(公告)日：2005-11-03
申请号：DE69921883
申请日：1999-04-16
Applicant: SONY CORP
Inventor： SATO NOBUO , SEKIKAWA YUJI , IMAMURA NORITOSHI
Abstract: As for a switching power source, by alternately turning on first and second MOS transistors (Q1, Q2), a resonance current flows to a primary winding (L1) of a transfonner (T), and an alternate current is transmitted to a secondary side (L2). With respect to an alternate signal generated in a secondary winding (L2), a gate voltage is applied so that third MOS transistor (Q3) and fourth MOS transistor (Q4) are conductive, respectively, while the polarity of the alternate signal is positive. Rectifying currents are flowed to a capacitor (Co) and a full-wave rectification is executed. Since a control signal for synchronous control is supplied from a signal source to control the first and second switching elements (Q1, Q2) via transformers (Ta, Tb), a switching timing can be accurately coincided with an on/off timing of a synchronous rectifying device by a simple circuit.
-
公开(公告)号：DE69921883D1
公开(公告)日：2004-12-23
申请号：DE69921883
申请日：1999-04-16
Applicant: SONY CORP
Inventor： SATO NOBUO , SEKIKAWA YUJI , IMAMURA NORITOSHI
Abstract: As for a switching power source, by alternately turning on first and second MOS transistors (Q1, Q2), a resonance current flows to a primary winding (L1) of a transfonner (T), and an alternate current is transmitted to a secondary side (L2). With respect to an alternate signal generated in a secondary winding (L2), a gate voltage is applied so that third MOS transistor (Q3) and fourth MOS transistor (Q4) are conductive, respectively, while the polarity of the alternate signal is positive. Rectifying currents are flowed to a capacitor (Co) and a full-wave rectification is executed. Since a control signal for synchronous control is supplied from a signal source to control the first and second switching elements (Q1, Q2) via transformers (Ta, Tb), a switching timing can be accurately coincided with an on/off timing of a synchronous rectifying device by a simple circuit.
-
Patent Agency Ranking
公开(公告)号：JP2000009548A
公开(公告)日：2000-01-14
申请号：JP17546998
申请日：1998-06-23
Applicant: SONY CORP
Inventor： SEKIKAWA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a circuit part which achieves a higher temperature detection accuracy of a heating element and a curtailing of the number of parts and a higher reliability of a product by stabilizing thermal coupling between the heating element and a temperature detection element. SOLUTION: A circuit part 1 has a heating element 2 comprising a circuit component element such as a resistance or a semiconductor element adapted to generate heat by running a current, a temperature detection element 3 comprising an element such as posistor or thermistor and a case 4 molded by ceramics, a resin, metal or the like. The heating element 2 and the temperature detection element 3 are inserted and housed into a central part of the case 4 from an opening 41 being separated from each other and in contact with each other and a lead 31 is drawn outside from notches 42 and 43 formed in the case 4. The case 4 where the heating element 2 and the temperature detection element 3 are housed is filled with a coagulating thermal coupling material 5 with a lower heat resistance such as silicon or cement and the thermal coupling material 5 is coagulated to couple them integrally.
-
公开(公告)号：JP2004248352A
公开(公告)日：2004-09-02
申请号：JP2003032903
申请日：2003-02-10
Inventor： SEKIKAWA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a hot plug equipment where the output current of an output current limit circuit is set off in initial state while it is set on when the connector is connected to the hot plug equipment body. SOLUTION: In the hot plug equipment, a charge current is supplied to a capacitor 6 for protecting contact points of connectors 3 and 5 for connecting a power supply 2 to a hot plug equipment body 1, through an output current limit circuit 10 and the connector 3. The output current of the output current limit circuit 10 is set off in initial state while it is set to be on when the connector 3 is connected to the hot plug equipment body 1. COPYRIGHT: (C)2004,JPO&NCIPI
-
公开(公告)号：JPH11299232A
公开(公告)日：1999-10-29
申请号：JP10612498
申请日：1998-04-16
Applicant: SONY CORP
Inventor： SATO NOBUO , SEKIKAWA YUJI , IMAMURA NORITOSHI
Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of a switching power supply unit by performing rectifying operation efficiently without using an additional circuit, especially by supplying a rectified control voltage which is not delayed to the switching operation, thereby increasing the distribution angle of rectified voltage. SOLUTION: In this switching power supply unit, when MOS transistors Q1, Q2 are alternately turned on, resonance current flow through a primary winding L1 of a transformer, and an AC power is transferred to the secondary side. A gate voltage is applied to an alternating signal generated at a secondary winding L2 so that MOS transistors Q3, Q4 have continuity respectively, while its electrode is positive, and rectified currents id3, id4 flow into a capacitor C0 for full-wave rectification. Since this switching power supply unit is formed such that a control signal for synchronous control is supplied from a signal source for controlling the switching elements Q1, Q2 via transformers Ta, Tb, switching timing and the opening and closing timing of a synchronous rectifying element can be made to match exactly by the use of a simple circuit.
-
公开(公告)号：JP2006333690A
公开(公告)日：2006-12-07
申请号：JP2005157942
申请日：2005-05-30
Inventor： SEKIKAWA YUJI
Abstract: PROBLEM TO BE SOLVED: To extend a control range where output DC voltage of a current resonance-type power supply device can be made constant.
SOLUTION: In the current resonance-type power supply device, a high side switching element 2 and a low side switching element 3 are alternately turned on and a switching frequency is controlled in accordance with output DC voltage so as to make it constant voltage as shown in a figure 4. When the switching frequency is within a prescribed range, a duty ratio of ON of the high side switching element 2 and the low side switching element 3 is set to 50%. When the switching frequency becomes out of the prescribed range, the duty ratio of ON of the high side switching element 2 and the low side switching element 3 is changed.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：扩展可以使电流谐振型电源装置的输出直流电压恒定的控制范围。 解决方案：在目前的谐振型电源装置中，高侧开关元件2和低侧开关元件3交替接通，根据输出直流电压控制开关频率，使其恒定 电压如图4所示。当开关频率在规定范围内时，高侧开关元件2和低侧开关元件3的占空比为50％。 当开关频率超出规定范围时，高侧开关元件2和低侧开关元件3的导通占空比发生变化。 版权所有（C）2007，JPO＆INPIT
-
公开(公告)号：JPH10309082A
公开(公告)日：1998-11-17
申请号：JP11117297
申请日：1997-04-28
Applicant: SONY CORP
Inventor： SEKIKAWA YUJI
Abstract: PROBLEM TO BE SOLVED: To prevent the breakage of a circuit by dissolving the stress to rush current suppression circuit. SOLUTION: The AC input voltage from an Ac power source 1 is supplied to the AC input end of a diode bridge 2, and the rectified voltage obtained at the rectified output end is supplied to a primary capacitor 3. The DC voltage filtered with this filter capacitor 3 is supplied to a DC-DC converter 3, and is converted into desired DC voltage, and this DC voltage is supplied to the circuit and the latter stage as the secondary input. Furthermore, one side of the neutral points of connection between the rectified output end of a diode bridge 2 and a filter capacitor 3 is provided with a rush current suppression circuit 5 consisting of an element such as a resistor, or the like so as to suppress the rush current. Together with it, this power unit is provided with a temperature detecting circuit 6 in close vicinity to this rush current suppressive circuit 5, and the output of this temperature detecting circuit 6 is supplied to a control circuit 7, and when the temperature of the rush current suppression circuit 5 comes to a specified value, the control to stop the oscillation of, for example, a DC-DC converter 4 is performed.
-
-
-
-
-
-
Search Results
7
records
(took 0.021 seconds)
